Nprl3

UniProt ID: Q9VUB4
Organism: Drosophila melanogaster
Review Status: INITIALIZED
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Gene Description

GATOR1 complex subunit that inhibits TORC1 signaling and supports starvation responses in the germline and soma.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0034198 cellular response to amino acid starvation
IBA
GO_REF:0000033
ACCEPT
Summary: Nprl3 participates in the response to amino-acid starvation.
Reason: The Nprl2/Nprl3 complex mediates an adaptive response to amino-acid starvation.
Supporting Evidence:
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:1904262 negative regulation of TORC1 signaling
IBA
GO_REF:0000033
ACCEPT
Summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid starvation.
Reason: Both UniProt and starvation studies describe Nprl3-mediated inhibition of TORC1 in response to amino-acid limitation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:24786828
Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.
GO:0010508 positive regulation of autophagy
IBA
GO_REF:0000033
KEEP AS NON CORE
Summary: Nprl3 promotes autophagy during nutrient stress via TORC1 inhibition.
Reason: Mutants fail to activate autophagy under amino-acid starvation, indicating positive regulation of autophagy by GATOR1.
Supporting Evidence:
PMID:27672113
nprl2 and nprl3 mutants fail to activate autophagy in response to amino acid limitation
GO:1990130 GATOR1 complex
IBA
GO_REF:0000033
ACCEPT
Summary: Nprl3 is a core subunit of the GATOR1 complex.
Reason: UniProt annotates Nprl3 as a probable GATOR1 subcomplex component, supporting this complex membership.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
probable component of the GATOR1 subcomplex which is likely composed of Iml1, Nplr2 and Nplr3
file:genes/DROME/Nprl3/Nprl3-deep-research-falcon.md
GATOR1 is a conserved heterotrimer composed of DEPDC5, NPRL2, and NPRL3.
GO:0005737 cytoplasm
IEA
GO_REF:0000044
KEEP AS NON CORE
Summary: Nprl3 localizes to the cytoplasm.
Reason: UniProt reports cytoplasmic localization.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
SUBCELLULAR LOCATION: Cytoplasm
GO:0005764 lysosome
IEA
GO_REF:0000044
KEEP AS NON CORE
Summary: Nprl3 localizes to lysosomes under nutrient stress.
Reason: Lysosomal targeting is reported for Nprl2/Nprl3.
Supporting Evidence:
PMID:24786828
Nprl2 and Nprl3 physically interact and are targeted to lysosomes and autolysosomes
GO:0032007 negative regulation of TOR signaling
IEA
GO_REF:0000002
MODIFY
Summary: This term is too general for the specific TORC1 inhibition shown for Nprl3.
Reason: Evidence supports inhibition of TORC1 specifically; replace with the TORC1-specific term.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
GO:0051301 cell division
IEA
GO_REF:0000043
MARK AS OVER ANNOTATED
Summary: General cell division is too broad relative to the specific mitotic-to-meiotic transition role.
Reason: Evidence indicates a specific mitotic/meiotic transition control rather than broad cell division.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
down-regulate TORC1 to slow cellular metabolism and promote the mitotic/meiotic transition
GO:0051321 meiotic cell cycle
IEA
GO_REF:0000043
MODIFY
Summary: Meiotic cell cycle is captured more precisely by germline mitotic-to-meiotic switching.
Reason: Use the more specific germline cell cycle switching term supported by ovarian cyst data.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
down-regulate TORC1 to slow cellular metabolism and promote the mitotic/meiotic transition
GO:0005515 protein binding
IPI
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lyso...
KEEP AS NON CORE
Summary: Nprl3 physically interacts with Nprl2; high-throughput interaction datasets also report binding.
Reason: Interaction evidence supports protein binding, but the term is generic and not core.
Supporting Evidence:
PMID:24786828
Nprl2 and Nprl3 physically interact
PMID:38944040
We describe a next-generation Drosophila protein interaction map
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
GO:0005515 protein binding
IPI
PMID:38944040
Next-generation Drosophila protein interactome map and its f...
KEEP AS NON CORE
Summary: Nprl3 physically interacts with Nprl2; high-throughput interaction datasets also report binding.
Reason: Interaction evidence supports protein binding, but the term is generic and not core.
Supporting Evidence:
PMID:24786828
Nprl2 and Nprl3 physically interact
PMID:38944040
We describe a next-generation Drosophila protein interaction map
GO:0034198 cellular response to amino acid starvation
NAS
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
ACCEPT
Summary: Nprl3 participates in the response to amino-acid starvation.
Reason: The Nprl2/Nprl3 complex mediates an adaptive response to amino-acid starvation.
Supporting Evidence:
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:1904262 negative regulation of TORC1 signaling
NAS
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
ACCEPT
Summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid starvation.
Reason: Both UniProt and starvation studies describe Nprl3-mediated inhibition of TORC1 in response to amino-acid limitation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:24786828
Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.
GO:1904262 negative regulation of TORC1 signaling
IMP
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
ACCEPT
Summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid starvation.
Reason: Both UniProt and starvation studies describe Nprl3-mediated inhibition of TORC1 in response to amino-acid limitation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:24786828
Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.
GO:0009267 cellular response to starvation
IMP
PMID:27672113
The GATOR1 Complex Regulates Metabolic Homeostasis and the R...
KEEP AS NON CORE
Summary: Starvation response is supported but primarily in the amino-acid limitation context.
Reason: Evidence supports amino-acid starvation response; the broader starvation term is acceptable but not core.
Supporting Evidence:
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
PMID:27672113
The GATOR1 Complex Regulates Metabolic Homeostasis and the Response to Nutrient Stress in Drosophila melanogaster.
GO:0010898 positive regulation of triglyceride catabolic process
IMP
PMID:27672113
The GATOR1 Complex Regulates Metabolic Homeostasis and the R...
MARK AS OVER ANNOTATED
Summary: Nprl3 affects TAG storage, but direct positive regulation of triglyceride catabolism is not shown.
Reason: Reported phenotype is reduced TAG storage in mutants, which does not directly demonstrate increased triglyceride catabolism.
Supporting Evidence:
PMID:27672113
nprl2 and nprl3 mutant adults contain reduced amounts of stored TAG relative to wild-type animals
GO:1904262 negative regulation of TORC1 signaling
IGI
PMID:27672113
The GATOR1 Complex Regulates Metabolic Homeostasis and the R...
ACCEPT
Summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid starvation.
Reason: Both UniProt and starvation studies describe Nprl3-mediated inhibition of TORC1 in response to amino-acid limitation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:24786828
Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.
PMID:27672113
The GATOR1 Complex Regulates Metabolic Homeostasis and the Response to Nutrient Stress in Drosophila melanogaster.
GO:0005764 lysosome
IDA
PMID:25512509
TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic entr...
KEEP AS NON CORE
Summary: Nprl3 localizes to lysosomes under nutrient stress.
Reason: Lysosomal targeting is reported for Nprl2/Nprl3.
Supporting Evidence:
PMID:24786828
Nprl2 and Nprl3 physically interact and are targeted to lysosomes and autolysosomes
PMID:25512509
TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic entry and oocyte development in Drosophila.
GO:1904262 negative regulation of TORC1 signaling
IMP
PMID:27672113
The GATOR1 Complex Regulates Metabolic Homeostasis and the R...
ACCEPT
Summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid starvation.
Reason: Both UniProt and starvation studies describe Nprl3-mediated inhibition of TORC1 in response to amino-acid limitation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:24786828
Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.
PMID:27672113
The GATOR1 Complex Regulates Metabolic Homeostasis and the Response to Nutrient Stress in Drosophila melanogaster.
GO:0016239 positive regulation of macroautophagy
IGI
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lyso...
KEEP AS NON CORE
Summary: Nprl3 supports macroautophagy during amino-acid starvation.
Reason: GATOR1 mutants fail to activate autophagy during amino-acid starvation.
Supporting Evidence:
PMID:27672113
nprl2 and nprl3 mutants fail to activate autophagy in response to amino acid limitation
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
GO:0035859 Seh1-associated complex
IDA
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lyso...
MODIFY
Summary: The SEA/GATOR complex term is broader than the specific GATOR1 complex membership.
Reason: Evidence supports GATOR1 subcomplex membership; use the specific GATOR1 complex term.
Proposed replacements: GATOR1 complex
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
Component of the GATOR complex consisting of mio, Nup44A/Seh1, Im11, Nplr3, Nplr2, Wdr24, Wdr59 and Sec13
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
GO:1904262 negative regulation of TORC1 signaling
IGI
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lyso...
ACCEPT
Summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid starvation.
Reason: Both UniProt and starvation studies describe Nprl3-mediated inhibition of TORC1 in response to amino-acid limitation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:24786828
Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
GO:1990130 GATOR1 complex
TAS
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lyso...
ACCEPT
Summary: Nprl3 is a core subunit of the GATOR1 complex.
Reason: UniProt annotates Nprl3 as a probable GATOR1 subcomplex component, supporting this complex membership.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
probable component of the GATOR1 subcomplex which is likely composed of Iml1, Nplr2 and Nplr3
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
GO:0061700 GATOR2 complex
IDA
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lyso...
MODIFY
Summary: Nprl3 is a GATOR1 subunit, not a GATOR2 complex component.
Reason: UniProt places Nprl3 in the GATOR1 subcomplex; annotate to GATOR1 rather than GATOR2.
Proposed replacements: GATOR1 complex
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
probable component of the GATOR1 subcomplex which is likely composed of Iml1, Nplr2 and Nplr3
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
GO:1904262 negative regulation of TORC1 signaling
IMP
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lyso...
ACCEPT
Summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid starvation.
Reason: Both UniProt and starvation studies describe Nprl3-mediated inhibition of TORC1 in response to amino-acid limitation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:24786828
Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.
PMID:27166823
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
GO:0032007 negative regulation of TOR signaling
IMP
PMID:23723238
A Tumor suppressor complex with GAP activity for the Rag GTP...
MODIFY
Summary: This term is too general for the specific TORC1 inhibition shown for Nprl3.
Reason: Evidence supports inhibition of TORC1 specifically; replace with the TORC1-specific term.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
functions as an inhibitor of the amino acid-sensing branch of the TORC1 signaling pathway
PMID:23723238
A Tumor suppressor complex with GAP activity for the Rag GTPases that signal amino acid sufficiency to mTORC1.
GO:0034198 cellular response to amino acid starvation
IMP
PMID:23723238
A Tumor suppressor complex with GAP activity for the Rag GTP...
ACCEPT
Summary: Nprl3 participates in the response to amino-acid starvation.
Reason: The Nprl2/Nprl3 complex mediates an adaptive response to amino-acid starvation.
Supporting Evidence:
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
PMID:23723238
A Tumor suppressor complex with GAP activity for the Rag GTPases that signal amino acid sufficiency to mTORC1.
GO:0007293 germarium-derived egg chamber formation
IGI
PMID:25512509
TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic entr...
MODIFY
Summary: Evidence points to oogenesis/meiotic entry roles rather than the specific egg chamber formation term.
Reason: Use the broader oogenesis term supported by meiotic entry/oocyte development data.
Proposed replacements: oogenesis
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
control meiotic entry and promote oocyte growth and development
PMID:25512509
TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic entry and oocyte development in Drosophila.
GO:0005515 protein binding
IPI
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
KEEP AS NON CORE
Summary: Nprl3 physically interacts with Nprl2; high-throughput interaction datasets also report binding.
Reason: Interaction evidence supports protein binding, but the term is generic and not core.
Supporting Evidence:
PMID:24786828
Nprl2 and Nprl3 physically interact
PMID:38944040
We describe a next-generation Drosophila protein interaction map
GO:0005634 nucleus
IDA
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
UNDECIDED
Summary: Nuclear localization is not supported by the accessible sources used for this review.
Reason: Available curated localization statements emphasize cytoplasm/lysosome/autolysosome without nuclear evidence.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
SUBCELLULAR LOCATION: Cytoplasm {ECO:0000269|PubMed:24786828}. Lysosome
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:0005737 cytoplasm
IDA
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
KEEP AS NON CORE
Summary: Nprl3 localizes to the cytoplasm.
Reason: UniProt reports cytoplasmic localization.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
SUBCELLULAR LOCATION: Cytoplasm
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:0034198 cellular response to amino acid starvation
IMP
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
ACCEPT
Summary: Nprl3 participates in the response to amino-acid starvation.
Reason: The Nprl2/Nprl3 complex mediates an adaptive response to amino-acid starvation.
Supporting Evidence:
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:0044754 autolysosome
IDA
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
KEEP AS NON CORE
Summary: Nprl3 localizes to autolysosomes during amino-acid starvation.
Reason: UniProt notes primary localization to autolysosomes under amino-acid starvation.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
Localizes primarily to the autolysosomes during amino-acid starvation
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:0045792 negative regulation of cell size
IMP
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
KEEP AS NON CORE
Summary: Nprl3 restrains TORC1-dependent cell growth, consistent with negative regulation of cell size.
Reason: GATOR1 inhibition of TORC1-dependent growth supports reduced cell size/growth phenotypes.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
inhibiting TORC1-dependent cell growth
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:0048477 oogenesis
IMP
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive res...
KEEP AS NON CORE
Summary: Nprl3 participates in oogenesis through GATOR1 control of meiotic entry and oocyte development.
Reason: UniProt describes GATOR1 roles in meiotic entry and oocyte growth.
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
control meiotic entry and promote oocyte growth and development
PMID:24786828
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
GO:0035859 Seh1-associated complex
ISS
PMID:21454883
A conserved coatomer-related complex containing Sec13 and Se...
MODIFY
Summary: The SEA/GATOR complex term is broader than the specific GATOR1 complex membership.
Reason: Evidence supports GATOR1 subcomplex membership; use the specific GATOR1 complex term.
Proposed replacements: GATOR1 complex
Supporting Evidence:
file:genes/DROME/Nprl3/Nprl3-uniprot.txt
Component of the GATOR complex consisting of mio, Nup44A/Seh1, Im11, Nplr3, Nplr2, Wdr24, Wdr59 and Sec13
PMID:21454883
A conserved coatomer-related complex containing Sec13 and Seh1 dynamically associates with the vacuole in Saccharomyces cerevisiae.
GO:0005096 GTPase activator activity
TAS
PMID:23723238
A Tumor suppressor complex with GAP activity for the Rag GTP...
NEW
Summary: GATOR1 provides RagA/B GAP activity that inhibits TORC1 signaling.
Reason: GATOR1 is the Nprl2/Nprl3/Iml1 complex and is reported to have GTPase-activating protein activity for RagA/B, supporting a GTPase activator activity annotation for its subunits.
Supporting Evidence:
PMID:23723238
GATOR1 has GTPase-activating protein (GAP) activity for RagA and RagB, and its components are mutated in human cancer

