{"gene":"ZFAND6","run_date":"2026-06-11T09:02:06","timeline":{"discoveries":[{"year":2000,"finding":"AWP1/ZFAND6 specifically interacts with serine/threonine kinase PRK1 in vivo, as demonstrated by co-immunoprecipitation of mouse AWP1 with rat PRK1 in COS-1 cells. AWP1 possesses a zf-A20 zinc finger domain at its N-terminal and a zf-AN1 zinc finger domain at its C-terminal.","method":"Co-immunoprecipitation in COS-1 cells; domain annotation by sequence analysis","journal":"Gene","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — single reciprocal Co-IP, single lab, but consistently replicated domain characterization","pmids":["11054541"],"is_preprint":false},{"year":2005,"finding":"AWP1/ZFAND6 fusion protein localizes diffusely in the cytoplasm of 293 cells, as shown by GFP-AWP1 fluorescence microscopy.","method":"GFP fusion protein live fluorescence microscopy in transfected 293 cells","journal":"Di 1 jun yi da xue xue bao","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single method (overexpression fluorescence), no functional consequence linked","pmids":["15698998"],"is_preprint":false},{"year":2011,"finding":"AWP1/ZFAND6 functions as a cofactor of Pex6 AAA ATPase in peroxisomal Pex5 receptor export: recombinant AWP1 stimulated Pex5 export in an in vitro assay, anti-AWP1 antibody inhibited export, AWP1 interacted with Pex6 (but not Pex1-Pex6 complexes), and its A20 zinc-finger domain preferentially bound cysteine-monoubiquitinated Pex5. RNAi knockdown of AWP1 impaired PTS1-protein import and reduced Pex5 stability.","method":"In vitro Pex5 export assay with recombinant protein; antibody inhibition; co-immunoprecipitation; domain-deletion binding analysis; RNAi knockdown with functional readout","journal":"Traffic (Copenhagen, Denmark)","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — in vitro reconstituted export assay plus mutagenesis/domain mapping plus RNAi phenotype, multiple orthogonal methods in single study","pmids":["21980954"],"is_preprint":false},{"year":2011,"finding":"AWP1/ZFAND6 directly interacts with the C-terminal TRAF domain of TRAF2 (identified by yeast two-hybrid and confirmed by binding assays). The AN1 domain of AWP1 mediates the functional interaction with TRAF2, while the A20 domain is responsible for negative regulation of NF-κB activation. AWP1 knockdown decreases NF-κB activity and increases TNFα-induced apoptosis; overexpression of AWP1 inhibits NF-κB activation and leads to A20 domain-dependent increase in K-48 ubiquitination of TRAF2.","method":"Yeast two-hybrid screening; domain-deletion binding experiments; shRNA knockdown with NF-κB reporter assay and apoptosis readout; overexpression with ubiquitination assays","journal":"The international journal of biochemistry & cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — yeast two-hybrid plus domain mapping plus functional knockdown/overexpression with multiple orthogonal readouts in single study","pmids":["21810480"],"is_preprint":false},{"year":2013,"finding":"In Xenopus, XAWP1 depletion impairs neural crest induction by FGF8a and Wnt8 signaling: NC marker expression was reduced, beta-catenin stability and Wnt-responsive reporter activity were impaired in AWP1-depleted cells, and NC induction was rescued by constitutively active beta-catenin or TCF3. This places XAWP1 as a mediator of Wnt signaling upstream of beta-catenin stability in neural crest specification.","method":"Morpholino knockdown in Xenopus embryos; epistasis with constitutively active beta-catenin/TCF3; luciferase Wnt reporter; marker gene expression analysis","journal":"The International journal of developmental biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis with rescue experiment and reporter assay, single lab, Xenopus ortholog study","pmids":["24623074"],"is_preprint":false},{"year":2021,"finding":"AWP1/ZFAND6 loss-of-function in MCF-7 breast cancer cells augments TNF-α-induced NF-κB activation via ROS-dependent signaling: AWP1 knockout increased Nox1 expression, elevated ROS levels, and enhanced NF-κB activation, leading to increased cell migration and EMT-related gene expression. TNF-α-mediated chemotactic migration in AWP1-KO cells was