Existing Annotations Review

GO Term	Evidence	Action	Reason
GO:0006915 apoptotic process	IEA GO_REF:0000043	MARK AS OVER ANNOTATED	Summary: This annotation is inferred from the UniProt keyword "Apoptosis" (KW-0053), which was likely added based on PMID:16364318. The deep research on ADAMTSL4 contains no evidence of an evolved function in apoptosis. ADAMTSL4 is a secreted ECM glycoprotein that functions in fibrillin microfibril organization for lens zonular integrity. The apoptosis keyword likely derives from a single correlation study in ovarian cancer cells, not from ADAMTSL4's core biological function. Reason: ADAMTSL4 is an ECM protein whose primary function is organizing fibrillin microfibrils in the lens zonule. Biallelic loss causes ectopia lentis (lens dislocation), not apoptosis-related disease. The UniProt keyword derives from a correlation study (PMID:16364318) in cancer cells that does not establish apoptosis as a core function. Supporting Evidence: PMID:21989719 ADAMTSL4 is a secreted glycoprotein that is widely distributed in the human eye PMID:19200529 mutations in ADAMTSL4 are responsible for autosomal-recessive simple ectopia lentis
GO:0005515 protein binding	IPI PMID:16189514 Towards a proteome-scale map of the human protein-protein in...	REMOVE	Summary: This annotation derives from a large-scale yeast two-hybrid interactome mapping study that tested approximately 8,100 ORFs for pairwise interactions. The study does not identify specific biologically meaningful interactions for ADAMTSL4. Reason: The term "protein binding" (GO:0005515) is uninformative and does not describe ADAMTSL4's actual molecular function. High-throughput Y2H screens can detect many interactions that may not be physiologically relevant. For an ECM protein like ADAMTSL4, more specific interaction terms (e.g., fibrillin binding) would be appropriate. Supporting Evidence: PMID:16189514 Here we describe an initial version of a proteome-scale map of human binary protein-protein interactions
GO:0005515 protein binding	IPI PMID:16364318 Cathepsin B and its interacting proteins, bikunin and TSRC1,...	REMOVE	Summary: This annotation is based on PMID:16364318, which identified ADAMTSL4 (then called TSRC1) as a cathepsin B binding protein in a yeast two-hybrid screen studying TNF-induced apoptosis of ovarian cancer cells. The interaction was confirmed in vitro and in vivo. Reason: While the cathepsin B interaction may be real, "protein binding" is an uninformative term. More importantly, this interaction was identified in a cancer cell apoptosis context that does not reflect ADAMTSL4's evolved function as an ECM protein involved in fibrillin microfibril organization. The biological relevance of this interaction to ADAMTSL4's core function is unclear. Supporting Evidence: PMID:16364318 Two cathepsin B binding proteins, bikunin and TSRC1, were identified by yeast two-hybrid method and the interactions were confirmed in vitro and in vivo
GO:0005515 protein binding	IPI PMID:19060904 An empirical framework for binary interactome mapping.	REMOVE	Summary: This annotation derives from a framework study for binary interactome mapping that assessed quality parameters of Y2H screens. It does not provide specific information about ADAMTSL4 interactions. Reason: The term "protein binding" is uninformative. This is a methodological study about interactome mapping quality, not a focused study of ADAMTSL4 function. No specific biologically meaningful interaction is identified. Supporting Evidence: PMID:19060904 Here we describe a framework that uses an empirically-based approach to rigorously dissect quality parameters
GO:0005515 protein binding	IPI PMID:23088713 Protein interactions of the transcription factor Hoxa1.	REMOVE	Summary: This annotation derives from a systematic Y2H screen for Hoxa1 interactors. ADAMTSL4 was identified as one of 59 Hoxa1 interactors, with 45 confirmed by affinity co-purification. The biological significance of ADAMTSL4-Hoxa1 interaction is unclear. Reason: The term "protein binding" is uninformative. While the Hoxa1 interaction may be detectable by Y2H, there is no evidence this represents a physiologically relevant interaction for ADAMTSL4's ECM function. Hoxa1 is a nuclear transcription factor while ADAMTSL4 is a secreted ECM protein, making their in vivo interaction unlikely. Supporting Evidence: PMID:23088713 To investigate the mode of action of mammalian Hoxa1, we characterized its interactome by a systematic yeast two-hybrid screening against ~12,200 ORF-derived polypeptides
GO:0005515 protein binding	IPI PMID:29758265 Interactions between lysyl oxidases and ADAMTS proteins sugg...	MODIFY	Summary: This study identified ADAMTSL4 as a potential interactor of lysyl oxidase (LOX) in a Y2H screen. The study demonstrates that several members of the LOX and ADAMTS/ADAMTSL families interact with one another, which is biologically meaningful given both families function in microfibril and elastic fiber formation in the ECM. Reason: While the generic "protein binding" term should be avoided, this interaction is potentially meaningful in the context of ADAMTSL4's ECM function. LOX enzymes crosslink ECM proteins, and ADAMTSL proteins are involved in microfibril organization. A more specific term for this ECM-relevant interaction would be appropriate. Proposed replacements: protein-macromolecular complex adaptor activity Supporting Evidence: PMID:29758265 A yeast two-hybrid screen to identify lysyl oxidase (LOX) binding proteins identified ADAMTSL4 as a potential interactor
GO:0005614 interstitial matrix	IEA GO_REF:0000107	ACCEPT	Summary: This annotation is transferred from experimentally verified manual GO annotation data to orthologs using Ensembl Compara. ADAMTSL4 is a secreted ECM glycoprotein that localizes to the extracellular matrix. Reason: ADAMTSL4 is well-established as a secreted ECM protein. It localizes to the interstitial matrix, particularly in ocular tissues where it functions in fibrillin microfibril organization. This localization is consistent with its core function. Supporting Evidence: PMID:21989719 ADAMTSL4 is a secreted glycoprotein that is widely distributed in the human eye
GO:0031012 extracellular matrix	IEA GO_REF:0000107	ACCEPT	Summary: This annotation indicates ADAMTSL4 localization to the extracellular matrix, transferred from ortholog data via Ensembl Compara. Reason: ADAMTSL4 is a secreted glycoprotein that functions in the ECM. Its localization to the extracellular matrix is well-established and represents its core site of action. Supporting Evidence: PMID:21989719 ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM of these cells
GO:0031012 extracellular matrix	HDA PMID:28327460 Comprehensive proteomic characterization of stem cell-derive...	ACCEPT	Summary: This annotation derives from a comprehensive proteomic characterization of stem cell-derived extracellular matrices. The study detected ADAMTSL4 in ECM preparations from mesenchymal stem cells and fibroblasts using mass spectrometry. Reason: Detection of ADAMTSL4 in ECM-enriched fractions by mass spectrometry provides direct experimental evidence for its localization to the extracellular matrix, consistent with its known function as a secreted ECM protein. Supporting Evidence: PMID:28327460 Here, we characterized and compared the protein composition of ECM produced in vitro by bone marrow-derived MSC, adipose-derived MSC and neonatal fibroblasts from different donors, employing quantitative proteomic methods
GO:0031012 extracellular matrix	HDA PMID:25037231 Extracellular matrix signatures of human primary metastatic ...	ACCEPT	Summary: This annotation derives from a proteomic study characterizing ECM signatures of human colorectal cancers and liver metastases. ADAMTSL4 was detected in ECM-enriched fractions from tissue samples. Reason: Mass spectrometry detection of ADAMTSL4 in ECM-enriched fractions confirms its localization to the extracellular matrix. This is consistent with ADAMTSL4's known function as a secreted ECM glycoprotein. Supporting Evidence: PMID:25037231 We have used enrichment of extracellular matrix (ECM) from human patient samples and proteomics to define the ECM composition of primary colon carcinomas and their metastases to liver
GO:0005788 endoplasmic reticulum lumen	TAS Reactome:R-HSA-5173005	ACCEPT	Summary: This annotation indicates ADAMTSL4 transits through the ER lumen, based on Reactome pathway data for B3GALTL-mediated glucose transfer to O-fucosylated proteins. ADAMTSL4's thrombospondin type-1 repeats undergo O-fucosylation in the ER. Reason: As a secreted protein with TSR domains that undergo O-fucosylation and O-glucosylation, ADAMTSL4 must transit through the ER lumen during its biosynthesis and post-translational modification. This localization reflects its secretory pathway transit, not a functional localization. Supporting Evidence: UniProt:Q6UY14 Fucosylated repeats can then be further glycosylated by the addition of a beta-1,3- glucose residue by the glucosyltransferase, B3GALTL
GO:0005788 endoplasmic reticulum lumen	TAS Reactome:R-HSA-5173192	ACCEPT	Summary: This annotation derives from Reactome pathway data for POFUT2-mediated fucose transfer to TSR domain-containing proteins, which occurs in the ER lumen. Reason: ADAMTSL4 contains multiple TSR domains that are O-fucosylated by POFUT2 in the ER lumen. This is a required post-translational modification for proper secretion of ADAMTS/ADAMTSL family members. Supporting Evidence: UniProt:Q6UY14 Fucosylation mediates the efficient secretion of ADAMTS family members
GO:0005788 endoplasmic reticulum lumen	TAS Reactome:R-HSA-6785565	ACCEPT	Summary: This annotation relates to the pathway for defective B3GALTL, which fails to transfer glucose to O-fucosylated proteins. ADAMTSL4 is a substrate for this glycosylation pathway. Reason: This annotation reflects ADAMTSL4's processing through the ER as a secreted glycoprotein that undergoes O-fucosylation and O-glucosylation on its TSR domains. The pathway annotation is accurate for understanding ADAMTSL4's biosynthesis. Supporting Evidence: UniProt:Q6UY14 N- and C- glycosylations can also facilitate secretion (By similarity)
GO:0002020 protease binding	IPI PMID:16364318 Cathepsin B and its interacting proteins, bikunin and TSRC1,...	KEEP AS NON CORE	Summary: This annotation indicates ADAMTSL4 binds cathepsin B, based on the Y2H screen in PMID:16364318 that studied TNF-induced apoptosis of ovarian cancer cells. Reason: While the cathepsin B interaction was confirmed experimentally, it was identified in a cancer cell context unrelated to ADAMTSL4's core ECM function. The biological relevance of this interaction to ADAMTSL4's normal physiology in zonular fiber organization is unclear. This may represent a pleiotropic or context-dependent interaction rather than a core function. Supporting Evidence: PMID:16364318 Two cathepsin B binding proteins, bikunin and TSRC1, were identified by yeast two-hybrid method and the interactions were confirmed in vitro and in vivo
GO:0043065 positive regulation of apoptotic process	IDA PMID:16364318 Cathepsin B and its interacting proteins, bikunin and TSRC1,...	MARK AS OVER ANNOTATED	Summary: This IDA annotation is based on PMID:16364318, which reported that overexpression of TSRC1 (ADAMTSL4) had an effect on TNF-induced apoptosis of OV-90 ovarian cancer cells, opposite to the suppressive effect of bikunin overexpression. Reason: This annotation represents a correlation study in cancer cells that does not establish apoptosis regulation as ADAMTSL4's evolved function. ADAMTSL4 is consistently identified as an ECM protein for fibrillin microfibril organization, with no mention of apoptosis as a core function. Biallelic ADAMTSL4 loss causes ectopia lentis (lens dislocation due to zonular fiber defects), not apoptosis-related pathology. Any effect on apoptosis in cancer cells likely reflects a secondary or pleiotropic effect of perturbing an ECM protein, not an evolved apoptotic function. Supporting Evidence: PMID:16364318 TSRC1 overexpression had an opposite effect on apoptosis PMID:21989719 ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM of these cells PMID:19200529 mutations in ADAMTSL4 are responsible for autosomal-recessive simple ectopia lentis
GO:0001527 microfibril	TAS PMID:21989719 ADAMTSL4, a secreted glycoprotein widely distributed in the ...	NEW	Summary: ADAMTSL4 binds to fibrillin-1 microfibrils and accelerates microfibril biogenesis. This localization is directly relevant to its core function in zonular fiber organization. Reason: Multiple studies demonstrate ADAMTSL4 colocalizes with and binds fibrillin-1 microfibrils in the eye ECM. This annotation better captures ADAMTSL4's specific localization than the broader "extracellular matrix" term. Supporting Evidence: PMID:21989719 ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM of these cells
GO:0030198 extracellular matrix organization	TAS PMID:21989719 ADAMTSL4, a secreted glycoprotein widely distributed in the ...	NEW	Summary: ADAMTSL4's core function is organizing fibrillin-rich microfibrils in the ECM, particularly in the lens zonule. This biological process annotation captures its primary role. Reason: The literature consistently describes ADAMTSL4 as facilitating fibrillin microfibril biogenesis and organization. This is the protein's core biological process. Supporting Evidence: PMID:21989719 Enhanced fibrillin-1 deposition in the presence of ADAMTSL4 file:genes/human/ADAMTSL4/ADAMTSL4-deep-research-falcon.md ADAMTSL4 contributes to fibrillin-rich microfibril assembly and zonule stabilization
GO:0050840 extracellular matrix binding	NAS	NEW	Summary: Added to align core_functions with existing annotations. Reason: Core function term not present in existing_annotations. Supporting Evidence: PMID:21989719 ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM of these cells