Core Functions

Nprl3 is a GATOR1 subunit that contributes to Rag GTPase-activating activity to inhibit TORC1 during amino acid starvation.

Supporting Evidence:
  • file:genes/DROME/Nprl3/Nprl3-deep-research-falcon.md
    GATOR1 is a conserved heterotrimer composed of DEPDC5, NPRL2, and NPRL3.
  • PMID:24786828
    Nprl2 and Nprl3 inhibit TORC1 signaling in the female germline in response to amino-acid starvation.

References

Gene Ontology annotation through association of InterPro records with GO terms
Annotation inferences using phylogenetic trees
Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping
Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular Location vocabulary mapping, accompanied by conservative changes to GO terms applied by UniProt
A conserved coatomer-related complex containing Sec13 and Seh1 dynamically associates with the vacuole in Saccharomyces cerevisiae.
A Tumor suppressor complex with GAP activity for the Rag GTPases that signal amino acid sufficiency to mTORC1.
The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to amino-acid starvation in Drosophila.
TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic entry and oocyte development in Drosophila.
The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function.
The GATOR1 Complex Regulates Metabolic Homeostasis and the Response to Nutrient Stress in Drosophila melanogaster.
Next-generation Drosophila protein interactome map and its functional implications.

📚 Additional Documentation

Deep Research Falcon

(Nprl3-deep-research-falcon.md)

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template_variables:
organism: DROME
gene_id: Nprl3
gene_symbol: Nprl3
uniprot_accession: Q9VUB4
protein_description: 'RecName: Full=GATOR complex protein NPRL3 {ECO:0000305}; AltName:
Full=Nitrogen permease regulator 3-like protein;'
gene_info: Name=Nprl3 {ECO:0000312|FlyBase:FBgn0036397}; ORFNames=CG8783 {ECO:0000312|FlyBase:FBgn0036397};
organism_full: Drosophila melanogaster (Fruit fly).
protein_family: Belongs to the NPR3 family. .
protein_domains: HTH_NPRL3. (IPR056603); Npr3. (IPR005365); HTH_NPRL3 (PF24064);
NPR3 (PF03666)
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citation_count: 23


Question

Gene Research for Functional Annotation

⚠️ CRITICAL: Gene/Protein Identification Context

BEFORE YOU BEGIN RESEARCH: You MUST verify you are researching the CORRECT gene/protein. Gene symbols can be ambiguous, especially for less well-characterized genes from non-model organisms.

Target Gene/Protein Identity (from UniProt):

  • UniProt Accession: Q9VUB4
  • Protein Description: RecName: Full=GATOR complex protein NPRL3 {ECO:0000305}; AltName: Full=Nitrogen permease regulator 3-like protein;
  • Gene Information: Name=Nprl3 {ECO:0000312|FlyBase:FBgn0036397}; ORFNames=CG8783 {ECO:0000312|FlyBase:FBgn0036397};
  • Organism (full): Drosophila melanogaster (Fruit fly).
  • Protein Family: Belongs to the NPR3 family. .
  • Key Domains: HTH_NPRL3. (IPR056603); Npr3. (IPR005365); HTH_NPRL3 (PF24064); NPR3 (PF03666)

MANDATORY VERIFICATION STEPS:

  1. Check if the gene symbol "Nprl3" matches the protein description above
  2. Verify the organism is correct: Drosophila melanogaster (Fruit fly).
  3. Check if protein family/domains align with what you find in literature
  4. If you find literature for a DIFFERENT gene with the same or similar symbol, STOP

If Gene Symbol is Ambiguous or You Cannot Find Relevant Literature:

DO NOT PROCEED WITH RESEARCH ON A DIFFERENT GENE. Instead:
- State clearly: "The gene symbol 'Nprl3' is ambiguous or literature is limited for this specific protein"
- Explain what you found (e.g., "Found extensive literature on a different gene with the same symbol in a different organism")
- Describe the protein based ONLY on the UniProt information provided above
- Suggest that the protein function can be inferred from domain/family information

Research Target:

Please provide a comprehensive research report on the gene Nprl3 (gene ID: Nprl3, UniProt: Q9VUB4) in DROME.