abrogated by NF-κB inhibitor and a ROS scavenger.","method":"CRISPR/Cas9 knockout; shRNA knockdown; NF-κB pathway analysis; ROS measurement; pharmacological inhibition rescue","journal":"Frontiers in oncology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — CRISPR KO plus pharmacological rescue, single lab, two orthogonal inhibition approaches","pmids":["33816268"],"is_preprint":false},{"year":2023,"finding":"The Drosophila ortholog of AWP1/ZFAND6, Doctor No (Drn), is required for JAK/STAT signaling by promoting endocytic trafficking and degradation of the JAK/STAT receptor Domeless (Dome). In drn mutant embryos, Dome accumulates in intracellular compartments containing ubiquitylated cargoes, impairing JAK/STAT activation and left-right asymmetric nuclear rearrangement in the anterior gut.","method":"Drosophila genetic loss-of-function (homozygous mutant); co-localization imaging of Drn and Dome; analysis of receptor accumulation in ubiquitylated cargo compartments; epistasis with JAK/STAT signaling","journal":"Development (Cambridge, England)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO epistasis plus receptor trafficking imaging, single lab, Drosophila ortholog study","pmids":["36861793"],"is_preprint":false},{"year":2024,"finding":"ZFAND6 promotes TRAF2-dependent mitophagy to maintain mitochondrial homeostasis: ZFAND6 bridges a TRAF2-cIAP1 interaction and mediates recruitment of TRAF2 to damaged mitochondria, initiating ubiquitin-dependent mitophagy. Deletion of ZFAND6 in macrophages impairs mitophagy, causing accumulation of damaged mitochondria and ROS, release of mitochondrial DNA into the cytoplasm, and spontaneous activation of cGAS-STING-dependent interferon-stimulated gene expression.","method":"ZFAND6 deletion in bone marrow-derived macrophages; mitophagy assays; ROS measurement; Co-IP of TRAF2-cIAP1; mitochondrial recruitment imaging; cGAS-STING pathway functional readout","journal":"iScience","confidence":"High","confidence_rationale":"Tier 2 / Strong — KO macrophages with multiple orthogonal mechanistic readouts (Co-IP, mitochondrial recruitment, pathway activation), single lab but rigorous multi-method study","pmids":["39811672"],"is_preprint":false}],"current_model":"ZFAND6/AWP1 is a cytoplasmic ubiquitin-binding zinc finger protein (containing A20 and AN1 domains) that acts as a multifunctional adaptor: it facilitates peroxisomal Pex5 receptor export by binding cysteine-monoubiquitinated Pex5 and Pex6 AAA ATPase; it modulates TNF-α-induced NF-κB signaling by interacting with TRAF2 (via its AN1 domain) and promoting K48-ubiquitination of TRAF2 (via its A20 domain); and it promotes TRAF2-cIAP1-dependent mitophagy by recruiting TRAF2 to damaged mitochondria, thereby preventing cGAS-STING-driven innate immune activation."},"narrative":{"mechanistic_narrative":"ZFAND6 (AWP1) is a cytoplasmic ubiquitin-binding adaptor that uses its tandem A20 and AN1 zinc-finger domains to couple ubiquitinated cargo to AAA-ATPase- and TRAF-dependent machinery across peroxisomal protein import, TNF-α/NF-κB signaling, and mitochondrial quality control [PMID:21980954, PMID:21810480, PMID:39811672]. In peroxisomal receptor recycling, it acts as a cofactor of the Pex6 AAA ATPase: its A20 domain preferentially binds cysteine-monoubiquitinated Pex5, and recombinant ZFAND6 stimulates Pex5 export while its depletion impairs PTS1-protein import and destabilizes Pex5 [PMID:21980954]. In TNF-α signaling, ZFAND6 binds the C-terminal TRAF domain of TRAF2 through its AN1 domain and negatively regulates NF-κB activation through its A20 domain, which promotes K48-linked ubiquitination of TRAF2; loss of ZFAND6 augments NF-κB activity through a Nox1/ROS-dependent route and drives migration and EMT gene expression [PMID:21810480, PMID:33816268]. In mitochondrial homeostasis, ZFAND6 bridges a TRAF2–cIAP1 interaction and recruits TRAF2 to damaged mitochondria to initiate ubiquitin-dependent mitophagy, so that its deletion in macrophages causes accumulation of damaged mitochondria, ROS, cytoplasmic mitochondrial DNA, and spontaneous cGAS-STING-driven interferon-stimulated gene expression [PMID:39811672]. Studies of metazoan orthologs extend this