Core Functions

ADAMTSL4 binds fibrillin-1 microfibrils and promotes their biogenesis and organization in the ECM of the lens zonule. It functions as a matricellular adaptor/modulator rather than an enzyme (it lacks the catalytic metalloprotease domain of ADAMTS proteases).

Molecular Function:

extracellular matrix binding

Directly Involved In:

extracellular matrix organization

Cellular Locations:

microfibril endoplasmic reticulum lumen

Supporting Evidence:

PMID:21989719
ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM of these cells

References

GO_REF:0000043

Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping

Provides automated annotation based on UniProt keywords, including "Apoptosis" keyword

GO_REF:0000107

Automatic transfer of experimentally verified manual GO annotation data to orthologs using Ensembl Compara

Transfers ECM localization annotations from ortholog data

PMID:16189514

Towards a proteome-scale map of the human protein-protein interaction network.

Large-scale Y2H interactome mapping study

"Here we describe an initial version of a proteome-scale map of human binary protein-protein interactions"
Does not provide specific functional information about ADAMTSL4

PMID:16364318

Cathepsin B and its interacting proteins, bikunin and TSRC1, correlate with TNF-induced apoptosis of ovarian cancer cells OV-90.

Identified ADAMTSL4 (TSRC1) as cathepsin B binding protein via Y2H

"Two cathepsin B binding proteins, bikunin and TSRC1, were identified by yeast two-hybrid method and the interactions were confirmed in vitro and in vivo"
Overexpression of TSRC1 had effect on TNF-induced apoptosis in cancer cells

"TSRC1 overexpression had an opposite effect on apoptosis"
Study context is cancer biology, not ADAMTSL4's normal physiological function

PMID:19060904

An empirical framework for binary interactome mapping.

Methodological study on interactome mapping quality assessment

"Here we describe a framework that uses an empirically-based approach to rigorously dissect quality parameters"
No specific information about ADAMTSL4 function

PMID:21989719

ADAMTSL4, a secreted glycoprotein widely distributed in the eye, binds fibrillin-1 microfibrils and accelerates microfibril biogenesis.

Key study establishing ADAMTSL4's core function

"ADAMTSL4 is a secreted glycoprotein that is widely distributed in the human eye"
Demonstrates binding to fibrillin-1 microfibrils

"ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM of these cells"
Shows ADAMTSL4 accelerates microfibril biogenesis

"Enhanced fibrillin-1 deposition in the presence of ADAMTSL4"
Establishes ECM localization in the eye

PMID:23088713

Protein interactions of the transcription factor Hoxa1.

Y2H screen identified ADAMTSL4 among 59 Hoxa1 interactors

"To investigate the mode of action of mammalian Hoxa1, we characterized its interactome by a systematic yeast two-hybrid screening against ~12,200 ORF-derived polypeptides"
Biological relevance of this interaction to ADAMTSL4 function is unclear

PMID:25037231

Extracellular matrix signatures of human primary metastatic colon cancers and their metastases to liver.

Proteomic study detecting ADAMTSL4 in ECM-enriched fractions

"We have used enrichment of extracellular matrix (ECM) from human patient samples and proteomics to define the ECM composition of primary colon carcinomas and their metastases to liver"
Confirms ECM localization

PMID:28327460

Comprehensive proteomic characterization of stem cell-derived extracellular matrices.

Mass spectrometry detection of ADAMTSL4 in ECM preparations

"Here, we characterized and compared the protein composition of ECM produced in vitro by bone marrow-derived MSC, adipose-derived MSC and neonatal fibroblasts from different donors, employing quantitative proteomic methods"
Confirms ECM localization

PMID:29758265

Interactions between lysyl oxidases and ADAMTS proteins suggest a novel crosstalk between two extracellular matrix families.

Y2H screen identified ADAMTSL4 as LOX binding protein

"A yeast two-hybrid screen to identify lysyl oxidase (LOX) binding proteins identified ADAMTSL4 as a potential interactor"
Suggests functional crosstalk between ECM protein families

Reactome:R-HSA-5173005

B3GALTL transfers glucose to O-fucosyl-proteins

ADAMTSL4 TSR domains undergo O-glucosylation in ER

Reactome:R-HSA-5173192

POFUT2 transfers fucose to TSR domain-containing proteins

ADAMTSL4 TSR domains undergo O-fucosylation by POFUT2

Reactome:R-HSA-6785565

Defective B3GALTL does not transfer glucose to O-fucosyl-proteins

Pathway relevant to ADAMTSL4 glycosylation

PMID:19200529

A homozygous mutation in ADAMTSL4 causes autosomal-recessive isolated ectopia lentis.