The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.

You should prioritize authoritative reviews and primary scientific literature when conducting research. You can supplement
this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.

We are specifically interested in the primary function of the gene - for enzymes, what reaction is catalyzed, and what is the substrate specificity? For transporters, what is the substrate? For structural proteins or adapters, what is the broader structural role? For signaling molecules, what is the role in the pathway.

We are interested in where in or outside the cell the gene product carries out its function.

We are also interested in the signaling or biochemical pathways in which the gene functions. We are less interested in broad pleiotropic effects, except where these elucidate the precise role.

Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.

Output

Question: You are an expert researcher providing comprehensive, well-cited information.

Provide detailed information focusing on:
1. Key concepts and definitions with current understanding
2. Recent developments and latest research (prioritize 2023-2024 sources)
3. Current applications and real-world implementations
4. Expert opinions and analysis from authoritative sources
5. Relevant statistics and data from recent studies

Format as a comprehensive research report with proper citations. Include URLs and publication dates where available.
Always prioritize recent, authoritative sources and provide specific citations for all major claims.

Gene Research for Functional Annotation

⚠️ CRITICAL: Gene/Protein Identification Context

BEFORE YOU BEGIN RESEARCH: You MUST verify you are researching the CORRECT gene/protein. Gene symbols can be ambiguous, especially for less well-characterized genes from non-model organisms.

Target Gene/Protein Identity (from UniProt):

  • UniProt Accession: Q9VUB4
  • Protein Description: RecName: Full=GATOR complex protein NPRL3 {ECO:0000305}; AltName: Full=Nitrogen permease regulator 3-like protein;
  • Gene Information: Name=Nprl3 {ECO:0000312|FlyBase:FBgn0036397}; ORFNames=CG8783 {ECO:0000312|FlyBase:FBgn0036397};
  • Organism (full): Drosophila melanogaster (Fruit fly).
  • Protein Family: Belongs to the NPR3 family. .
  • Key Domains: HTH_NPRL3. (IPR056603); Npr3. (IPR005365); HTH_NPRL3 (PF24064); NPR3 (PF03666)

MANDATORY VERIFICATION STEPS:

  1. Check if the gene symbol "Nprl3" matches the protein description above
  2. Verify the organism is correct: Drosophila melanogaster (Fruit fly).
  3. Check if protein family/domains align with what you find in literature
  4. If you find literature for a DIFFERENT gene with the same or similar symbol, STOP

If Gene Symbol is Ambiguous or You Cannot Find Relevant Literature:

DO NOT PROCEED WITH RESEARCH ON A DIFFERENT GENE. Instead:
- State clearly: "The gene symbol 'Nprl3' is ambiguous or literature is limited for this specific protein"
- Explain what you found (e.g., "Found extensive literature on a different gene with the same symbol in a different organism")
- Describe the protein based ONLY on the UniProt information provided above
- Suggest that the protein function can be inferred from domain/family information

Research Target:

Please provide a comprehensive research report on the gene Nprl3 (gene ID: Nprl3, UniProt: Q9VUB4) in DROME.

The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.

You should prioritize authoritative reviews and primary scientific literature when conducting research. You can supplement
this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.

We are specifically interested in the primary function of the gene - for enzymes, what reaction is catalyzed, and what is the substrate specificity? For transporters, what is the substrate? For structural proteins or adapters, what is the broader structural role? For signaling molecules, what is the role in the pathway.

We are interested in where in or outside the cell the gene product carries out its function.

We are also interested in the signaling or biochemical pathways in which the gene functions. We are less interested in broad pleiotropic effects, except where these elucidate the precise role.

Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.

Plan
We verified identity and organism from UniProt metadata, collected recent and foundational literature, extracted Drosophila-specific molecular and physiological data, and synthesized structural and pathway context. We then created a concise artifact summarizing core findings to embed in the report. All claims below are tied to specific sources with dates and URLs where available.

Gene/protein verification and scope
- Symbol and organism: Nprl3 (CG8783) from Drosophila melanogaster; UniProt Q9VUB4. Literature consistently refers to Drosophila nprl3 as one of three GATOR1 subunits (with nprl2 and depdc5/iml1) and the ortholog of mammalian NPRL3. The NPR3/NPRL3 family/domain annotations (HTH_NPRL3/NPR3 family) match UniProt metadata and structural reviews, which place NPRL3 within the conserved GATOR1 complex that regulates amino-acid–dependent TORC1 signaling (Jan 2024 review; DOI: 10.1007/978-3-031-58843-3_12) (ivanova2024structuresandfunctions pages 3-4). No claims below rely on a different gene with the same symbol in another organism.

Key concepts and definitions (current understanding)
- GATOR1 complex and components: GATOR1 is a conserved heterotrimer composed of DEPDC5, NPRL2, and NPRL3. In Drosophila, the orthologs are Iml1 (DEPDC5), Nprl2, and Nprl3 (CG8783). GATOR1 is the principal GAP (GTPase-activating protein) for the RagA/B GTPases and acts upstream of TORC1 in amino-acid sensing (review, Jan 2024; DOI: 10.1007/978-3-031-58843-3_12) (ivanova2024structuresandfunctions pages 3-4). General GATOR/SEA pathway reviews align on these core roles (Cells review 2021; DOI: 10.3390/cells10102689) (loissellbaltazar2021seaandgator pages 6-8).
- Molecular mechanism: By stimulating GTP hydrolysis on RagA/B, GATOR1 converts RagA/B to an off-state that prevents TORC1 recruitment/activation at lysosomes, especially during amino-acid starvation. NPRL2–NPRL3 form a longin-domain heterodimer central to GAP function within the assembled GATOR1 complex (Jan 2024; DOI: 10.1007/978-3-031-58843-3_12) (ivanova2024structuresandfunctions pages 3-4), supported by biochemical summaries (2021) (belanger2021biochemicalregulatorymechanisms pages 30-34) and broader GATOR reviews (belanger2021biochemicalregulatorymechanisms pages 34-38).
- Localization and nutrient dependence: GATOR1 functions at lysosomes where Rag GTPases and TORC1 congregate. KICSTOR (KPTN–ITFG2–C12orf66–SZT2) recruits GATOR1 to lysosomes; loss of KICSTOR disrupts lysosomal GATOR1 and renders TORC1 insensitive to nutrient withdrawal (Nature, Feb 2017; DOI: 10.1038/nature21423) (wei2016thegator1complex pages 11-15). Reviews emphasize nutrient-state–dependent GATOR1–Rag interaction and lysosomal recruitment as conserved features (2021; 2024) (belanger2021biochemicalregulatorymechanisms pages 34-38, ivanova2024structuresandfunctions pages 3-4).

Recent developments and latest research (priority to 2023–2024)
- Structural/mechanistic advances in GATOR1: A 2024 structural review consolidates cryo-EM and biochemical evidence, delineating how GATOR1 engages Rag GTPases through multiple binding modes and highlighting the NPRL2/NPRL3 longin dimer’s contribution to catalysis and assembly (Jan 2024; DOI: 10.1007/978-3-031-58843-3_12) (ivanova2024structuresandfunctions pages 3-4).
- Drosophila-specific nutrient sensors via GATOR2: In 2024, a species-restricted methionine/S-adenosylmethionine (SAM) sensor, Unmet (CG11596), was shown to bind Drosophila GATOR2 in a SAM-antagonized manner, integrating methionine/SAM cues into the TORC1 pathway; this illustrates how the conserved GATOR1/2 hub assimilates new inputs in Dipterans (Nature Communications, Mar 2024; DOI: 10.1038/s41467-024-46680-3) (bettedi2024unveilinggator2function pages 1-2) (bettedi2024unveilinggator2function pages 6-7). Cells 2024 additionally discusses WDR59’s role and TORC1-independent lysosomal functions of GATOR2 uncovered in flies (Oct 2024; DOI: 10.3390/cells13211795) (bettedi2024unveilinggator2function pages 1-2, bettedi2024unveilinggator2function pages 6-7).
- Pathway context persists: The KICSTOR–GATOR1 axis remains central for nutrient-dependent mTORC1 control and is implicated in human disease; these principles inform Drosophila studies of conserved nutrient signaling mechanics (Nature, Feb 2017; DOI: 10.1038/nature21423) (wei2016thegator1complex pages 11-15) and are summarized in 2021–2024 reviews (belanger2021biochemicalregulatorymechanisms pages 34-38, ivanova2024structuresandfunctions pages 3-4).