adaptor role to developmental signaling, where ZFAND6 supports Wnt/β-catenin-dependent neural crest induction in Xenopus and JAK/STAT receptor trafficking in Drosophila [PMID:24623074, PMID:36861793].","teleology":[{"year":2000,"claim":"Established ZFAND6/AWP1 as a real protein with a defined domain architecture and a first physical partner, framing it as a kinase-associated factor.","evidence":"Co-immunoprecipitation of mouse AWP1 with rat PRK1 in COS-1 cells plus sequence-based A20/AN1 domain annotation","pmids":["11054541"],"confidence":"Medium","gaps":["Functional consequence of the PRK1 interaction not defined","Single reciprocal Co-IP without orthogonal validation","No link between PRK1 binding and later-described pathways"]},{"year":2005,"claim":"Placed the protein in the cytoplasm, consistent with an adaptor that acts on cytosolic and membrane-associated machinery rather than in the nucleus.","evidence":"GFP-AWP1 live fluorescence microscopy in transfected 293 cells","pmids":["15698998"],"confidence":"Low","gaps":["Overexpression artifact possible","No endogenous localization","No functional readout tied to localization"]},{"year":2011,"claim":"Defined a concrete biochemical function: ZFAND6 reads cysteine-monoubiquitinated Pex5 through its A20 domain and acts as a Pex6 cofactor in peroxisomal receptor export.","evidence":"In vitro reconstituted Pex5 export assay with recombinant protein, antibody inhibition, domain-deletion binding, and RNAi with import readout","pmids":["21980954"],"confidence":"High","gaps":["How A20 ubiquitin recognition couples to Pex6 ATPase cycle mechanistically unresolved","Whether peroxisomal and TNF/TRAF roles compete for the same protein pool unknown"]},{"year":2011,"claim":"Resolved a separate signaling function and assigned domain division of labor: AN1 mediates TRAF2 binding while A20 drives K48-ubiquitination of TRAF2 to dampen NF-κB.","evidence":"Yeast two-hybrid, domain-deletion binding, shRNA knockdown with NF-κB reporter and apoptosis assays, and overexpression ubiquitination assays","pmids":["21810480"],"confidence":"High","gaps":["Whether ZFAND6 itself ligates ubiquitin or recruits an E3 not determined","Stoichiometry and kinetics of TRAF2 turnover not measured"]},{"year":2013,"claim":"Extended the adaptor role to developmental signaling, showing the ortholog acts upstream of β-catenin stability in Wnt-dependent neural crest induction.","evidence":"Morpholino knockdown in Xenopus with constitutively active β-catenin/TCF3 rescue and Wnt luciferase reporter","pmids":["24623074"],"confidence":"Medium","gaps":["Molecular target linking ZFAND6 to β-catenin stability unidentified","Conservation of this Wnt role in mammals untested"]},{"year":2021,"claim":"Defined the mechanism of NF-κB suppression in a cancer context, linking ZFAND6 loss to Nox1/ROS-driven NF-κB activation and EMT.","evidence":"CRISPR/Cas9 knockout and shRNA in MCF-7 cells with ROS measurement and NF-κB inhibitor/ROS-scavenger rescue","pmids":["33816268"],"confidence":"Medium","gaps":["Mechanistic link between TRAF2 regulation and Nox1 induction unresolved","Single cell-line context"]},{"year":2023,"claim":"Clarified the ortholog's role in receptor trafficking, showing it promotes endocytic degradation of the JAK/STAT receptor Domeless to enable signaling.","evidence":"Drosophila loss-of-function genetics, Drn/Dome co-localization imaging, and analysis of receptor accumulation in ubiquitylated cargo compartments","pmids":["36861793"],"confidence":"Medium","gaps":["Direct ubiquitin-cargo binding by Drn not demonstrated biochemically","Relevance to mammalian receptor trafficking unestablished"]},{"year":2024,"claim":"Integrated ZFAND6 into mitochondrial quality control, showing it bridges TRAF2-cIAP1 and recruits TRAF2 to damaged mitochondria to drive mitophagy and restrain cGAS-STING immunity.","evidence":"ZFAND6 deletion in bone marrow-derived macrophages with mitophagy and ROS assays, TRAF2-cIAP1 Co-IP, mitochondrial recruitment imaging, and cGAS-STING readout","pmids":["39811672"],"confidence":"High","gaps":["Whether ZFAND6 A20/AN1 ubiquitin chemistry is required for mitochondrial recruitment not dissected","Identity