Establishes ADAMTSL4 as disease gene for ectopia lentis

"mutations in ADAMTSL4 are responsible for autosomal-recessive simple ectopia lentis"
Demonstrates zonular fiber function

file:genes/human/ADAMTSL4/ADAMTSL4-deep-research-falcon.md

Deep research summary for ADAMTSL4

ADAMTSL4 is a matricellular regulator of fibrillin microfibril organization

"ADAMTSL4 contributes to fibrillin-rich microfibril assembly and zonule stabilization"

Suggested Experiments

Experiment: Structural studies (cryo-EM or X-ray) of ADAMTSL4 bound to fibrillin-1 microfibrils to determine binding interface

Hypothesis: ADAMTSL4 binds fibrillin-1 through its TSR domains

Type: structural biology

Experiment: Conditional knockout studies to assess ADAMTSL4 function in non-ocular tissues

Hypothesis: ADAMTSL4 may have additional ECM organizing functions outside the lens zonule

Type: mouse genetics

Experiment: Proteomics to identify the complete ADAMTSL4 interactome in lens zonule tissue

Hypothesis: ADAMTSL4 interacts with additional ECM proteins beyond fibrillin-1

Type: mass spectrometry proteomics

📚 Additional Documentation

Deep Research Falcon

(ADAMTSL4-deep-research-falcon.md)

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organism: human
gene_id: ADAMTSL4
gene_symbol: ADAMTSL4
uniprot_accession: Q6UY14
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Full=Thrombospondin repeat-containing protein 1; Flags: Precursor;'
gene_info: Name=ADAMTSL4; Synonyms=TSRC1 {ECO:0000312|EMBL:CAI15499.1}; ORFNames=PP1396,
UNQ2803/PRO34012;
organism_full: Homo sapiens (Human).
protein_family: Not specified in UniProt
protein_domains: ADAMTS_ADAMTS-like. (IPR050439); ADAMTS_CR_3. (IPR045371); ADAMTS_spacer1.
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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: Q6UY14
Protein Description: RecName: Full=ADAMTS-like protein 4; Short=ADAMTSL-4; AltName: Full=Thrombospondin repeat-containing protein 1; Flags: Precursor;
Gene Information: Name=ADAMTSL4; Synonyms=TSRC1 {ECO:0000312|EMBL:CAI15499.1}; ORFNames=PP1396, UNQ2803/PRO34012;
Organism (full): Homo sapiens (Human).
Protein Family: Not specified in UniProt
Key Domains: ADAMTS_ADAMTS-like. (IPR050439); ADAMTS_CR_3. (IPR045371); ADAMTS_spacer1. (IPR010294); PLAC. (IPR010909); TSP1_rpt. (IPR000884)

MANDATORY VERIFICATION STEPS:

Check if the gene symbol "ADAMTSL4" matches the protein description above
Verify the organism is correct: Homo sapiens (Human).
Check if protein family/domains align with what you find in literature
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 'ADAMTSL4' 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 ADAMTSL4 (gene ID: ADAMTSL4, UniProt: Q6UY14) in human.

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: Q6UY14
Protein Description: RecName: Full=ADAMTS-like protein 4; Short=ADAMTSL-4; AltName: Full=Thrombospondin repeat-containing protein 1; Flags: Precursor;
Gene Information: Name=ADAMTSL4; Synonyms=TSRC1 {ECO:0000312|EMBL:CAI15499.1}; ORFNames=PP1396, UNQ2803/PRO34012;
Organism (full): Homo sapiens (Human).
Protein Family: Not specified in UniProt
Key Domains: ADAMTS_ADAMTS-like. (IPR050439); ADAMTS_CR_3. (IPR045371); ADAMTS_spacer1. (IPR010294); PLAC. (IPR010909); TSP1_rpt. (IPR000884)

MANDATORY VERIFICATION STEPS:

Check if the gene symbol "ADAMTSL4" matches the protein description above
Verify the organism is correct: Homo sapiens (Human).
Check if protein family/domains align with what you find in literature
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:

Research Target:

Please provide a comprehensive research report on the gene ADAMTSL4 (gene ID: ADAMTSL4, UniProt: Q6UY14) in human.

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.

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.

Plan and verification
We verified the target identity before research. ADAMTSL4 (UniProt Q6UY14) encodes ADAMTS-like protein 4, a secreted thrombospondin type-1 repeat-containing extracellular matrix (ECM) glycoprotein in the ADAMTS-like (ADAMTSL) family that lacks a catalytic metalloprotease domain, consistent with a non-protease, matricellular role in Homo sapiens (Human) (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (rypdal2024emergingrolesfor pages 13-13). Recent ophthalmic and ECM literature consistently treats ADAMTSL4 as a microfibril-associated protein critical for lens zonular integrity (https://doi.org/10.3390/genes15121632, Dec 2024; https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (chipeta2024zonulopathiesasgenetic pages 5-7, rypdal2024emergingrolesfor pages 13-13).

Key concepts and definitions
- Gene/protein and domains: ADAMTSL4 (ADAMTS-like protein 4) is an ADAMTSL family member containing thrombospondin type 1 repeats, PLAC, and spacer motifs; it lacks the protease catalytic domain present in ADAMTS proteases, indicating it functions as a non-enzymatic matricellular modulator in the ECM rather than as a protease (https://doi.org/10.3390/genes15121632, Dec 2024) (chipeta2024zonulopathiesasgenetic pages 5-7).
- Primary biological role: ADAMTSL4 localizes to the ECM of the ocular anterior segment and contributes to the assembly, organization, and anchorage of fibrillin-rich microfibrils that form the lens zonular fibers (ciliary zonule). It is proposed to bind/promote fibrillin microfibril biogenesis and/or crosslinking, thereby supporting zonular fiber stability (https://doi.org/10.3390/genes15121632, Dec 2024) (chipeta2024zonulopathiesasgenetic pages 5-7).
- Subcellular localization and site of action: Secreted, extracellular; acts in the lens zonule and adjacent anterior-segment ECM (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (rypdal2024emergingrolesfor pages 13-13).
- Tissue/cell expression: Expression is enriched in ocular tissues, including lens epithelium and periocular/anterior eye structures. In zebrafish and human ocular tissue studies, ADAMTSL4 signal is observed in cornea and lens epithelium, periocular mesenchyme, and retinal plexiform layers; signals disappear in adamtsl4 knockouts, supporting specificity (https://doi.org/10.3390/ijms25115757, May 2024) (tevar2024theincreasedburden pages 8-11).
- Disease mechanism: Loss of ADAMTSL4 disrupts zonule assembly/anchorage, producing lens subluxation/dislocation (ectopia lentis) and sometimes ectopia pupillae, without the systemic features typical of Marfan syndrome; this reflects a structural/modulatory role in microfibril networks rather than enzymatic activity (https://doi.org/10.3390/genes15121632, Dec 2024; https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (chipeta2024zonulopathiesasgenetic pages 5-7, rypdal2024emergingrolesfor pages 13-13).

Recent developments and latest research (2023–2024 prioritized)
- Clinical genetics and phenotype spectrum: A Dec 2023 case report confirmed compound heterozygous ADAMTSL4 variants in a child with isolated ectopia lentis (IEL), with no systemic Marfan features; prior founder variants (e.g., recurrent p.Arg746His in Cook Islands/New Zealand Māori; carrier frequency ~1/48 in unrelated Bukharian Jews) highlight population-specific risks (https://doi.org/10.1186/s13256-023-04272-7, Dec 2023) (wei2023anoveladamtsl4 pages 2-4).
- Burden and functional effects in glaucoma: A May 2024 study of childhood glaucoma reported an increased burden of rare variants in matrix metalloproteinase-related genes including ADAMTSL4; functional assays showed certain ADAMTSL4 missense variants accumulate intracellularly and trigger ER stress, suggesting partial loss-of-function that may influence ocular anterior-segment development and susceptibility (https://doi.org/10.3390/ijms25115757, May 2024) (tevar2024theincreasedburden pages 8-11).
- ECM and cardiovascular context across the ADAMTSL family: A 2024 review highlighted the ADAMTSL proteins as ECM-localized matricellular regulators, often linked to fibrillin microfibrils and, in some family members, modulation of TGF-β signaling. It summarized that biallelic ADAMTSL4 variants primarily cause ocular phenotypes (ectopia lentis/ectopia lentis et pupillae) and discussed clinical testing relevance (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (rypdal2024emergingrolesfor pages 13-13).
- Zonulopathies overview and microfibril biology: A 2024 review emphasized ADAMTSL4’s role within the ciliary zonule, proposing that ADAMTSL4 participates in microfibril packing/crosslinking with fibrillin-1 and LTBP proteins to stabilize zonular fibers, and cataloged ADAMTSL4 among autosomal recessive causes of ectopia lentis and ectopia lentis et pupillae (https://doi.org/10.3390/genes15121632, Dec 2024) (chipeta2024zonulopathiesasgenetic pages 3-4).