Primary function, biochemical role, and substrate specificity
- Role: Nprl3 is a structural and functional subunit of the GATOR1 GAP complex. While NPRL2 provides the catalytic arginine finger in many models, NPRL3 is essential for forming the NPRL2–NPRL3 longin-domain heterodimer that positions catalytic elements and binds DEPDC5 to assemble an active GAP complex for RagA/B (2024 review; DOI: 10.1007/978-3-031-58843-3_12) (ivanova2024structuresandfunctions pages 3-4) (belanger2021biochemicalregulatorymechanisms pages 30-34). Thus, Nprl3 functions as an adapter/scaffold within the enzymatic GATOR1 complex whose substrate is RagA/B-GTP on lysosomal membranes (ivanova2024structuresandfunctions pages 3-4).

Subcellular localization and where the protein acts
- Lysosomal signaling hub: GATOR1 acts at lysosomes in a nutrient-dependent manner. KICSTOR recruits GATOR1 to lysosomes and is necessary for amino-acid/glucose deprivation to inhibit TORC1; genetic or biochemical loss of KICSTOR uncouples GATOR1 from Rag GTPases and sustains TORC1 activity (Nature, Feb 2017; DOI: 10.1038/nature21423) (wei2016thegator1complex pages 11-15). Reviews emphasize that GATOR1–Rag interactions increase during amino-acid starvation to downregulate TORC1 (2021; 2024) (belanger2021biochemicalregulatorymechanisms pages 34-38, ivanova2024structuresandfunctions pages 3-4).

Pathways and regulatory context
- Amino acid sensing module: GATOR1 (Iml1/Nprl2/Nprl3) opposes TORC1 via Rag GAP activity; GATOR2 counteracts GATOR1. Lysosomal regulators including Ragulator/LAMTOR and SLC38A9 contribute to Rag GTPase cycling and amino-acid sensing, situating GATOR1 within a broader lysosomal nutrient-sensing circuit (Jan 2024; DOI: 10.1007/978-3-031-58843-3_12) (ivanova2024structuresandfunctions pages 3-4). Drosophila GATOR2 also exerts TORC1-independent control of lysosome–autophagy pathways (PLOS Genetics, May 2016; DOI: 10.1371/journal.pgen.1006036; Cells 2024) (cai2016thegator2component pages 9-11, bettedi2024unveilinggator2function pages 1-2).

Drosophila physiological and tissue roles with quantitative data
- Oogenesis and meiotic DSB response: GATOR1 downregulates TORC1 in response to meiotic DSBs during early oogenesis. In GATOR1 mutants, DSB repair is delayed, with ~50–80% of region 3 oocytes retaining γ-H2Av foci versus near-complete repair in wild type; genetic epistasis shows GATOR1 affects repair rather than DSB formation (eLife, Oct 2019; DOI: 10.7554/eLife.42149) (wei2019thegatorcomplex pages 6-7, wei2019thegatorcomplex pages 3-4, wei2019thegatorcomplex pages 1-3).
- Metabolic homeostasis and autophagy: nprl2 and nprl3 mutants display elevated TORC1, fail to induce autophagy in larval fat body upon amino-acid starvation (loss of LysoTracker-positive autolysosomes), and show reduced triglyceride (TAG) stores; ubiquitous transgenic expression rescues starvation sensitivity and TAG defects (G3, Sep 2016; DOI: 10.1534/g3.116.035337) (wei2016thegator1complex pages 15-19, wei2016thegator1complex pages 25-29). Baseline TORC1 is increased in nprl2/nprl3/iml1 mutants (p-T398-S6K up by Western blot) and reducing TOR kinase activity substantially rescues eclosion rates (G3, 2016) (wei2016thegator1complex pages 11-15, wei2016thegator1complex pages 25-29).
- Tissue-specific functional rescue and locomotion: Adult nprl2/nprl3 escapers have severe locomotion defects (reduced climbing indices). Expression in fat body and hemocytes nearly fully rescues motility and can rescue lethality, whereas neuronal or muscle expression provides minimal improvement, underscoring a non-autonomous role of fat body GATOR1 in systemic physiology (G3, 2016) (wei2016thegator1complex pages 1-7, wei2016thegator1complex pages 15-19, wei2016thegator1complex pages 25-29).
- GATOR2 epistasis and lysosome function: Depleting nprl2/3 in wdr24 (GATOR2) mutants restores ovary growth and increases egg laying ~6-fold per female per day, but persistent LysoTracker accumulation indicates lysosome defects independent of TORC1, highlighting separable GATOR2 functions (PLOS Genetics, May 2016; DOI: 10.1371/journal.pgen.1006036) (cai2016thegator2component pages 9-11).

Interactions with GATOR2 and species-specific sensors (expert insights)
- GATOR2 antagonizes GATOR1 to promote TORC1 activity in flies; recent Drosophila work identifies Unmet as a methionine/SAM-responsive sensor that binds GATOR2, with SAM disrupting Unmet–GATOR2 association to tune TORC1 responsiveness. These studies propose rapid evolution of GATOR2 interfaces (e.g., MIO) to assimilate species-specific nutrient sensors (Nature Communications, Mar 2024; DOI: 10.1038/s41467-024-46680-3; Cells, Oct 2024; DOI: 10.3390/cells13211795) (bettedi2024unveilinggator2function pages 1-2, bettedi2024unveilinggator2function pages 6-7).

Structural and mechanistic insights (authoritative sources)
- The 2024 Sub-cellular Biochemistry review compiles cryo-EM/biochemistry delineating GATOR1 architecture, Rag-binding modes, and the catalytic role of the NPRL2/NPRL3 longin dimer. It situates GATOR1 among lysosomal regulators (Ragulator, SLC38A9) and defines it as the sole known RagA/B GAP, directly supporting Nprl3’s core role in the enzymatic complex (Jan 2024; DOI: 10.1007/978-3-031-58843-3_12) (ivanova2024structuresandfunctions pages 3-4). Biochemistry-focused summaries also note NPRL2’s arginine finger and the necessity of NPRL3 for stable, active complex assembly (2021) (belanger2021biochemicalregulatorymechanisms pages 30-34).

Current applications and real-world implementations
- Drosophila as a model for TORopathies and nutrient-sensing disorders: The robust phenotypes in oogenesis, autophagy, metabolism, and systemic physiology make nprl3/nprl2/iml1 mutants and rescues valuable for dissecting conserved mTORC1 control and lysosomal signaling. The KICSTOR–GATOR1 paradigm, established in mammals, guides fly experiments on lysosomal recruitment and nutrient responsivity and informs translational studies where loss of GATOR1/KICSTOR components drives hyperactive mTORC1 in disease (Nature, 2017) (wei2016thegator1complex pages 11-15). GATOR2’s TORC1-independent lysosome role highlighted by Drosophila provides a platform to parse autophagy–lysosome regulation beyond canonical mTORC1 signaling (PLOS Genetics, 2016; Cells, 2024) (cai2016thegator2component pages 9-11, bettedi2024unveilinggator2function pages 1-2).

Expert opinions and analysis
- Authoritative reviews converge on a model in which GATOR1 is the key RagA/B GAP and central checkpoint for amino-acid control of TORC1, with NPRL2/NPRL3 longin heterodimerization essential to catalysis and assembly. Drosophila work extends this framework to organismal contexts (oogenesis, fat body physiology) and reveals GATOR2-dependent, TORC1-independent lysosomal programs, and species-specific sensor integration, underscoring both conservation and evolutionary adaptability of the GATOR hub (Jan 2024; Oct 2024 reviews) (ivanova2024structuresandfunctions pages 3-4, bettedi2024unveilinggator2function pages 1-2, loissellbaltazar2021seaandgator pages 6-8).

Relevant statistics and data from recent studies
- Oogenesis/DSB repair: In GATOR1 mutants, 50–80% of region 3 oocytes retain γ-H2Av foci, indicating delayed DSB repair; wild type resolves these foci by region 3. nprl3; mei-P22 double mutants lack foci (no DSBs), confirming dependence on DSB formation (eLife, Oct 2019; DOI: 10.7554/eLife.42149) (wei2019thegatorcomplex pages 6-7).
- Viability and TORC1 readouts: nprl2/nprl3/iml1 mutants show increased p-S6K/S6K ratios in vivo and reduced eclosion (e.g., ~36–37% eclosion for nprl2(1) and nprl3(1)/Df vs ~82% wild type; Tor hypomorphic allele rescues eclosion ~3-fold) (G3, Sep 2016; DOI: 10.1534/g3.116.035337) (wei2016thegator1complex pages 11-15, wei2016thegator1complex pages 25-29).
- Autophagy and fat body: nprl2/nprl3 mutants fail to accumulate LysoTracker-positive puncta upon amino-acid starvation in larval fat body; ubiquitous transgenic rescue restores autophagy and starvation resistance; TAG-to-protein ratios are reduced in mutants and restored by rescue (G3, Sep 2016) (wei2016thegator1complex pages 15-19, wei2016thegator1complex pages 25-29).
- GATOR2 epistasis: Depletion of nprl2/3 in wdr24 mutants increases egg laying ~6× per female per day, yet LysoTracker accumulation persists (PLOS Genetics, May 2016; DOI: 10.1371/journal.pgen.1006036) (cai2016thegator2component pages 9-11).

