GATOR1 complex subunit that inhibits TORC1 signaling and supports starvation responses in the germline and soma.
| 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.
Proposed replacements:
negative regulation of TORC1 signaling
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.
Proposed replacements:
germline cell cycle switching, mitotic to meiotic cell cycle
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.
Proposed replacements:
negative regulation of TORC1 signaling
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
|
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model: Edison Scientific Literature
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start_time: '2026-02-01T16:13:12.097262'
end_time: '2026-02-01T16:13:12.099564'
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template_file: templates/gene_research_go_focused.md
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
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.
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
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.
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.
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.
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
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
(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.
(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.
(belanger2021biochemicalregulatorymechanisms pages 30-34): J Bélanger. Biochemical regulatory mechanisms of the gator1 complex. Unknown journal, 2021.
(belanger2021biochemicalregulatorymechanisms pages 34-38): J Bélanger. Biochemical regulatory mechanisms of the gator1 complex. Unknown journal, 2021.
(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.
(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.
(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.
(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.
(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.
(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.
(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.
(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.
(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.
(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.
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