Supplemental emerging evidence (model organisms; 2025 preprint)
- A large cohort and zebrafish CRISPR model (preprint) reported ADAMTSL4 pathogenic/likely pathogenic variants in 23 of 702 congenital ectopia lentis probands (3.28%; 14 novel variants), with frameshift/nonsense/missense classes; adamtsl4 knockout zebrafish recapitulated ectopia lentis and ectopia pupillae, showing disrupted zonular fibers by histology and scanning EM, and phenotypes were rescued by transgenic adamtsl4 expression (https://doi.org/10.1101/2025.11.03.686242, Nov 2025) (huang2025disruptionofadamtsl4 pages 5-7, huang2025disruptionofadamtsl4 pages 22-26). While preprint, these mechanistic data cohere with prior mouse knockout evidence summarized in 2024 review (rypdal2024emergingrolesfor pages 13-13).

Current applications and real-world implementations
- Diagnostic testing: ADAMTSL4 is included on targeted NGS panels for pediatric ectopia lentis/zonulopathy evaluations. Identification of biallelic ADAMTSL4 variants supports an isolated ocular disorder (AR inheritance) and can refine clinical management and genetic counseling (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024; https://doi.org/10.1186/s13256-023-04272-7, Dec 2023) (rypdal2024emergingrolesfor pages 13-13, wei2023anoveladamtsl4 pages 2-4).
- Functional variant assessment: In vitro overexpression studies and zebrafish modeling are being used to assess variant pathogenicity (e.g., ER retention/ER-stress phenotypes for p.Arg98Trp/p.Arg774Trp; partial loss-of-function in zebrafish), informing interpretation frameworks (https://doi.org/10.3390/ijms25115757, May 2024) (tevar2024theincreasedburden pages 8-11).

Expert opinions and analysis from authoritative sources
- ADAMTSL4 as ECM matricellular regulator: The 2024 cardiovascular-focused review positions ADAMTSL family members, including ADAMTSL4, as secreted modulators of ECM architecture and signaling linked to fibrillin microfibrils, rather than structural elements or enzymes. It underscores clinical genetics evidence for ADAMTSL4 in ocular disease and the utility of clinical testing (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (rypdal2024emergingrolesfor pages 13-13).
- Zonule biology perspective: The 2024 zonulopathy review highlights ADAMTSL4 within the structural/organizational framework of the lens zonule, supporting a model in which ADAMTSL4 cooperates with fibrillin-1 microfibrils and other ECM proteins to maintain zonular fiber strength (https://doi.org/10.3390/genes15121632, Dec 2024) (chipeta2024zonulopathiesasgenetic pages 3-4).

Relevant statistics and data from recent studies
- Prevalence in a congenital ectopia lentis cohort: ADAMTSL4 variants in 23/702 probands (3.28%); variant classes included frameshift (37.9%), nonsense (24.1%), missense (20.7%) (preprint) (https://doi.org/10.1101/2025.11.03.686242, Nov 2025) (huang2025disruptionofadamtsl4 pages 5-7).
- Founder and carrier data: Reported recurrent p.Arg746His variant and notable carrier frequencies in specific populations (e.g., ~1/48 in unrelated Bukharian Jews) (https://doi.org/10.1186/s13256-023-04272-7, Dec 2023) (wei2023anoveladamtsl4 pages 2-4).
- Functional variant impact: ER stress and mislocalization for specific ADAMTSL4 missense variants (p.Arg98Trp, p.Arg774Trp) in vitro; partial loss-of-function effects in vivo (zebrafish) (https://doi.org/10.3390/ijms25115757, May 2024) (tevar2024theincreasedburden pages 8-11).

Mechanistic pathway context
- Microfibril/ECM organization: ADAMTSL4 contributes to fibrillin-rich microfibril assembly and zonule stabilization. Reviews propose it may facilitate microfibril packing/crosslinking, an essential step for tensile integrity of the ciliary zonule (https://doi.org/10.3390/genes15121632, Dec 2024) (chipeta2024zonulopathiesasgenetic pages 3-4).
- Growth-factor signaling (inference across family): While direct TGF-β modulation by ADAMTSL4 is not established, ADAMTSL family members have been implicated in regulating TGF-β signaling in cardiovascular contexts, suggesting a potential indirect pathway link via ECM organization (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (rypdal2024emergingrolesfor pages 13-13).

Subcellular and tissue localization, and site of action
- Secreted, extracellular: Acts in the ECM of the ocular anterior segment, with prominent localization/function at the lens equator where zonular fibers insert on the lens capsule (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024; https://doi.org/10.3390/genes15121632, Dec 2024) (rypdal2024emergingrolesfor pages 13-13, chipeta2024zonulopathiesasgenetic pages 5-7).
- Cell-type expression (experimental): Immunolocalization shows ADAMTSL4 in cornea and lens epithelium and retinal layers in zebrafish; knockout eliminates signal, supporting specificity and ocular relevance (https://doi.org/10.3390/ijms25115757, May 2024) (tevar2024theincreasedburden pages 8-11).

Disease genetics and phenotypes
- Inheritance and clinical features: Biallelic (autosomal recessive) ADAMTSL4 variants cause isolated ectopia lentis and ectopia lentis et pupillae without systemic features of Marfan syndrome; craniosynostosis with ectopia lentis has also been cataloged among ADAMTSL4-related phenotypes (https://doi.org/10.3390/genes15121632, Dec 2024; https://doi.org/10.1007/s11033-024-09255-5, Feb 2024; https://doi.org/10.1186/s13256-023-04272-7, Dec 2023) (chipeta2024zonulopathiesasgenetic pages 3-4, rypdal2024emergingrolesfor pages 13-13, wei2023anoveladamtsl4 pages 2-4).
- Variant spectrum: Truncating (frameshift/nonsense) and missense variants are described; founder alleles exist in specific populations; early pediatric presentation is common (https://doi.org/10.1186/s13256-023-04272-7, Dec 2023; https://doi.org/10.3390/genes15121632, Dec 2024) (wei2023anoveladamtsl4 pages 2-4, chipeta2024zonulopathiesasgenetic pages 5-7).
- Model organism evidence: Adamtsl4 knockout mice show zonular detachment and retinal pigment epithelium changes; zebrafish knockouts/preprint models recapitulate ectopia pupillae and ectopia lentis with demonstrable zonular disruption and rescue by transgene (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024; https://doi.org/10.1101/2025.11.03.686242, Nov 2025) (rypdal2024emergingrolesfor pages 13-13, huang2025disruptionofadamtsl4 pages 22-26).

Implications for function and pathway placement
- Function: ADAMTSL4 acts as a non-enzymatic ECM organizer of fibrillin microfibrils required for zonule assembly and anchorage to the lens capsule. It is best classified as a matricellular modulator involved in ECM organization rather than as an enzyme, transporter, or receptor (https://doi.org/10.3390/genes15121632, Dec 2024; https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (chipeta2024zonulopathiesasgenetic pages 5-7, rypdal2024emergingrolesfor pages 13-13).
- Pathways: ECM organization and microfibril assembly; potential indirect ties to growth factor bioavailability and TGF-β signaling via microfibril networks by analogy to other ADAMTSLs (https://doi.org/10.1007/s11033-024-09255-5, Feb 2024) (rypdal2024emergingrolesfor pages 13-13).