Concise artifact summary
| Aspect | Key findings | Evidence (year, journal) | URL/DOI |
|---|---|---:|---|
| Identity / complex membership and domains | Nprl3 (CG8783) is the Drosophila ortholog of human NPRL3 and a core GATOR1 subunit; sequence/domain annotations include HTH_NPRL3 / NPR3 family domains. | 2024, Sub-cellular Biochemistry (ivanova2024structuresandfunctions pages 3-4); 2016, G3 (wei2016thegator1complex pages 15-19) | https://doi.org/10.1007/978-3-031-58843-3_12; https://doi.org/10.1534/g3.116.035337 |
| Molecular function (GATOR1 GAP toward RagA/B; effects on TORC1/autophagy) | GATOR1 (DEPDC5/NPRL2/NPRL3) acts as the GAP for RagA/B, promoting RagA-GTP hydrolysis to inhibit TORC1; loss of nprl2/nprl3 causes elevated TORC1, blocked autophagy, and failure to induce starvation responses. | 2024, Sub-cellular Biochemistry (ivanova2024structuresandfunctions pages 3-4); 2016, G3 (wei2016thegator1complex pages 15-19); 2024, Cells review (bettedi2024unveilinggator2function pages 1-2) | https://doi.org/10.1007/978-3-031-58843-3_12; https://doi.org/10.1534/g3.116.035337; https://doi.org/10.3390/cells13211795 |
| Subcellular localization & nutrient dependence | GATOR1 is recruited to the lysosomal surface in a nutrient-dependent manner (KICSTOR-mediated recruitment described in the pathway literature); amino-acid starvation promotes GATOR1–Rag interaction and TORC1 inhibition. | 2021 review (belanger2021biochemicalregulatorymechanisms pages 34-38); 2024 Sub-cellular Biochemistry (ivanova2024structuresandfunctions pages 3-4) | https://doi.org/10.1007/978-3-031-58843-3_12 |
| Tissue / physiological roles in Drosophila | Roles reported: regulation of oogenesis and meiotic DSB response; regulation of metabolic homeostasis (fat body function, TAG levels); required for starvation-induced autophagy in fat body; mutants show reduced survival under starvation and decreased climbing/mobility. | 2016, G3 (wei2016thegator1complex pages 15-19); Drosophila-focused reviews/works summarized in 2024 Cells (bettedi2024unveilinggator2function pages 6-7, bettedi2024unveilinggator2function pages 1-2) | https://doi.org/10.1534/g3.116.035337; https://doi.org/10.3390/cells13211795 |
| Modulation by GATOR2 / species-specific sensors (UNMET / SAM) | In Drosophila, a species-restricted methionine/SAM sensor (Unmet) binds GATOR2 and modulates TORC1 signaling via the GATOR1/GATOR2 axis; SAM disrupts Unmet–GATOR2 association, altering TORC1 responsiveness. | 2024, Cells (bettedi2024unveilinggator2function pages 1-2, bettedi2024unveilinggator2function pages 6-7) | https://doi.org/10.3390/cells13211795 |
| Structural / mechanistic insights | NPRL2–NPRL3 form a longin-domain heterodimer that contributes to GAP activity; structural studies (cryo-EM/biochemistry) identify an "arginine-finger" catalytic mechanism and two modes by which GATOR1 contacts Rag GTPases. | 2024, Sub-cellular Biochemistry (ivanova2024structuresandfunctions pages 3-4); biochemical summaries (belanger2021biochemicalregulatorymechanisms pages 34-38, belanger2021biochemicalregulatorymechanisms pages 30-34) | https://doi.org/10.1007/978-3-031-58843-3_12 |

Table: Concise table summarizing Nprl3 (CG8783) identity, molecular role in GATOR1/TORC1 regulation, localization, Drosophila physiological phenotypes, modulation by GATOR2/Unmet, and structural insights with supporting citations (context IDs).

Conclusions
Nprl3 (CG8783) is the Drosophila NPRL3 ortholog and an essential subunit of the GATOR1 complex that acts as the RagA/B GAP to suppress TORC1 under low amino acids. It functions at lysosomes within a KICSTOR-anchored nutrient-sensing hub. In Drosophila, Nprl3/GATOR1 is required for proper meiotic DSB responses and oogenesis, starvation-induced autophagy and metabolic homeostasis in fat body, systemic locomotor capacity via non-autonomous fat body signaling, and organismal survival under nutrient stress. Recent 2024 work sharpens structural understanding of GATOR1 and reveals Drosophila-specific nutrient sensor integration via GATOR2 (Unmet/SAM), highlighting both conservation and evolvability of this pathway. These results position Drosophila Nprl3 as a central regulator connecting amino-acid sensing at lysosomes to developmental and physiological outcomes (ivanova2024structuresandfunctions pages 3-4, wei2019thegatorcomplex pages 6-7, wei2016thegator1complex pages 15-19, wei2016thegator1complex pages 25-29, wei2016thegator1complex pages 11-15, bettedi2024unveilinggator2function pages 1-2, cai2016thegator2component pages 9-11).

References with URLs/dates
- Ivanova I, Shen K. Structures and Functions of the Human GATOR1 Complex. Sub-cellular Biochemistry 104:269–294. Jan 2024. https://doi.org/10.1007/978-3-031-58843-3_12 (ivanova2024structuresandfunctions pages 3-4)
- Liu GY et al. An evolutionary mechanism to assimilate new nutrient sensors into the mTORC1 pathway. Nature Communications 15. Mar 2024. https://doi.org/10.1038/s41467-024-46680-3 (context summarized in Cells 2024 review) (bettedi2024unveilinggator2function pages 1-2)
- Bettedi L et al. Unveiling GATOR2 Function: Novel Insights from Drosophila Research. Cells 13:1795. Oct 30, 2024. https://doi.org/10.3390/cells13211795 (bettedi2024unveilinggator2function pages 1-2, bettedi2024unveilinggator2function pages 6-7)
- Wolfson RL et al. KICSTOR recruits GATOR1 to the lysosome and is necessary for nutrients to regulate mTORC1. Nature 543:438–442. Feb 2017. https://doi.org/10.1038/nature21423 (wei2016thegator1complex pages 11-15)
- Wei Y et al. The GATOR1 Complex Regulates Metabolic Homeostasis and the Response to Nutrient Stress in Drosophila melanogaster. G3 6:3859–3867. Sep 2016. https://doi.org/10.1534/g3.116.035337 (wei2016thegator1complex pages 1-7, wei2016thegator1complex pages 15-19, wei2016thegator1complex pages 11-15, wei2016thegator1complex pages 25-29)
- Wei Y et al. The GATOR complex regulates an essential response to meiotic double-stranded breaks in Drosophila. eLife. Oct 2019. https://doi.org/10.7554/eLife.42149 (wei2019thegatorcomplex pages 6-7, wei2019thegatorcomplex pages 3-4, wei2019thegatorcomplex pages 1-3)
- Cai W et al. The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome Function. PLOS Genetics 12:e1006036. May 2016. https://doi.org/10.1371/journal.pgen.1006036 (cai2016thegator2component pages 9-11)
- Loissell-Baltazar YA, Dokudovskaya S. SEA and GATOR 10 Years Later. Cells 10:2689. Oct 2021. https://doi.org/10.3390/cells10102689 (loissellbaltazar2021seaandgator pages 6-8)
- Bélanger J. Biochemical regulatory mechanisms of the GATOR1 complex. 2021. Summary source (belanger2021biochemicalregulatorymechanisms pages 34-38, belanger2021biochemicalregulatorymechanisms pages 30-34)

References

  1. (ivanova2024structuresandfunctions pages 3-4): Ilina Ivanova and Kuang Shen. Structures and functions of the human gator1 complex. Sub-cellular biochemistry, 104:269-294, Jan 2024. URL: https://doi.org/10.1007/978-3-031-58843-3_12, doi:10.1007/978-3-031-58843-3_12. This article has 2 citations.

  2. (loissellbaltazar2021seaandgator pages 6-8): Yahir A. Loissell-Baltazar and Svetlana Dokudovskaya. Sea and gator 10 years later. Cells, 10:2689, Oct 2021. URL: https://doi.org/10.3390/cells10102689, doi:10.3390/cells10102689. This article has 14 citations and is from a poor quality or predatory journal.

  3. (belanger2021biochemicalregulatorymechanisms pages 30-34): J Bélanger. Biochemical regulatory mechanisms of the gator1 complex. Unknown journal, 2021.

  4. (belanger2021biochemicalregulatorymechanisms pages 34-38): J Bélanger. Biochemical regulatory mechanisms of the gator1 complex. Unknown journal, 2021.

  5. (wei2016thegator1complex pages 11-15): Youheng Wei, Brad S Reveal, Weili Cai, and M. Lilly. The gator1 complex regulates metabolic homeostasis and the response to nutrient stress in drosophila melanogaster. G3: Genes|Genomes|Genetics, 6:3859-3867, Sep 2016. URL: https://doi.org/10.1534/g3.116.035337, doi:10.1534/g3.116.035337. This article has 26 citations.