of the mitochondrial ubiquitin signal read by ZFAND6 unknown"]},{"year":null,"claim":"How a single A20/AN1 adaptor partitions among peroxisomal export, TNF/NF-κB regulation, and mitophagy, and whether these reflect one unifying ubiquitin-reading mechanism, remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of A20/AN1 ubiquitin recognition","No quantitative partitioning of ZFAND6 across its functional contexts","Whether ZFAND6 carries intrinsic catalytic activity or only scaffolds E3s unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[2,3,7]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[3]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[1]},{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[7]}],"pathway":[{"term_id":"GO:0005777","term_label":"peroxisome","supporting_discovery_ids":[2]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[3,5]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[7]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[7]}],"complexes":[],"partners":["TRAF2","PEX6","PEX5","BIRC2","PKN1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q6FIF0","full_name":"AN1-type zinc finger protein 6","aliases":["Associated with PRK1 protein","Zinc finger A20 domain-containing protein 3"],"length_aa":208,"mass_kda":22.6,"function":"Involved in regulation of TNF induced NF-kappa-B activation and apoptosis. Involved in modulation of 'Lys-48'-linked polyubiquitination status of TRAF2 and decreases association of TRAF2 with RIPK1. Required for PTS1 target sequence-dependent protein import into peroxisomes and PEX5 stability; may cooperate with PEX6. In vitro involved in PEX5 export from the cytosol to peroxisomes (By similarity)","subcellular_location":"Cytoplasm","url":"https://www.uniprot.org/uniprotkb/Q6FIF0/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/ZFAND6","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/ZFAND6","total_profiled":1310},"omim":[{"mim_id":"610183","title":"ZINC FINGER AN1 DOMAIN-CONTAINING PROTEIN 6; ZFAND6","url":"https://www.omim.org/entry/610183"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/ZFAND6"},"hgnc":{"alias_symbol":["ZFAND5B","AWP1"],"prev_symbol":["ZA20D3"]},"alphafold":{"accession":"Q6FIF0","domains":[{"cath_id":"1.20.5.4770","chopping":"10-45","consensus_level":"medium","plddt":90.0858,"start":10,"end":45},{"cath_id":"4.10.1110.10","chopping":"147-199","consensus_level":"medium","plddt":94.7051,"start":147,"end":199}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q6FIF0","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q6FIF0-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q6FIF0-F1-predicted_aligned_error_v6.png","plddt_mean":71.62},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ZFAND6","jax_strain_url":"https://www.jax.org/strain/search?query=ZFAND6"},"sequence":{"accession":"Q6FIF0","fasta_url":"https://rest.uniprot.org/uniprotkb/Q6FIF0.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q6FIF0/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q6FIF0"}},"corpus_meta":[{"pmid":"21980954","id":"PMC_21980954","title":"AWP1/ZFAND6 functions in Pex5 export by interacting with cys-monoubiquitinated Pex5 and Pex6 AAA ATPase.","date":"2011","source":"Traffic (Copenhagen, Denmark)","url":"https://pubmed.ncbi.nlm.nih.gov/21980954","citation_count":46,"is_preprint":false},{"pmid":"11054541","id":"PMC_11054541","title":"Cloning and characterization of AWP1, a novel protein that associates with serine/threonine kinase PRK1 in vivo.","date":"2000","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/11054541","citation_count":35,"is_preprint":false},{"pmid":"21810480","id":"PMC_21810480","title":"AWP1 binds to tumor necrosis factor receptor-associated factor 2 (TRAF2) and is involved in TRAF2-mediated nuclear factor-kappaB signaling.","date":"2011","source":"The international journal of biochemistry & cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/21810480","citation_count":26,"is_preprint":false},{"pmid":"24623074","id":"PMC_24623074","title":"Essential role of AWP1 in neural crest specification in Xenopus.","date":"2013","source":"The International journal of developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/24623074","citation_count":5,"is_preprint":false},{"pmid":"36980809","id":"PMC_36980809","title":"Genetic Variants of HNF4A, WFS1, DUSP9, FTO, and ZFAND6 Genes Are Associated with Prediabetes Susceptibility and Inflammatory Markers in the Saudi Arabian Population.","date":"2023","source":"Genes","url":"https://pubmed.ncbi.nlm.nih.gov/36980809","citation_count":5,"is_preprint":false},{"pmid":"36861793","id":"PMC_36861793","title":"The Drosophila AWP1 ortholog Doctor No regulates JAK/STAT signaling for left-right asymmetry in the gut by promoting receptor endocytosis.","date":"2023","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/36861793","citation_count":4,"is_preprint":false},{"pmid":"33816268","id":"PMC_33816268","title":"AWP1 Restrains the Aggressive Behavior of Breast Cancer Cells Induced by TNF-α.","date":"2021","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/33816268","citation_count":3,"is_preprint":false},{"pmid":"40200350","id":"PMC_40200350","title":"Silencing circRNA-ZFAND6 induces trophoblast apoptosis by activating the mitochondrial pathway through the miR-575/SOD2 axis in unexplained recurrent spontaneous abortion.","date":"2025","source":"BMC women's health","url":"https://pubmed.ncbi.nlm.nih.gov/40200350","citation_count":3,"is_preprint":false},{"pmid":"39811672","id":"PMC_39811672","title":"ZFAND6 promotes TRAF2-dependent mitophagy to restrain cGAS-STING signaling.","date":"2024","source":"iScience","url":"https://pubmed.ncbi.nlm.nih.gov/39811672","citation_count":2,"is_preprint":false},{"pmid":"15698998","id":"PMC_15698998","title":"[Construction of GFP-AWP1 fusion gene vector and its expression in 293 cells].","date":"2005","source":"Di 1 jun yi da xue xue bao = Academic journal of the first medical college of PLA","url":"https://pubmed.ncbi.nlm.nih.gov/15698998","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":7459,"output_tokens":2394,"usd":0.029143,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":9523,"output_tokens":3203,"usd":0.063845,"stage2_stop_reason":"end_turn"},"total_usd":0.092988,"stage1_batch_id":"msgbatch_01UT1AahFPCAyn2uVweS7A9z","stage2_batch_id":"msgbatch_01HuKWtKNT4Pqj1bc8eEP5RV","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2000,\n      \"finding\": \"AWP1/ZFAND6 specifically interacts with serine/threonine kinase PRK1 in vivo, as demonstrated by co-immunoprecipitation of mouse AWP1 with rat PRK1 in COS-1 cells. AWP1 possesses a zf-A20 zinc finger domain at its N-terminal and a zf-AN1 zinc finger domain at its C-terminal.\",\n      \"method\": \"Co-immunoprecipitation in COS-1 cells; domain annotation by sequence analysis\",\n      \"journal\": \"Gene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — single reciprocal Co-IP, single lab, but consistently replicated domain characterization\",\n      \"pmids\": [\"11054541\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"AWP1/ZFAND6 fusion protein localizes diffusely in the cytoplasm of 293 cells, as shown by GFP-AWP1 fluorescence microscopy.\",\n      \"method\": \"GFP fusion protein live fluorescence microscopy in transfected 293 cells\",\n      \"journal\": \"Di 1 jun yi da xue xue bao\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single method (overexpression fluorescence), no functional consequence linked\",\n      \"pmids\": [\"15698998\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"AWP1/ZFAND6 functions as a cofactor of Pex6 AAA ATPase in peroxisomal Pex5 receptor export: recombinant AWP1 stimulated Pex5 export in an in vitro assay, anti-AWP1 antibody inhibited export, AWP1 interacted with Pex6 (but not Pex1-Pex6 complexes), and its A20 zinc-finger domain preferentially bound cysteine-monoubiquitinated Pex5. RNAi knockdown of AWP1 impaired PTS1-protein import and reduced Pex5 stability.