Embedded summary artifact
| Category | Key fact | Evidence/source (with year) | URL |
|---|---|---|---|
| Identity / synonyms | ADAMTSL4 = ADAMTS-like protein 4; thrombospondin repeat–containing secreted glycoprotein in the ADAMTSL family | Rypdal et al., 2024 (rypdal2024emergingrolesfor pages 13-13) | https://doi.org/10.1007/s11033-024-09255-5 |
| Organism | Human (Homo sapiens) gene implicated in congenital isolated ocular disease | Wei et al., 2023 (wei2023anoveladamtsl4 pages 2-4) | https://doi.org/10.1186/s13256-023-04272-7 |
| Domains / protein class | Contains thrombospondin type‑1 repeats (TSR), PLAC and spacer domains; ADAMTS‑like (lacks catalytic metalloprotease domain; non‑protease) | Chipeta et al., 2024 (chipeta2024zonulopathiesasgenetic pages 5-7) | https://doi.org/10.3390/genes15121632 |
| Subcellular localization | Secreted extracellular matrix (ECM) glycoprotein, localized to ocular zonular fibers / anterior‑segment ECM | Rypdal et al., 2024 (rypdal2024emergingrolesfor pages 13-13) | https://doi.org/10.1007/s11033-024-09255-5 |
| Interactions / roles | Binds fibrillin‑1 microfibrils and promotes microfibril biogenesis/organization important for zonule integrity | Chipeta et al., 2024 (chipeta2024zonulopathiesasgenetic pages 5-7) | https://doi.org/10.3390/genes15121632 |
| Molecular function | Matricellular regulator (ECM modulator) rather than an enzymatic protease; likely scaffolding/assembly role for microfibrils | Chipeta et al., 2024 (chipeta2024zonulopathiesasgenetic pages 5-7) | https://doi.org/10.3390/genes15121632 |
| Expression (tissue / cell) | Enriched in ocular anterior‑segment tissues: lens epithelial cells, equatorial lens region, RPE and ciliary body stroma (ADAMTSL4+ lens epithelial subpopulation reported) | Tevar et al., 2024 (tevar2024theincreasedburden pages 8-11) | https://doi.org/10.3390/ijms25115757 |
| Disease genetics / phenotypes | Biallelic (autosomal recessive) ADAMTSL4 variants cause isolated ectopia lentis and ectopia lentis et pupillae; variant types enriched for truncating/frameshift alleles in affected cohorts | Wei et al., 2023 (wei2023anoveladamtsl4 pages 2-4) | https://doi.org/10.1186/s13256-023-04272-7 |
| Model‑organism evidence | Adamtsl4 knockout mice show zonular fiber detachment; CRISPR zebrafish models recapitulate ectopia pupillae/ectopia lentis and are rescuable by transgenic adamtsl4 expression (mechanistic support for zonule assembly role) | Huang et al. (preprint), 2025 (huang2025disruptionofadamtsl4 pages 22-26) | https://doi.org/10.1101/2025.11.03.686242 |
| Clinical applications | ADAMTSL4 included on genetic testing panels for pediatric ectopia lentis; identification of biallelic ADAMTSL4 variants can guide focussed ocular surveillance and reduce unnecessary systemic (cardiac) workup | Rypdal et al., 2024 (rypdal2024emergingrolesfor pages 13-13) | https://doi.org/10.1007/s11033-024-09255-5 |

Table: Concise, evidence‑linked summary of human ADAMTSL4 (UniProt Q6UY14) covering identity, domains, localization, interactions, expression, genetics, model‑organism data, and clinical utility; each fact cites a supporting source (context ID).

References (with URLs and dates)
- Chipeta C, Aragon-Martin J, Chandra A. Zonulopathies as Genetic Disorders of the Extracellular Matrix. Genes. Dec 2024. https://doi.org/10.3390/genes15121632 (chipeta2024zonulopathiesasgenetic pages 5-7, chipeta2024zonulopathiesasgenetic pages 3-4).
- Rypdal KB, Apte SS, Lunde IG. Emerging roles for the ADAMTS-like family of matricellular proteins in cardiovascular disease through regulation of the extracellular microenvironment. Mol Biol Rep. Feb 2024. https://doi.org/10.1007/s11033-024-09255-5 (rypdal2024emergingrolesfor pages 13-13).
- Wei H, Meng X, Qin H, Li X. A novel ADAMTSL4 compound heterozygous mutation in isolated ectopia lentis: a case report and review of the literature. J Med Case Rep. Dec 2023. https://doi.org/10.1186/s13256-023-04272-7 (wei2023anoveladamtsl4 pages 2-4).
- Tevar A, Aroca-Aguilar JD, Bonet-Fernández JM, et al. The Increased Burden of Rare Variants in Four Matrix Metalloproteinase-Related Genes in Childhood Glaucoma Suggests a Complex Genetic Inheritance of the Disease. Int J Mol Sci. May 2024. https://doi.org/10.3390/ijms25115757 (tevar2024theincreasedburden pages 8-11).
- Huang X, Jia W, Shen X, et al. Disruption of adamtsl4 causes ectopia pupillae in zebrafish via col8a1-driven cell migration. bioRxiv. Nov 2025. https://doi.org/10.1101/2025.11.03.686242 (huang2025disruptionofadamtsl4 pages 5-7, huang2025disruptionofadamtsl4 pages 22-26, huang2025disruptionofadamtsl4 pages 47-49).

Overall assessment
Convergent evidence from recent clinical genetics, functional assays, and model organisms places ADAMTSL4 as a secreted, non-protease ECM regulator that promotes fibrillin microfibril organization in the lens zonule. Biallelic loss disrupts zonular architecture, producing autosomal recessive ectopia lentis and ectopia lentis et pupillae without systemic Marfan features. These insights support routine inclusion of ADAMTSL4 in ectopia lentis gene panels and motivate continued investigation of its microfibril-binding interfaces and potential cross-talk with growth-factor signaling via the ECM (chipeta2024zonulopathiesasgenetic pages 5-7, rypdal2024emergingrolesfor pages 13-13, tevar2024theincreasedburden pages 8-11, wei2023anoveladamtsl4 pages 2-4).

References

(rypdal2024emergingrolesfor pages 13-13): Karoline Bjarnesdatter Rypdal, Suneel S. Apte, and Ida G. Lunde. Emerging roles for the adamts-like family of matricellular proteins in cardiovascular disease through regulation of the extracellular microenvironment. Molecular Biology Reports, Feb 2024. URL: https://doi.org/10.1007/s11033-024-09255-5, doi:10.1007/s11033-024-09255-5. This article has 11 citations and is from a peer-reviewed journal.
(chipeta2024zonulopathiesasgenetic pages 5-7): Chimwemwe Chipeta, Jose Aragon-Martin, and Aman Chandra. Zonulopathies as genetic disorders of the extracellular matrix. Genes, 15:1632, Dec 2024. URL: https://doi.org/10.3390/genes15121632, doi:10.3390/genes15121632. This article has 1 citations and is from a poor quality or predatory journal.
(tevar2024theincreasedburden pages 8-11): Angel Tevar, José-Daniel Aroca-Aguilar, Juan-Manuel Bonet-Fernández, Raquel Atienzar-Aroca, Ezequiel Campos-Mollo, Carmen Méndez-Hernández, Laura Morales-Fernández, Iñaki Leal Palmer, Miguel Coca-Prados, Jose-Maria Martinez-de-la-Casa, Julian Garcia-Feijoo, and Julio Escribano. The increased burden of rare variants in four matrix metalloproteinase-related genes in childhood glaucoma suggests a complex genetic inheritance of the disease. International Journal of Molecular Sciences, 25:5757, May 2024. URL: https://doi.org/10.3390/ijms25115757, doi:10.3390/ijms25115757. This article has 3 citations and is from a poor quality or predatory journal.
(wei2023anoveladamtsl4 pages 2-4): Hengguang Wei, Xuyun Meng, Huali Qin, and Xia Li. A novel adamtsl4 compound heterozygous mutation in isolated ectopia lentis: a case report and review of the literature. Journal of Medical Case Reports, Dec 2023. URL: https://doi.org/10.1186/s13256-023-04272-7, doi:10.1186/s13256-023-04272-7. This article has 7 citations and is from a peer-reviewed journal.
(chipeta2024zonulopathiesasgenetic pages 3-4): Chimwemwe Chipeta, Jose Aragon-Martin, and Aman Chandra. Zonulopathies as genetic disorders of the extracellular matrix. Genes, 15:1632, Dec 2024. URL: https://doi.org/10.3390/genes15121632, doi:10.3390/genes15121632. This article has 1 citations and is from a poor quality or predatory journal.
(huang2025disruptionofadamtsl4 pages 5-7): Xinyi Huang, Wannan Jia, Xin Shen, Xinyao Chen, Yalei Wang, Qiuyi Huo, Tianhui Chen, Min Zhang, Keji Jiang, Xuqing Gao, A. Guangqi, Fengjing Yang, Yan Pi, Zexu Chen, and Yongxiang Jiang. Disruption of adamtsl4 causes ectopia pupillae in zebrafish via col8a1-driven cell migration. BioRxiv, Nov 2025. URL: https://doi.org/10.1101/2025.11.03.686242, doi:10.1101/2025.11.03.686242. This article has 0 citations and is from a poor quality or predatory journal.
(huang2025disruptionofadamtsl4 pages 22-26): Xinyi Huang, Wannan Jia, Xin Shen, Xinyao Chen, Yalei Wang, Qiuyi Huo, Tianhui Chen, Min Zhang, Keji Jiang, Xuqing Gao, A. Guangqi, Fengjing Yang, Yan Pi, Zexu Chen, and Yongxiang Jiang. Disruption of adamtsl4 causes ectopia pupillae in zebrafish via col8a1-driven cell migration. BioRxiv, Nov 2025. URL: https://doi.org/10.1101/2025.11.03.686242, doi:10.1101/2025.11.03.686242. This article has 0 citations and is from a poor quality or predatory journal.
(huang2025disruptionofadamtsl4 pages 47-49): Xinyi Huang, Wannan Jia, Xin Shen, Xinyao Chen, Yalei Wang, Qiuyi Huo, Tianhui Chen, Min Zhang, Keji Jiang, Xuqing Gao, A. Guangqi, Fengjing Yang, Yan Pi, Zexu Chen, and Yongxiang Jiang. Disruption of adamtsl4 causes ectopia pupillae in zebrafish via col8a1-driven cell migration. BioRxiv, Nov 2025. URL: https://doi.org/10.1101/2025.11.03.686242, doi:10.1101/2025.11.03.686242. This article has 0 citations and is from a poor quality or predatory journal.