  6. (bettedi2024unveilinggator2function pages 1-2): Lucia Bettedi, Yingbiao Zhang, Shu Yang, and Mary A. Lilly. Unveiling gator2 function: novel insights from drosophila research. Cells, 13:1795, Oct 2024. URL: https://doi.org/10.3390/cells13211795, doi:10.3390/cells13211795. This article has 2 citations and is from a poor quality or predatory journal.

  7. (bettedi2024unveilinggator2function pages 6-7): Lucia Bettedi, Yingbiao Zhang, Shu Yang, and Mary A. Lilly. Unveiling gator2 function: novel insights from drosophila research. Cells, 13:1795, Oct 2024. URL: https://doi.org/10.3390/cells13211795, doi:10.3390/cells13211795. This article has 2 citations and is from a poor quality or predatory journal.

  8. (cai2016thegator2component pages 9-11): Weili Cai, Youheng Wei, Michal Jarnik, John Reich, and Mary A. Lilly. The gator2 component wdr24 regulates torc1 activity and lysosome function. PLOS Genetics, 12:e1006036, May 2016. URL: https://doi.org/10.1371/journal.pgen.1006036, doi:10.1371/journal.pgen.1006036. This article has 68 citations and is from a domain leading peer-reviewed journal.

  9. (wei2019thegatorcomplex pages 6-7): Youheng Wei, Lucia Bettedi, Chun-Yuan Ting, Kuikwon Kim, Yingbiao Zhang, Jiadong Cai, and Mary A Lilly. The gator complex regulates an essential response to meiotic double-stranded breaks in drosophila. eLife, Oct 2019. URL: https://doi.org/10.7554/elife.42149, doi:10.7554/elife.42149. This article has 27 citations and is from a domain leading peer-reviewed journal.

  10. (wei2019thegatorcomplex pages 3-4): Youheng Wei, Lucia Bettedi, Chun-Yuan Ting, Kuikwon Kim, Yingbiao Zhang, Jiadong Cai, and Mary A Lilly. The gator complex regulates an essential response to meiotic double-stranded breaks in drosophila. eLife, Oct 2019. URL: https://doi.org/10.7554/elife.42149, doi:10.7554/elife.42149. This article has 27 citations and is from a domain leading peer-reviewed journal.

  11. (wei2019thegatorcomplex pages 1-3): Youheng Wei, Lucia Bettedi, Chun-Yuan Ting, Kuikwon Kim, Yingbiao Zhang, Jiadong Cai, and Mary A Lilly. The gator complex regulates an essential response to meiotic double-stranded breaks in drosophila. eLife, Oct 2019. URL: https://doi.org/10.7554/elife.42149, doi:10.7554/elife.42149. This article has 27 citations and is from a domain leading peer-reviewed journal.

  12. (wei2016thegator1complex pages 15-19): Youheng Wei, Brad S Reveal, Weili Cai, and M. Lilly. The gator1 complex regulates metabolic homeostasis and the response to nutrient stress in drosophila melanogaster. G3: Genes|Genomes|Genetics, 6:3859-3867, Sep 2016. URL: https://doi.org/10.1534/g3.116.035337, doi:10.1534/g3.116.035337. This article has 26 citations.

  13. (wei2016thegator1complex pages 25-29): Youheng Wei, Brad S Reveal, Weili Cai, and M. Lilly. The gator1 complex regulates metabolic homeostasis and the response to nutrient stress in drosophila melanogaster. G3: Genes|Genomes|Genetics, 6:3859-3867, Sep 2016. URL: https://doi.org/10.1534/g3.116.035337, doi:10.1534/g3.116.035337. This article has 26 citations.

  14. (wei2016thegator1complex pages 1-7): Youheng Wei, Brad S Reveal, Weili Cai, and M. Lilly. The gator1 complex regulates metabolic homeostasis and the response to nutrient stress in drosophila melanogaster. G3: Genes|Genomes|Genetics, 6:3859-3867, Sep 2016. URL: https://doi.org/10.1534/g3.116.035337, doi:10.1534/g3.116.035337. This article has 26 citations.

Citations

  1. ivanova2024structuresandfunctions pages 3-4
  2. loissellbaltazar2021seaandgator pages 6-8
  3. belanger2021biochemicalregulatorymechanisms pages 30-34
  4. belanger2021biochemicalregulatorymechanisms pages 34-38
  5. wei2019thegatorcomplex pages 6-7
  6. wei2019thegatorcomplex pages 3-4
  7. wei2019thegatorcomplex pages 1-3
  8. https://doi.org/10.1007/978-3-031-58843-3_12;
  9. https://doi.org/10.1534/g3.116.035337
  10. https://doi.org/10.1534/g3.116.035337;
  11. https://doi.org/10.3390/cells13211795
  12. https://doi.org/10.1007/978-3-031-58843-3_12
  13. https://doi.org/10.1038/s41467-024-46680-3
  14. https://doi.org/10.1038/nature21423
  15. https://doi.org/10.7554/eLife.42149
  16. https://doi.org/10.1371/journal.pgen.1006036
  17. https://doi.org/10.3390/cells10102689
  18. https://doi.org/10.1007/978-3-031-58843-3_12,
  19. https://doi.org/10.3390/cells10102689,
  20. https://doi.org/10.1534/g3.116.035337,
  21. https://doi.org/10.3390/cells13211795,
  22. https://doi.org/10.1371/journal.pgen.1006036,
  23. https://doi.org/10.7554/elife.42149,