\",\n      \"method\": \"In vitro Pex5 export assay with recombinant protein; antibody inhibition; co-immunoprecipitation; domain-deletion binding analysis; RNAi knockdown with functional readout\",\n      \"journal\": \"Traffic (Copenhagen, Denmark)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — in vitro reconstituted export assay plus mutagenesis/domain mapping plus RNAi phenotype, multiple orthogonal methods in single study\",\n      \"pmids\": [\"21980954\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"AWP1/ZFAND6 directly interacts with the C-terminal TRAF domain of TRAF2 (identified by yeast two-hybrid and confirmed by binding assays). The AN1 domain of AWP1 mediates the functional interaction with TRAF2, while the A20 domain is responsible for negative regulation of NF-κB activation. AWP1 knockdown decreases NF-κB activity and increases TNFα-induced apoptosis; overexpression of AWP1 inhibits NF-κB activation and leads to A20 domain-dependent increase in K-48 ubiquitination of TRAF2.\",\n      \"method\": \"Yeast two-hybrid screening; domain-deletion binding experiments; shRNA knockdown with NF-κB reporter assay and apoptosis readout; overexpression with ubiquitination assays\",\n      \"journal\": \"The international journal of biochemistry & cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — yeast two-hybrid plus domain mapping plus functional knockdown/overexpression with multiple orthogonal readouts in single study\",\n      \"pmids\": [\"21810480\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"In Xenopus, XAWP1 depletion impairs neural crest induction by FGF8a and Wnt8 signaling: NC marker expression was reduced, beta-catenin stability and Wnt-responsive reporter activity were impaired in AWP1-depleted cells, and NC induction was rescued by constitutively active beta-catenin or TCF3. This places XAWP1 as a mediator of Wnt signaling upstream of beta-catenin stability in neural crest specification.\",\n      \"method\": \"Morpholino knockdown in Xenopus embryos; epistasis with constitutively active beta-catenin/TCF3; luciferase Wnt reporter; marker gene expression analysis\",\n      \"journal\": \"The International journal of developmental biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis with rescue experiment and reporter assay, single lab, Xenopus ortholog study\",\n      \"pmids\": [\"24623074\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"AWP1/ZFAND6 loss-of-function in MCF-7 breast cancer cells augments TNF-α-induced NF-κB activation via ROS-dependent signaling: AWP1 knockout increased Nox1 expression, elevated ROS levels, and enhanced NF-κB activation, leading to increased cell migration and EMT-related gene expression. TNF-α-mediated chemotactic migration in AWP1-KO cells was abrogated by NF-κB inhibitor and a ROS scavenger.\",\n      \"method\": \"CRISPR/Cas9 knockout; shRNA knockdown; NF-κB pathway analysis; ROS measurement; pharmacological inhibition rescue\",\n      \"journal\": \"Frontiers in oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — CRISPR KO plus pharmacological rescue, single lab, two orthogonal inhibition approaches\",\n      \"pmids\": [\"33816268\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"The Drosophila ortholog of AWP1/ZFAND6, Doctor No (Drn), is required for JAK/STAT signaling by promoting endocytic trafficking and degradation of the JAK/STAT receptor Domeless (Dome). In drn mutant embryos, Dome accumulates in intracellular compartments containing ubiquitylated cargoes, impairing JAK/STAT activation and left-right asymmetric nuclear rearrangement in the anterior gut.\",\n      \"method\": \"Drosophila genetic loss-of-function (homozygous mutant); co-localization imaging of Drn and Dome; analysis of receptor accumulation in ubiquitylated cargo compartments; epistasis with JAK/STAT signaling\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO epistasis plus receptor trafficking imaging, single lab, Drosophila ortholog study\",\n      \"pmids\": [\"36861793\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ZFAND6 promotes TRAF2-dependent mitophagy to maintain mitochondrial homeostasis: ZFAND6 bridges a TRAF2-cIAP1 interaction and mediates recruitment of TRAF2 to damaged mitochondria, initiating ubiquitin-dependent mitophagy. Deletion of ZFAND6 in macrophages impairs mitophagy, causing accumulation of damaged mitochondria and ROS, release of mitochondrial DNA into the cytoplasm, and spontaneous activation of cGAS-STING-dependent interferon-stimulated gene expression.