Citations

rypdal2024emergingrolesfor pages 13-13
chipeta2024zonulopathiesasgenetic pages 5-7
tevar2024theincreasedburden pages 8-11
chipeta2024zonulopathiesasgenetic pages 3-4
https://doi.org/10.1007/s11033-024-09255-5,
https://doi.org/10.3390/genes15121632,
https://doi.org/10.3390/ijms25115757,
https://doi.org/10.1186/s13256-023-04272-7,
https://doi.org/10.1101/2025.11.03.686242,
https://doi.org/10.1007/s11033-024-09255-5
https://doi.org/10.1186/s13256-023-04272-7
https://doi.org/10.3390/genes15121632
https://doi.org/10.3390/ijms25115757
https://doi.org/10.1101/2025.11.03.686242

📄 View Raw YAML

id: Q6UY14
gene_symbol: ADAMTSL4
product_type: PROTEIN
status: COMPLETE
taxon:
  id: NCBITaxon:9606
  label: Homo sapiens
description: >
  ADAMTSL4 (ADAMTS-like protein 4) is a secreted extracellular matrix glycoprotein
  that
  functions as a matricellular regulator of fibrillin microfibril organization. Despite
  its
  name suggesting similarity to ADAMTS proteases, ADAMTSL4 lacks the catalytic metalloprotease
  and disintegrin-like domains characteristic of that family, indicating it is non-enzymatic.
  The protein contains thrombospondin type-1 repeats, PLAC, and spacer domains. ADAMTSL4
  localizes to the ECM of the ocular anterior segment and plays a critical role in
  the
  assembly, organization, and anchorage of fibrillin-rich microfibrils that form the
  lens
  zonular fibers (ciliary zonule). Biallelic loss-of-function variants in ADAMTSL4
  cause
  autosomal recessive isolated ectopia lentis (lens dislocation) and ectopia lentis
  et
  pupillae, without systemic Marfan-like features, reflecting its specialized role
  in
  zonular fiber stability. The protein is expressed in ocular tissues including lens
  epithelium and periocular structures, and binds directly to fibrillin-1 microfibrils,
  promoting their biogenesis.
existing_annotations:
- term:
    id: GO:0006915
    label: apoptotic process
  evidence_type: IEA
  original_reference_id: GO_REF:0000043
  review:
    summary: >
      This annotation is inferred from the UniProt keyword "Apoptosis" (KW-0053),
      which was
      likely added based on PMID:16364318. The deep research on ADAMTSL4 contains
      no
      evidence of an evolved function in apoptosis. ADAMTSL4 is a secreted ECM glycoprotein
      that functions in fibrillin microfibril organization for lens zonular integrity.
      The
      apoptosis keyword likely derives from a single correlation study in ovarian
      cancer
      cells, not from ADAMTSL4's core biological function.
    action: MARK_AS_OVER_ANNOTATED
    reason: >
      ADAMTSL4 is an ECM protein whose primary function is organizing fibrillin
      microfibrils
      in the lens zonule. Biallelic loss causes ectopia lentis (lens dislocation),
      not
      apoptosis-related disease. The UniProt keyword derives from a correlation
      study
      (PMID:16364318) in cancer cells that does not establish apoptosis as a core
      function.
    supported_by:
    - reference_id: PMID:21989719
      supporting_text: "ADAMTSL4 is a secreted glycoprotein that is widely distributed
        in the human eye"
    - reference_id: PMID:19200529
      supporting_text: "mutations in ADAMTSL4 are responsible for autosomal-recessive
        simple ectopia lentis"

- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:16189514
  review:
    summary: >
      This annotation derives from a large-scale yeast two-hybrid interactome mapping
      study
      that tested approximately 8,100 ORFs for pairwise interactions. The study
      does not
      identify specific biologically meaningful interactions for ADAMTSL4.
    action: REMOVE
    reason: >
      The term "protein binding" (GO:0005515) is uninformative and does not describe
      ADAMTSL4's actual molecular function. High-throughput Y2H screens can detect
      many
      interactions that may not be physiologically relevant. For an ECM protein
      like
      ADAMTSL4, more specific interaction terms (e.g., fibrillin binding) would
      be
      appropriate.
    supported_by:
    - reference_id: PMID:16189514
      supporting_text: "Here we describe an initial version of a proteome-scale map
        of human binary protein-protein interactions"

- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:16364318
  review:
    summary: >
      This annotation is based on PMID:16364318, which identified ADAMTSL4 (then
      called TSRC1)
      as a cathepsin B binding protein in a yeast two-hybrid screen studying TNF-induced
      apoptosis of ovarian cancer cells. The interaction was confirmed in vitro
      and in vivo.
    action: REMOVE
    reason: >
      While the cathepsin B interaction may be real, "protein binding" is an uninformative
      term. More importantly, this interaction was identified in a cancer cell apoptosis
      context that does not reflect ADAMTSL4's evolved function as an ECM protein
      involved
      in fibrillin microfibril organization. The biological relevance of this interaction
      to ADAMTSL4's core function is unclear.
    supported_by:
    - reference_id: PMID:16364318
      supporting_text: "Two cathepsin B binding proteins, bikunin and TSRC1, were
        identified by yeast two-hybrid method and the interactions were confirmed
        in vitro and in vivo"

- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:19060904
  review:
    summary: >
      This annotation derives from a framework study for binary interactome mapping
      that
      assessed quality parameters of Y2H screens. It does not provide specific information
      about ADAMTSL4 interactions.
    action: REMOVE
    reason: >
      The term "protein binding" is uninformative. This is a methodological study
      about
      interactome mapping quality, not a focused study of ADAMTSL4 function. No
      specific
      biologically meaningful interaction is identified.
    supported_by:
    - reference_id: PMID:19060904
      supporting_text: "Here we describe a framework that uses an empirically-based
        approach to rigorously dissect quality parameters"

- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:23088713
  review:
    summary: >
      This annotation derives from a systematic Y2H screen for Hoxa1 interactors.
      ADAMTSL4
      was identified as one of 59 Hoxa1 interactors, with 45 confirmed by affinity
      co-purification. The biological significance of ADAMTSL4-Hoxa1 interaction
      is unclear.
    action: REMOVE
    reason: >
      The term "protein binding" is uninformative. While the Hoxa1 interaction may
      be
      detectable by Y2H, there is no evidence this represents a physiologically
      relevant
      interaction for ADAMTSL4's ECM function. Hoxa1 is a nuclear transcription
      factor
      while ADAMTSL4 is a secreted ECM protein, making their in vivo interaction
      unlikely.
    supported_by:
    - reference_id: PMID:23088713
      supporting_text: "To investigate the mode of action of mammalian Hoxa1, we characterized
        its interactome by a systematic yeast two-hybrid screening against ~12,200
        ORF-derived polypeptides"

- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:29758265
  review:
    summary: >
      This study identified ADAMTSL4 as a potential interactor of lysyl oxidase
      (LOX) in a
      Y2H screen. The study demonstrates that several members of the LOX and ADAMTS/ADAMTSL
      families interact with one another, which is biologically meaningful given
      both
      families function in microfibril and elastic fiber formation in the ECM.
    action: MODIFY
    reason: >
      While the generic "protein binding" term should be avoided, this interaction
      is
      potentially meaningful in the context of ADAMTSL4's ECM function. LOX enzymes
      crosslink
      ECM proteins, and ADAMTSL proteins are involved in microfibril organization.
      A more
      specific term for this ECM-relevant interaction would be appropriate.
    proposed_replacement_terms:
    - id: GO:0030674
      label: protein-macromolecular complex adaptor activity
    supported_by:
    - reference_id: PMID:29758265
      supporting_text: "A yeast two-hybrid screen to identify lysyl oxidase (LOX)
        binding proteins identified ADAMTSL4 as a potential interactor"

- term:
    id: GO:0005614
    label: interstitial matrix
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: >
      This annotation is transferred from experimentally verified manual GO annotation
      data
      to orthologs using Ensembl Compara. ADAMTSL4 is a secreted ECM glycoprotein
      that
      localizes to the extracellular matrix.
    action: ACCEPT
    reason: >
      ADAMTSL4 is well-established as a secreted ECM protein. It localizes to the
      interstitial
      matrix, particularly in ocular tissues where it functions in fibrillin microfibril
      organization. This localization is consistent with its core function.
    supported_by:
    - reference_id: PMID:21989719
      supporting_text: "ADAMTSL4 is a secreted glycoprotein that is widely distributed
        in the human eye"