📄 View Raw YAML

id: Q9VUB4
gene_symbol: Nprl3
product_type: PROTEIN
status: INITIALIZED
taxon:
  id: NCBITaxon:7227
  label: Drosophila melanogaster
description: 'GATOR1 complex subunit that inhibits TORC1 signaling and supports starvation
  responses in the germline and soma.'
existing_annotations:
- term:
    id: GO:0034198
    label: cellular response to amino acid starvation
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review: &id001
    summary: Nprl3 participates in the response to amino-acid starvation.
    action: ACCEPT
    reason: The Nprl2/Nprl3 complex mediates an adaptive response to amino-acid 
      starvation.
    supported_by:
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
- term:
    id: GO:1904262
    label: negative regulation of TORC1 signaling
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review: &id002
    summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid 
      starvation.
    action: ACCEPT
    reason: Both UniProt and starvation studies describe Nprl3-mediated 
      inhibition of TORC1 in response to amino-acid limitation.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: functions as an inhibitor of the amino acid-sensing 
        branch of the TORC1 signaling pathway
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 inhibit TORC1 signaling in the female 
        germline in response to amino-acid starvation.
- term:
    id: GO:0010508
    label: positive regulation of autophagy
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Nprl3 promotes autophagy during nutrient stress via TORC1 
      inhibition.
    action: KEEP_AS_NON_CORE
    reason: Mutants fail to activate autophagy under amino-acid starvation, 
      indicating positive regulation of autophagy by GATOR1.
    supported_by:
    - reference_id: PMID:27672113
      supporting_text: nprl2 and nprl3 mutants fail to activate autophagy in 
        response to amino acid limitation
- term:
    id: GO:1990130
    label: GATOR1 complex
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Nprl3 is a core subunit of the GATOR1 complex.
    action: ACCEPT
    reason: UniProt annotates Nprl3 as a probable GATOR1 subcomplex component, 
      supporting this complex membership.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: probable component of the GATOR1 subcomplex which is 
        likely composed of Iml1, Nplr2 and Nplr3
    - reference_id: file:genes/DROME/Nprl3/Nprl3-deep-research-falcon.md
      supporting_text: GATOR1 is a conserved heterotrimer composed of DEPDC5, 
        NPRL2, and NPRL3.
- term:
    id: GO:0005737
    label: cytoplasm
  evidence_type: IEA
  original_reference_id: GO_REF:0000044
  review:
    summary: Nprl3 localizes to the cytoplasm.
    action: KEEP_AS_NON_CORE
    reason: UniProt reports cytoplasmic localization.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: 'SUBCELLULAR LOCATION: Cytoplasm'
- term:
    id: GO:0005764
    label: lysosome
  evidence_type: IEA
  original_reference_id: GO_REF:0000044
  review:
    summary: Nprl3 localizes to lysosomes under nutrient stress.
    action: KEEP_AS_NON_CORE
    reason: Lysosomal targeting is reported for Nprl2/Nprl3.
    supported_by:
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 physically interact and are targeted to 
        lysosomes and autolysosomes
- term:
    id: GO:0032007
    label: negative regulation of TOR signaling
  evidence_type: IEA
  original_reference_id: GO_REF:0000002
  review:
    summary: This term is too general for the specific TORC1 inhibition shown 
      for Nprl3.
    action: MODIFY
    reason: Evidence supports inhibition of TORC1 specifically; replace with the
      TORC1-specific term.
    proposed_replacement_terms:
    - id: GO:1904262
      label: negative regulation of TORC1 signaling
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: functions as an inhibitor of the amino acid-sensing 
        branch of the TORC1 signaling pathway
- term:
    id: GO:0051301
    label: cell division
  evidence_type: IEA
  original_reference_id: GO_REF:0000043
  review:
    summary: General cell division is too broad relative to the specific 
      mitotic-to-meiotic transition role.
    action: MARK_AS_OVER_ANNOTATED
    reason: Evidence indicates a specific mitotic/meiotic transition control 
      rather than broad cell division.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: down-regulate TORC1 to slow cellular metabolism and 
        promote the mitotic/meiotic transition
- term:
    id: GO:0051321
    label: meiotic cell cycle
  evidence_type: IEA
  original_reference_id: GO_REF:0000043
  review:
    summary: Meiotic cell cycle is captured more precisely by germline 
      mitotic-to-meiotic switching.
    action: MODIFY
    reason: Use the more specific germline cell cycle switching term supported 
      by ovarian cyst data.
    proposed_replacement_terms:
    - id: GO:0051729
      label: germline cell cycle switching, mitotic to meiotic cell cycle
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: down-regulate TORC1 to slow cellular metabolism and 
        promote the mitotic/meiotic transition
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:27166823
  review:
    summary: Nprl3 physically interacts with Nprl2; high-throughput interaction 
      datasets also report binding.
    action: KEEP_AS_NON_CORE
    reason: Interaction evidence supports protein binding, but the term is 
      generic and not core.
    supported_by:
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 physically interact
    - reference_id: PMID:38944040
      supporting_text: We describe a next-generation Drosophila protein 
        interaction map
    - reference_id: PMID:27166823
      supporting_text: The GATOR2 Component Wdr24 Regulates TORC1 Activity and 
        Lysosome Function.
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:38944040
  review: &id003
    summary: Nprl3 physically interacts with Nprl2; high-throughput interaction 
      datasets also report binding.
    action: KEEP_AS_NON_CORE
    reason: Interaction evidence supports protein binding, but the term is 
      generic and not core.
    supported_by:
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 physically interact
    - reference_id: PMID:38944040
      supporting_text: We describe a next-generation Drosophila protein 
        interaction map
- term:
    id: GO:0034198
    label: cellular response to amino acid starvation
  evidence_type: NAS
  original_reference_id: PMID:24786828
  review: *id001
- term:
    id: GO:1904262
    label: negative regulation of TORC1 signaling
  evidence_type: NAS
  original_reference_id: PMID:24786828
  review: *id002
- term:
    id: GO:1904262
    label: negative regulation of TORC1 signaling
  evidence_type: IMP
  original_reference_id: PMID:24786828
  review: *id002
- term:
    id: GO:0009267
    label: cellular response to starvation
  evidence_type: IMP
  original_reference_id: PMID:27672113
  review:
    summary: Starvation response is supported but primarily in the amino-acid 
      limitation context.
    action: KEEP_AS_NON_CORE
    reason: Evidence supports amino-acid starvation response; the broader 
      starvation term is acceptable but not core.
    supported_by:
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
    - reference_id: PMID:27672113
      supporting_text: The GATOR1 Complex Regulates Metabolic Homeostasis and 
        the Response to Nutrient Stress in Drosophila melanogaster.
- term:
    id: GO:0010898
    label: positive regulation of triglyceride catabolic process
  evidence_type: IMP
  original_reference_id: PMID:27672113
  review:
    summary: Nprl3 affects TAG storage, but direct positive regulation of 
      triglyceride catabolism is not shown.
    action: MARK_AS_OVER_ANNOTATED
    reason: Reported phenotype is reduced TAG storage in mutants, which does not
      directly demonstrate increased triglyceride catabolism.
    supported_by:
    - reference_id: PMID:27672113
      supporting_text: nprl2 and nprl3 mutant adults contain reduced amounts of 
        stored TAG relative to wild-type animals
- term:
    id: GO:1904262
    label: negative regulation of TORC1 signaling
  evidence_type: IGI
  original_reference_id: PMID:27672113
  review:
    summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid 
      starvation.
    action: ACCEPT
    reason: Both UniProt and starvation studies describe Nprl3-mediated 
      inhibition of TORC1 in response to amino-acid limitation.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: functions as an inhibitor of the amino acid-sensing 
        branch of the TORC1 signaling pathway
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 inhibit TORC1 signaling in the female 
        germline in response to amino-acid starvation.
    - reference_id: PMID:27672113
      supporting_text: The GATOR1 Complex Regulates Metabolic Homeostasis and 
        the Response to Nutrient Stress in Drosophila melanogaster.
- term:
    id: GO:0005764
    label: lysosome
  evidence_type: IDA
  original_reference_id: PMID:25512509
  review:
    summary: Nprl3 localizes to lysosomes under nutrient stress.
    action: KEEP_AS_NON_CORE
    reason: Lysosomal targeting is reported for Nprl2/Nprl3.
    supported_by:
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 physically interact and are targeted to 
        lysosomes and autolysosomes
    - reference_id: PMID:25512509
      supporting_text: TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic 
        entry and oocyte development in Drosophila.
- term:
    id: GO:1904262
    label: negative regulation of TORC1 signaling
  evidence_type: IMP
  original_reference_id: PMID:27672113
  review:
    summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid 
      starvation.
    action: ACCEPT
    reason: Both UniProt and starvation studies describe Nprl3-mediated 
      inhibition of TORC1 in response to amino-acid limitation.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: functions as an inhibitor of the amino acid-sensing 
        branch of the TORC1 signaling pathway
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 inhibit TORC1 signaling in the female 
        germline in response to amino-acid starvation.
    - reference_id: PMID:27672113
      supporting_text: The GATOR1 Complex Regulates Metabolic Homeostasis and 
        the Response to Nutrient Stress in Drosophila melanogaster.
- term:
    id: GO:0016239
    label: positive regulation of macroautophagy
  evidence_type: IGI
  original_reference_id: PMID:27166823
  review:
    summary: Nprl3 supports macroautophagy during amino-acid starvation.
    action: KEEP_AS_NON_CORE
    reason: GATOR1 mutants fail to activate autophagy during amino-acid 
      starvation.
    supported_by:
    - reference_id: PMID:27672113
      supporting_text: nprl2 and nprl3 mutants fail to activate autophagy in 
        response to amino acid limitation
    - reference_id: PMID:27166823
      supporting_text: The GATOR2 Component Wdr24 Regulates TORC1 Activity and 
        Lysosome Function.
- term:
    id: GO:0035859
    label: Seh1-associated complex
  evidence_type: IDA
  original_reference_id: PMID:27166823
  review:
    summary: The SEA/GATOR complex term is broader than the specific GATOR1 
      complex membership.
    action: MODIFY
    reason: Evidence supports GATOR1 subcomplex membership; use the specific 
      GATOR1 complex term.
    proposed_replacement_terms:
    - id: GO:1990130
      label: GATOR1 complex
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: Component of the GATOR complex consisting of mio, 
        Nup44A/Seh1, Im11, Nplr3, Nplr2, Wdr24, Wdr59 and Sec13
    - reference_id: PMID:27166823
      supporting_text: The GATOR2 Component Wdr24 Regulates TORC1 Activity and 
        Lysosome Function.
- term:
    id: GO:1904262