\",\n      \"method\": \"ZFAND6 deletion in bone marrow-derived macrophages; mitophagy assays; ROS measurement; Co-IP of TRAF2-cIAP1; mitochondrial recruitment imaging; cGAS-STING pathway functional readout\",\n      \"journal\": \"iScience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — KO macrophages with multiple orthogonal mechanistic readouts (Co-IP, mitochondrial recruitment, pathway activation), single lab but rigorous multi-method study\",\n      \"pmids\": [\"39811672\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ZFAND6/AWP1 is a cytoplasmic ubiquitin-binding zinc finger protein (containing A20 and AN1 domains) that acts as a multifunctional adaptor: it facilitates peroxisomal Pex5 receptor export by binding cysteine-monoubiquitinated Pex5 and Pex6 AAA ATPase; it modulates TNF-α-induced NF-κB signaling by interacting with TRAF2 (via its AN1 domain) and promoting K48-ubiquitination of TRAF2 (via its A20 domain); and it promotes TRAF2-cIAP1-dependent mitophagy by recruiting TRAF2 to damaged mitochondria, thereby preventing cGAS-STING-driven innate immune activation.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"ZFAND6 (AWP1) is a cytoplasmic ubiquitin-binding adaptor that uses its tandem A20 and AN1 zinc-finger domains to couple ubiquitinated cargo to AAA-ATPase- and TRAF-dependent machinery across peroxisomal protein import, TNF-α/NF-κB signaling, and mitochondrial quality control [#2, #3, #7]. In peroxisomal receptor recycling, it acts as a cofactor of the Pex6 AAA ATPase: its A20 domain preferentially binds cysteine-monoubiquitinated Pex5, and recombinant ZFAND6 stimulates Pex5 export while its depletion impairs PTS1-protein import and destabilizes Pex5 [#2]. In TNF-α signaling, ZFAND6 binds the C-terminal TRAF domain of TRAF2 through its AN1 domain and negatively regulates NF-κB activation through its A20 domain, which promotes K48-linked ubiquitination of TRAF2; loss of ZFAND6 augments NF-κB activity through a Nox1/ROS-dependent route and drives migration and EMT gene expression [#3, #5]. In mitochondrial homeostasis, ZFAND6 bridges a TRAF2–cIAP1 interaction and recruits TRAF2 to damaged mitochondria to initiate ubiquitin-dependent mitophagy, so that its deletion in macrophages causes accumulation of damaged mitochondria, ROS, cytoplasmic mitochondrial DNA, and spontaneous cGAS-STING-driven interferon-stimulated gene expression [#7]. Studies of metazoan orthologs extend this adaptor role to developmental signaling, where ZFAND6 supports Wnt/β-catenin-dependent neural crest induction in Xenopus and JAK/STAT receptor trafficking in Drosophila [#4, #6].\",\n  \"teleology\": [\n    {\n      \"year\": 2000,\n      \"claim\": \"Established ZFAND6/AWP1 as a real protein with a defined domain architecture and a first physical partner, framing it as a kinase-associated factor.\",\n      \"evidence\": \"Co-immunoprecipitation of mouse AWP1 with rat PRK1 in COS-1 cells plus sequence-based A20/AN1 domain annotation\",\n      \"pmids\": [\"11054541\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequence of the PRK1 interaction not defined\", \"Single reciprocal Co-IP without orthogonal validation\", \"No link between PRK1 binding and later-described pathways\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Placed the protein in the cytoplasm, consistent with an adaptor that acts on cytosolic and membrane-associated machinery rather than in the nucleus.\",\n      \"evidence\": \"GFP-AWP1 live fluorescence microscopy in transfected 293 cells\",\n      \"pmids\": [\"15698998\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Overexpression artifact possible\", \"No endogenous localization\", \"No functional readout tied to localization\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Defined a concrete biochemical function: ZFAND6 reads cysteine-monoubiquitinated Pex5 through its A20 domain and acts as a Pex6 cofactor in peroxisomal receptor export.