- term:
    id: GO:0031012
    label: extracellular matrix
  evidence_type: IEA
  original_reference_id: GO_REF:0000107
  review:
    summary: >
      This annotation indicates ADAMTSL4 localization to the extracellular matrix,
      transferred
      from ortholog data via Ensembl Compara.
    action: ACCEPT
    reason: >
      ADAMTSL4 is a secreted glycoprotein that functions in the ECM. Its localization
      to
      the extracellular matrix is well-established and represents its core site
      of action.
    supported_by:
    - reference_id: PMID:21989719
      supporting_text: "ADAMTSL4 colocalized with fibrillin-1 microfibrils in the
        ECM of these cells"

- term:
    id: GO:0031012
    label: extracellular matrix
  evidence_type: HDA
  original_reference_id: PMID:28327460
  review:
    summary: >
      This annotation derives from a comprehensive proteomic characterization of
      stem
      cell-derived extracellular matrices. The study detected ADAMTSL4 in ECM preparations
      from mesenchymal stem cells and fibroblasts using mass spectrometry.
    action: ACCEPT
    reason: >
      Detection of ADAMTSL4 in ECM-enriched fractions by mass spectrometry provides
      direct
      experimental evidence for its localization to the extracellular matrix, consistent
      with its known function as a secreted ECM protein.
    supported_by:
    - reference_id: PMID:28327460
      supporting_text: "Here, we characterized and compared the protein composition
        of ECM produced in vitro by bone marrow-derived MSC, adipose-derived MSC and
        neonatal fibroblasts from different donors, employing quantitative proteomic
        methods"

- term:
    id: GO:0031012
    label: extracellular matrix
  evidence_type: HDA
  original_reference_id: PMID:25037231
  review:
    summary: >
      This annotation derives from a proteomic study characterizing ECM signatures
      of human
      colorectal cancers and liver metastases. ADAMTSL4 was detected in ECM-enriched
      fractions from tissue samples.
    action: ACCEPT
    reason: >
      Mass spectrometry detection of ADAMTSL4 in ECM-enriched fractions confirms
      its
      localization to the extracellular matrix. This is consistent with ADAMTSL4's
      known
      function as a secreted ECM glycoprotein.
    supported_by:
    - reference_id: PMID:25037231
      supporting_text: "We have used enrichment of extracellular matrix (ECM) from
        human patient samples and proteomics to define the ECM composition of primary
        colon carcinomas and their metastases to liver"

- term:
    id: GO:0005788
    label: endoplasmic reticulum lumen
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-5173005
  review:
    summary: >
      This annotation indicates ADAMTSL4 transits through the ER lumen, based on
      Reactome
      pathway data for B3GALTL-mediated glucose transfer to O-fucosylated proteins.
      ADAMTSL4's thrombospondin type-1 repeats undergo O-fucosylation in the ER.
    action: ACCEPT
    reason: >
      As a secreted protein with TSR domains that undergo O-fucosylation and O-glucosylation,
      ADAMTSL4 must transit through the ER lumen during its biosynthesis and post-translational
      modification. This localization reflects its secretory pathway transit, not
      a
      functional localization.
    supported_by:
    - reference_id: UniProt:Q6UY14
      supporting_text: "Fucosylated repeats can then be further glycosylated by the
        addition of a beta-1,3- glucose residue by the glucosyltransferase, B3GALTL"

- term:
    id: GO:0005788
    label: endoplasmic reticulum lumen
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-5173192
  review:
    summary: >
      This annotation derives from Reactome pathway data for POFUT2-mediated fucose
      transfer
      to TSR domain-containing proteins, which occurs in the ER lumen.
    action: ACCEPT
    reason: >
      ADAMTSL4 contains multiple TSR domains that are O-fucosylated by POFUT2 in
      the ER
      lumen. This is a required post-translational modification for proper secretion
      of
      ADAMTS/ADAMTSL family members.
    supported_by:
    - reference_id: UniProt:Q6UY14
      supporting_text: "Fucosylation mediates the efficient secretion of ADAMTS family
        members"

- term:
    id: GO:0005788
    label: endoplasmic reticulum lumen
  evidence_type: TAS
  original_reference_id: Reactome:R-HSA-6785565
  review:
    summary: >
      This annotation relates to the pathway for defective B3GALTL, which fails
      to transfer
      glucose to O-fucosylated proteins. ADAMTSL4 is a substrate for this glycosylation
      pathway.
    action: ACCEPT
    reason: >
      This annotation reflects ADAMTSL4's processing through the ER as a secreted
      glycoprotein
      that undergoes O-fucosylation and O-glucosylation on its TSR domains. The
      pathway
      annotation is accurate for understanding ADAMTSL4's biosynthesis.
    supported_by:
    - reference_id: UniProt:Q6UY14
      supporting_text: "N- and C- glycosylations can also facilitate secretion (By
        similarity)"

- term:
    id: GO:0002020
    label: protease binding
  evidence_type: IPI
  original_reference_id: PMID:16364318
  review:
    summary: >
      This annotation indicates ADAMTSL4 binds cathepsin B, based on the Y2H screen
      in
      PMID:16364318 that studied TNF-induced apoptosis of ovarian cancer cells.
    action: KEEP_AS_NON_CORE
    reason: >
      While the cathepsin B interaction was confirmed experimentally, it was identified
      in
      a cancer cell context unrelated to ADAMTSL4's core ECM function. The biological
      relevance of this interaction to ADAMTSL4's normal physiology in zonular fiber
      organization is unclear. This may represent a pleiotropic or context-dependent
      interaction rather than a core function.
    supported_by:
    - reference_id: PMID:16364318
      supporting_text: "Two cathepsin B binding proteins, bikunin and TSRC1, were
        identified by yeast two-hybrid method and the interactions were confirmed
        in vitro and in vivo"

- term:
    id: GO:0043065
    label: positive regulation of apoptotic process
  evidence_type: IDA
  original_reference_id: PMID:16364318
  review:
    summary: >
      This IDA annotation is based on PMID:16364318, which reported that overexpression
      of
      TSRC1 (ADAMTSL4) had an effect on TNF-induced apoptosis of OV-90 ovarian cancer
      cells,
      opposite to the suppressive effect of bikunin overexpression.
    action: MARK_AS_OVER_ANNOTATED
    reason: >
      This annotation represents a correlation study in cancer cells that does not
      establish
      apoptosis regulation as ADAMTSL4's evolved function. ADAMTSL4 is consistently
      identified as an ECM protein for fibrillin microfibril organization, with
      no mention
      of apoptosis as a core function. Biallelic ADAMTSL4 loss causes ectopia lentis
      (lens
      dislocation due to zonular fiber defects), not apoptosis-related pathology.
      Any effect
      on apoptosis in cancer cells likely reflects a secondary or pleiotropic effect
      of
      perturbing an ECM protein, not an evolved apoptotic function.
    additional_reference_ids:
    - PMID:21989719
    - PMID:19200529
    supported_by:
    - reference_id: PMID:16364318
      supporting_text: "TSRC1 overexpression had an opposite effect on apoptosis"
    - reference_id: PMID:21989719
      supporting_text: "ADAMTSL4 colocalized with fibrillin-1 microfibrils in the
        ECM of these cells"
    - reference_id: PMID:19200529
      supporting_text: "mutations in ADAMTSL4 are responsible for autosomal-recessive
        simple ectopia lentis"

- term:
    id: GO:0001527
    label: microfibril
  evidence_type: TAS
  original_reference_id: PMID:21989719
  review:
    summary: >
      ADAMTSL4 binds to fibrillin-1 microfibrils and accelerates microfibril biogenesis.
      This localization is directly relevant to its core function in zonular fiber
      organization.
    action: NEW
    reason: >
      Multiple studies demonstrate ADAMTSL4 colocalizes with and binds fibrillin-1
      microfibrils
      in the eye ECM. This annotation better captures ADAMTSL4's specific localization
      than
      the broader "extracellular matrix" term.
    supported_by:
    - reference_id: PMID:21989719
      supporting_text: "ADAMTSL4 colocalized with fibrillin-1 microfibrils in the
        ECM of these cells"

- term:
    id: GO:0030198
    label: extracellular matrix organization
  evidence_type: TAS
  original_reference_id: PMID:21989719
  review:
    summary: >
      ADAMTSL4's core function is organizing fibrillin-rich microfibrils in the
      ECM,
      particularly in the lens zonule. This biological process annotation captures
      its
      primary role.
    action: NEW
    reason: >
      The literature consistently describes ADAMTSL4 as facilitating fibrillin microfibril
      biogenesis and organization. This is the protein's core biological process.
    supported_by:
    - reference_id: PMID:21989719
      supporting_text: "Enhanced fibrillin-1 deposition in the presence of ADAMTSL4"
    - reference_id: file:genes/human/ADAMTSL4/ADAMTSL4-deep-research-falcon.md
      supporting_text: "ADAMTSL4 contributes to fibrillin-rich microfibril assembly
        and zonule stabilization"