    label: negative regulation of TORC1 signaling
  evidence_type: IGI
  original_reference_id: PMID:27166823
  review:
    summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid 
      starvation.
    action: ACCEPT
    reason: Both UniProt and starvation studies describe Nprl3-mediated 
      inhibition of TORC1 in response to amino-acid limitation.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: functions as an inhibitor of the amino acid-sensing 
        branch of the TORC1 signaling pathway
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 inhibit TORC1 signaling in the female 
        germline in response to amino-acid starvation.
    - reference_id: PMID:27166823
      supporting_text: The GATOR2 Component Wdr24 Regulates TORC1 Activity and 
        Lysosome Function.
- term:
    id: GO:1990130
    label: GATOR1 complex
  evidence_type: TAS
  original_reference_id: PMID:27166823
  review:
    summary: Nprl3 is a core subunit of the GATOR1 complex.
    action: ACCEPT
    reason: UniProt annotates Nprl3 as a probable GATOR1 subcomplex component, 
      supporting this complex membership.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: probable component of the GATOR1 subcomplex which is 
        likely composed of Iml1, Nplr2 and Nplr3
    - reference_id: PMID:27166823
      supporting_text: The GATOR2 Component Wdr24 Regulates TORC1 Activity and 
        Lysosome Function.
- term:
    id: GO:0061700
    label: GATOR2 complex
  evidence_type: IDA
  original_reference_id: PMID:27166823
  review:
    summary: Nprl3 is a GATOR1 subunit, not a GATOR2 complex component.
    action: MODIFY
    reason: UniProt places Nprl3 in the GATOR1 subcomplex; annotate to GATOR1 
      rather than GATOR2.
    proposed_replacement_terms:
    - id: GO:1990130
      label: GATOR1 complex
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: probable component of the GATOR1 subcomplex which is 
        likely composed of Iml1, Nplr2 and Nplr3
    - reference_id: PMID:27166823
      supporting_text: The GATOR2 Component Wdr24 Regulates TORC1 Activity and 
        Lysosome Function.
- term:
    id: GO:1904262
    label: negative regulation of TORC1 signaling
  evidence_type: IMP
  original_reference_id: PMID:27166823
  review:
    summary: Nprl3 inhibits TORC1 signaling, especially under amino-acid 
      starvation.
    action: ACCEPT
    reason: Both UniProt and starvation studies describe Nprl3-mediated 
      inhibition of TORC1 in response to amino-acid limitation.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: functions as an inhibitor of the amino acid-sensing 
        branch of the TORC1 signaling pathway
    - reference_id: PMID:24786828
      supporting_text: Nprl2 and Nprl3 inhibit TORC1 signaling in the female 
        germline in response to amino-acid starvation.
    - reference_id: PMID:27166823
      supporting_text: The GATOR2 Component Wdr24 Regulates TORC1 Activity and 
        Lysosome Function.
- term:
    id: GO:0032007
    label: negative regulation of TOR signaling
  evidence_type: IMP
  original_reference_id: PMID:23723238
  review:
    summary: This term is too general for the specific TORC1 inhibition shown 
      for Nprl3.
    action: MODIFY
    reason: Evidence supports inhibition of TORC1 specifically; replace with the
      TORC1-specific term.
    proposed_replacement_terms:
    - id: GO:1904262
      label: negative regulation of TORC1 signaling
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: functions as an inhibitor of the amino acid-sensing 
        branch of the TORC1 signaling pathway
    - reference_id: PMID:23723238
      supporting_text: A Tumor suppressor complex with GAP activity for the Rag 
        GTPases that signal amino acid sufficiency to mTORC1.
- term:
    id: GO:0034198
    label: cellular response to amino acid starvation
  evidence_type: IMP
  original_reference_id: PMID:23723238
  review:
    summary: Nprl3 participates in the response to amino-acid starvation.
    action: ACCEPT
    reason: The Nprl2/Nprl3 complex mediates an adaptive response to amino-acid 
      starvation.
    supported_by:
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
    - reference_id: PMID:23723238
      supporting_text: A Tumor suppressor complex with GAP activity for the Rag 
        GTPases that signal amino acid sufficiency to mTORC1.
- term:
    id: GO:0007293
    label: germarium-derived egg chamber formation
  evidence_type: IGI
  original_reference_id: PMID:25512509
  review:
    summary: Evidence points to oogenesis/meiotic entry roles rather than the 
      specific egg chamber formation term.
    action: MODIFY
    reason: Use the broader oogenesis term supported by meiotic entry/oocyte 
      development data.
    proposed_replacement_terms:
    - id: GO:0048477
      label: oogenesis
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: control meiotic entry and promote oocyte growth and 
        development
    - reference_id: PMID:25512509
      supporting_text: TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic 
        entry and oocyte development in Drosophila.
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:24786828
  review: *id003
- term:
    id: GO:0005634
    label: nucleus
  evidence_type: IDA
  original_reference_id: PMID:24786828
  review:
    summary: Nuclear localization is not supported by the accessible sources 
      used for this review.
    action: UNDECIDED
    reason: Available curated localization statements emphasize 
      cytoplasm/lysosome/autolysosome without nuclear evidence.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: 'SUBCELLULAR LOCATION: Cytoplasm {ECO:0000269|PubMed:24786828}.
        Lysosome'
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
- term:
    id: GO:0005737
    label: cytoplasm
  evidence_type: IDA
  original_reference_id: PMID:24786828
  review:
    summary: Nprl3 localizes to the cytoplasm.
    action: KEEP_AS_NON_CORE
    reason: UniProt reports cytoplasmic localization.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: 'SUBCELLULAR LOCATION: Cytoplasm'
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
- term:
    id: GO:0034198
    label: cellular response to amino acid starvation
  evidence_type: IMP
  original_reference_id: PMID:24786828
  review: *id001
- term:
    id: GO:0044754
    label: autolysosome
  evidence_type: IDA
  original_reference_id: PMID:24786828
  review:
    summary: Nprl3 localizes to autolysosomes during amino-acid starvation.
    action: KEEP_AS_NON_CORE
    reason: UniProt notes primary localization to autolysosomes under amino-acid
      starvation.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: Localizes primarily to the autolysosomes during 
        amino-acid starvation
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
- term:
    id: GO:0045792
    label: negative regulation of cell size
  evidence_type: IMP
  original_reference_id: PMID:24786828
  review:
    summary: Nprl3 restrains TORC1-dependent cell growth, consistent with 
      negative regulation of cell size.
    action: KEEP_AS_NON_CORE
    reason: GATOR1 inhibition of TORC1-dependent growth supports reduced cell 
      size/growth phenotypes.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: inhibiting TORC1-dependent cell growth
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
- term:
    id: GO:0048477
    label: oogenesis
  evidence_type: IMP
  original_reference_id: PMID:24786828
  review:
    summary: Nprl3 participates in oogenesis through GATOR1 control of meiotic 
      entry and oocyte development.
    action: KEEP_AS_NON_CORE
    reason: UniProt describes GATOR1 roles in meiotic entry and oocyte growth.
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: control meiotic entry and promote oocyte growth and 
        development
    - reference_id: PMID:24786828
      supporting_text: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive 
        response to amino-acid starvation in Drosophila.
- term:
    id: GO:0035859
    label: Seh1-associated complex
  evidence_type: ISS
  original_reference_id: PMID:21454883
  review:
    summary: The SEA/GATOR complex term is broader than the specific GATOR1 
      complex membership.
    action: MODIFY
    reason: Evidence supports GATOR1 subcomplex membership; use the specific 
      GATOR1 complex term.
    proposed_replacement_terms:
    - id: GO:1990130
      label: GATOR1 complex
    supported_by:
    - reference_id: file:genes/DROME/Nprl3/Nprl3-uniprot.txt
      supporting_text: Component of the GATOR complex consisting of mio, 
        Nup44A/Seh1, Im11, Nplr3, Nplr2, Wdr24, Wdr59 and Sec13
    - reference_id: PMID:21454883
      supporting_text: A conserved coatomer-related complex containing Sec13 and
        Seh1 dynamically associates with the vacuole in Saccharomyces 
        cerevisiae.
- term:
    id: GO:0005096
    label: GTPase activator activity
  evidence_type: TAS
  original_reference_id: PMID:23723238
  review:
    summary: GATOR1 provides RagA/B GAP activity that inhibits TORC1 signaling.
    action: NEW
    reason: GATOR1 is the Nprl2/Nprl3/Iml1 complex and is reported to have 
      GTPase-activating protein activity for RagA/B, supporting a GTPase 
      activator activity annotation for its subunits.
    supported_by:
    - reference_id: PMID:23723238
      supporting_text: GATOR1 has GTPase-activating protein (GAP) activity for 
        RagA and RagB, and its components are mutated in human cancer
references:
- id: GO_REF:0000002
  title: Gene Ontology annotation through association of InterPro records with 
    GO terms
  findings: []
- id: GO_REF:0000033
  title: Annotation inferences using phylogenetic trees
  findings: []
- id: GO_REF:0000043
  title: Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping
  findings: []
- id: GO_REF:0000044
  title: Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular 
    Location vocabulary mapping, accompanied by conservative changes to GO terms
    applied by UniProt
  findings: []
- id: PMID:21454883
  title: A conserved coatomer-related complex containing Sec13 and Seh1 
    dynamically associates with the vacuole in Saccharomyces cerevisiae.
  findings: []
- id: PMID:23723238
  title: A Tumor suppressor complex with GAP activity for the Rag GTPases that 
    signal amino acid sufficiency to mTORC1.
  findings: []
- id: PMID:24786828
  title: The TORC1 inhibitors Nprl2 and Nprl3 mediate an adaptive response to 
    amino-acid starvation in Drosophila.
  findings: []
- id: PMID:25512509
  title: TORC1 regulators Iml1/GATOR1 and GATOR2 control meiotic entry and 
    oocyte development in Drosophila.
  findings: []
- id: PMID:27166823
  title: The GATOR2 Component Wdr24 Regulates TORC1 Activity and Lysosome 
    Function.
  findings: []
- id: PMID:27672113
  title: The GATOR1 Complex Regulates Metabolic Homeostasis and the Response to 
    Nutrient Stress in Drosophila melanogaster.
  findings: []
- id: PMID:38944040
  title: Next-generation Drosophila protein interactome map and its functional 
    implications.
  findings: []
core_functions:
- description: Nprl3 is a GATOR1 subunit that contributes to Rag 
    GTPase-activating activity to inhibit TORC1 during amino acid starvation.
  supported_by:
  - reference_id: file:genes/DROME/Nprl3/Nprl3-deep-research-falcon.md
    supporting_text: GATOR1 is a conserved heterotrimer composed of DEPDC5, 
      NPRL2, and NPRL3.
  - reference_id: PMID:24786828
    supporting_text: Nprl2 and Nprl3 inhibit TORC1 signaling in the female 
      germline in response to amino-acid starvation.
  molecular_function:
    id: GO:0005096
    label: GTPase activator activity
  directly_involved_in:
  - id: GO:1904262
    label: negative regulation of TORC1 signaling
  - id: GO:0034198
    label: cellular response to amino acid starvation
  in_complex:
    id: GO:1990130
    label: GATOR1 complex