\",\n      \"evidence\": \"In vitro reconstituted Pex5 export assay with recombinant protein, antibody inhibition, domain-deletion binding, and RNAi with import readout\",\n      \"pmids\": [\"21980954\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How A20 ubiquitin recognition couples to Pex6 ATPase cycle mechanistically unresolved\", \"Whether peroxisomal and TNF/TRAF roles compete for the same protein pool unknown\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Resolved a separate signaling function and assigned domain division of labor: AN1 mediates TRAF2 binding while A20 drives K48-ubiquitination of TRAF2 to dampen NF-κB.\",\n      \"evidence\": \"Yeast two-hybrid, domain-deletion binding, shRNA knockdown with NF-κB reporter and apoptosis assays, and overexpression ubiquitination assays\",\n      \"pmids\": [\"21810480\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ZFAND6 itself ligates ubiquitin or recruits an E3 not determined\", \"Stoichiometry and kinetics of TRAF2 turnover not measured\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Extended the adaptor role to developmental signaling, showing the ortholog acts upstream of β-catenin stability in Wnt-dependent neural crest induction.\",\n      \"evidence\": \"Morpholino knockdown in Xenopus with constitutively active β-catenin/TCF3 rescue and Wnt luciferase reporter\",\n      \"pmids\": [\"24623074\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular target linking ZFAND6 to β-catenin stability unidentified\", \"Conservation of this Wnt role in mammals untested\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Defined the mechanism of NF-κB suppression in a cancer context, linking ZFAND6 loss to Nox1/ROS-driven NF-κB activation and EMT.\",\n      \"evidence\": \"CRISPR/Cas9 knockout and shRNA in MCF-7 cells with ROS measurement and NF-κB inhibitor/ROS-scavenger rescue\",\n      \"pmids\": [\"33816268\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanistic link between TRAF2 regulation and Nox1 induction unresolved\", \"Single cell-line context\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Clarified the ortholog's role in receptor trafficking, showing it promotes endocytic degradation of the JAK/STAT receptor Domeless to enable signaling.\",\n      \"evidence\": \"Drosophila loss-of-function genetics, Drn/Dome co-localization imaging, and analysis of receptor accumulation in ubiquitylated cargo compartments\",\n      \"pmids\": [\"36861793\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct ubiquitin-cargo binding by Drn not demonstrated biochemically\", \"Relevance to mammalian receptor trafficking unestablished\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Integrated ZFAND6 into mitochondrial quality control, showing it bridges TRAF2-cIAP1 and recruits TRAF2 to damaged mitochondria to drive mitophagy and restrain cGAS-STING immunity.\",\n      \"evidence\": \"ZFAND6 deletion in bone marrow-derived macrophages with mitophagy and ROS assays, TRAF2-cIAP1 Co-IP, mitochondrial recruitment imaging, and cGAS-STING readout\",\n      \"pmids\": [\"39811672\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ZFAND6 A20/AN1 ubiquitin chemistry is required for mitochondrial recruitment not dissected\", \"Identity of the mitochondrial ubiquitin signal read by ZFAND6 unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How a single A20/AN1 adaptor partitions among peroxisomal export, TNF/NF-κB regulation, and mitophagy, and whether these reflect one unifying ubiquitin-reading mechanism, remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model of A20/AN1 ubiquitin recognition\", \"No quantitative partitioning of ZFAND6 across its functional contexts\", \"Whether ZFAND6 carries intrinsic catalytic activity or only scaffolds E3s unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [2, 3, 7]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [3]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [1]},\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [7]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"GO:0005777\", \"supporting_discovery_ids\": [2]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [3, 5]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [7]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [7]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"TRAF2\", \"PEX6\", \"PEX5\", \"BIRC2\", \"PKN1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":5,"faith_total":5,"faith_pct":100.0}}