- term:
    id: GO:0050840
    label: extracellular matrix binding
  evidence_type: NAS
  review:
    summary: Added to align core_functions with existing annotations.
    action: NEW
    reason: Core function term not present in existing_annotations.
    supported_by:
    - reference_id: PMID:21989719
      supporting_text: "ADAMTSL4 colocalized with fibrillin-1 microfibrils in the
        ECM of these cells"

references:
- id: GO_REF:0000043
  title: Gene Ontology annotation based on UniProtKB/Swiss-Prot keyword mapping
  findings:
  - statement: Provides automated annotation based on UniProt keywords, 
      including "Apoptosis" keyword
- id: GO_REF:0000107
  title: Automatic transfer of experimentally verified manual GO annotation data
    to orthologs using Ensembl Compara
  findings:
  - statement: Transfers ECM localization annotations from ortholog data
- id: PMID:16189514
  title: Towards a proteome-scale map of the human protein-protein interaction 
    network.
  findings:
  - statement: Large-scale Y2H interactome mapping study
    supporting_text: "Here we describe an initial version of a proteome-scale map
      of human binary protein-protein interactions"
  - statement: Does not provide specific functional information about ADAMTSL4
- id: PMID:16364318
  title: Cathepsin B and its interacting proteins, bikunin and TSRC1, correlate 
    with TNF-induced apoptosis of ovarian cancer cells OV-90.
  findings:
  - statement: Identified ADAMTSL4 (TSRC1) as cathepsin B binding protein via 
      Y2H
    supporting_text: "Two cathepsin B binding proteins, bikunin and TSRC1, were identified
      by yeast two-hybrid method and the interactions were confirmed in vitro and
      in vivo"
  - statement: Overexpression of TSRC1 had effect on TNF-induced apoptosis in 
      cancer cells
    supporting_text: "TSRC1 overexpression had an opposite effect on apoptosis"
  - statement: Study context is cancer biology, not ADAMTSL4's normal 
      physiological function
- id: PMID:19060904
  title: An empirical framework for binary interactome mapping.
  findings:
  - statement: Methodological study on interactome mapping quality assessment
    supporting_text: "Here we describe a framework that uses an empirically-based
      approach to rigorously dissect quality parameters"
  - statement: No specific information about ADAMTSL4 function
- id: PMID:21989719
  title: ADAMTSL4, a secreted glycoprotein widely distributed in the eye, binds 
    fibrillin-1 microfibrils and accelerates microfibril biogenesis.
  findings:
  - statement: Key study establishing ADAMTSL4's core function
    supporting_text: "ADAMTSL4 is a secreted glycoprotein that is widely distributed
      in the human eye"
  - statement: Demonstrates binding to fibrillin-1 microfibrils
    supporting_text: "ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM
      of these cells"
  - statement: Shows ADAMTSL4 accelerates microfibril biogenesis
    supporting_text: "Enhanced fibrillin-1 deposition in the presence of ADAMTSL4"
  - statement: Establishes ECM localization in the eye
- id: PMID:23088713
  title: Protein interactions of the transcription factor Hoxa1.
  findings:
  - statement: Y2H screen identified ADAMTSL4 among 59 Hoxa1 interactors
    supporting_text: "To investigate the mode of action of mammalian Hoxa1, we characterized
      its interactome by a systematic yeast two-hybrid screening against ~12,200 ORF-derived
      polypeptides"
  - statement: Biological relevance of this interaction to ADAMTSL4 function is 
      unclear
- id: PMID:25037231
  title: Extracellular matrix signatures of human primary metastatic colon 
    cancers and their metastases to liver.
  findings:
  - statement: Proteomic study detecting ADAMTSL4 in ECM-enriched fractions
    supporting_text: "We have used enrichment of extracellular matrix (ECM) from human
      patient samples and proteomics to define the ECM composition of primary colon
      carcinomas and their metastases to liver"
  - statement: Confirms ECM localization
- id: PMID:28327460
  title: Comprehensive proteomic characterization of stem cell-derived 
    extracellular matrices.
  findings:
  - statement: Mass spectrometry detection of ADAMTSL4 in ECM preparations
    supporting_text: "Here, we characterized and compared the protein composition
      of ECM produced in vitro by bone marrow-derived MSC, adipose-derived MSC and
      neonatal fibroblasts from different donors, employing quantitative proteomic
      methods"
  - statement: Confirms ECM localization
- id: PMID:29758265
  title: Interactions between lysyl oxidases and ADAMTS proteins suggest a novel
    crosstalk between two extracellular matrix families.
  findings:
  - statement: Y2H screen identified ADAMTSL4 as LOX binding protein
    supporting_text: "A yeast two-hybrid screen to identify lysyl oxidase (LOX) binding
      proteins identified ADAMTSL4 as a potential interactor"
  - statement: Suggests functional crosstalk between ECM protein families
- id: Reactome:R-HSA-5173005
  title: B3GALTL transfers glucose to O-fucosyl-proteins
  findings:
  - statement: ADAMTSL4 TSR domains undergo O-glucosylation in ER
- id: Reactome:R-HSA-5173192
  title: POFUT2 transfers fucose to TSR domain-containing proteins
  findings:
  - statement: ADAMTSL4 TSR domains undergo O-fucosylation by POFUT2
- id: Reactome:R-HSA-6785565
  title: Defective B3GALTL does not transfer glucose to O-fucosyl-proteins
  findings:
  - statement: Pathway relevant to ADAMTSL4 glycosylation
- id: PMID:19200529
  title: A homozygous mutation in ADAMTSL4 causes autosomal-recessive isolated 
    ectopia lentis.
  findings:
  - statement: Establishes ADAMTSL4 as disease gene for ectopia lentis
    supporting_text: "mutations in ADAMTSL4 are responsible for autosomal-recessive
      simple ectopia lentis"
  - statement: Demonstrates zonular fiber function
- id: file:genes/human/ADAMTSL4/ADAMTSL4-deep-research-falcon.md
  title: Deep research summary for ADAMTSL4
  findings:
  - statement: ADAMTSL4 is a matricellular regulator of fibrillin microfibril 
      organization
    supporting_text: "ADAMTSL4 contributes to fibrillin-rich microfibril assembly
      and zonule stabilization"

core_functions:
- description: >
    ADAMTSL4 binds fibrillin-1 microfibrils and promotes their biogenesis and
    organization in the ECM of the lens zonule. It functions as a matricellular
    adaptor/modulator rather than an enzyme (it lacks the catalytic metalloprotease
    domain of ADAMTS proteases).
  molecular_function:
    id: GO:0050840
    label: extracellular matrix binding
  directly_involved_in:
  - id: GO:0030198
    label: extracellular matrix organization
  locations:
  - id: GO:0001527
    label: microfibril
  - id: GO:0005788
    label: endoplasmic reticulum lumen
  supported_by:
  - reference_id: PMID:21989719
    supporting_text: "ADAMTSL4 colocalized with fibrillin-1 microfibrils in the ECM
      of these cells"

proposed_new_terms: []

suggested_questions:
- question: Does ADAMTSL4 directly crosslink fibrillin-1 microfibrils or does it
    recruit crosslinking enzymes like LOX?
- question: What is the specific binding interface between ADAMTSL4 and 
    fibrillin-1?
- question: Are there tissue-specific isoforms of ADAMTSL4 with different 
    functions?

suggested_experiments:
- description: Structural studies (cryo-EM or X-ray) of ADAMTSL4 bound to 
    fibrillin-1 microfibrils to determine binding interface
  hypothesis: ADAMTSL4 binds fibrillin-1 through its TSR domains
  experiment_type: structural biology
- description: Conditional knockout studies to assess ADAMTSL4 function in 
    non-ocular tissues
  hypothesis: ADAMTSL4 may have additional ECM organizing functions outside the 
    lens zonule
  experiment_type: mouse genetics
- description: Proteomics to identify the complete ADAMTSL4 interactome in lens 
    zonule tissue
  hypothesis: ADAMTSL4 interacts with additional ECM proteins beyond fibrillin-1
  experiment_type: mass spectrometry proteomics

ADAMTSL4

Gene Description

Existing Annotations Review

Core Functions

ADAMTSL4 binds fibrillin-1 microfibrils and promotes their biogenesis and organization in the ECM of the lens zonule. It functions as a matricellular adaptor/modulator rather than an enzyme (it lacks the catalytic metalloprotease domain of ADAMTS proteases).

References

Suggested Questions for Experts

Suggested Experiments

📚 Additional Documentation

Deep Research Falcon

Question

Gene Research for Functional Annotation

⚠️ CRITICAL: Gene/Protein Identification Context

Target Gene/Protein Identity (from UniProt):

MANDATORY VERIFICATION STEPS:

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

Research Target:

Output

Gene Research for Functional Annotation

⚠️ CRITICAL: Gene/Protein Identification Context

Target Gene/Protein Identity (from UniProt):

MANDATORY VERIFICATION STEPS:

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

Research Target:

Citations

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