{"gene":"FAM53C","run_date":"2026-06-09T23:54:43","timeline":{"discoveries":[{"year":2000,"finding":"C5ORF6 (FAM53C) was cloned and found to encode a 392-amino-acid nuclear protein (~43 kDa) containing a bipartite nuclear localization signal (NLS) and a proline-rich sequence near the N-terminus; the gene spans ~11 kb with 5 exons and is ubiquitously expressed.","method":"cDNA cloning, genomic structure analysis, sequence analysis","journal":"Genomics","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — structural/sequence characterization of the gene and predicted protein features, single study but foundational cloning work","pmids":["11087669"],"is_preprint":false},{"year":2023,"finding":"FAM53C was identified as a novel binding partner of DYRK1A kinase; it binds directly to the catalytic (kinase) domain of DYRK1A, distinct from the binding site of DCAF7/WDR68 (which binds the N-terminal domain), and a tri-protein complex of FAM53C–DYRK1A–DCAF7/WDR68 was demonstrated.","method":"Co-immunoprecipitation, pulldown assays, domain-mapping experiments","journal":"Life science alliance","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal Co-IP, domain mapping, and orthogonal biochemical assays in a single focused study; independently replicated in later eLife paper (PMID:42059432)","pmids":["37802655","42059432"],"is_preprint":false},{"year":2023,"finding":"FAM53C binding to DYRK1A inhibited DYRK1A autophosphorylation activity and kinase activity toward an exogenous substrate (MAPT/Tau) in vitro.","method":"In vitro kinase assay with purified proteins","journal":"Life science alliance","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro kinase assay directly demonstrating inhibitory activity, replicated conceptually in PMID:42059432 and PMID:39713326","pmids":["37802655"],"is_preprint":false},{"year":2023,"finding":"Co-expression of FAM53C with DYRK1A induced cytoplasmic re-localization of DYRK1A (which normally accumulates in the nucleus when overexpressed), demonstrating a cytoplasmic anchoring function of FAM53C for DYRK1A; FAM53C binding to DYRK1A also suppressed DYRK1A-dependent nuclear localization of DCAF7/WDR68.","method":"Fluorescence imaging of co-expressed proteins, subcellular fractionation","journal":"Life science alliance","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct imaging of subcellular localization with functional consequence demonstrated, single lab but multiple orthogonal readouts","pmids":["37802655"],"is_preprint":false},{"year":2023,"finding":"FAM53C also binds to the DYRK1A-related kinase DYRK1B in an Hsp90/Cdc37-independent manner.","method":"Co-immunoprecipitation","journal":"Life science alliance","confidence":"Medium","confidence_rationale":"Tier 3 / Weak — single Co-IP result, single lab, limited mechanistic follow-up for DYRK1B interaction","pmids":["37802655"],"is_preprint":false},{"year":2024,"finding":"FAM53C is required for the G1/S cell cycle transition; FAM53C knockdown causes G1 arrest, and FAM53C acts upstream of the CyclinD-CDK4/6-RB axis and p53 in regulating this transition. DYRK1A kinase inhibition rescues the G1 arrest induced by FAM53C knockdown, placing FAM53C functionally upstream of DYRK1A in cell cycle control.","method":"Cancer Dependency Map analysis, siRNA knockdown, cell cycle FACS, pharmacological DYRK1A inhibition, epistasis experiments","journal":"eLife (also bioRxiv preprint)","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (KD, pharmacological rescue, epistasis), replicated between preprint and peer-reviewed eLife publication","pmids":["39713326","42059432"],"is_preprint":false},{"year":2024,"finding":"FAM53C knockout human cortical organoids display increased cell cycle arrest and growth defects, confirming FAM53C's role in cell cycle progression in a human tissue model.","method":"CRISPR knockout in human cortical organoids, growth assays, cell cycle analysis","journal":"eLife (also bioRxiv preprint)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — organoid KO with defined cellular phenotype, single lab, confirmed in both preprint and peer-reviewed paper","pmids":["39713326","42059432"],"is_preprint":false}],"current_model":"FAM53C is a cytoplasmic anchoring protein that binds directly to the catalytic domain of DYRK1A kinase, inhibits its autophosphorylation and substrate (Tau) phosphorylation activity, sequesters DYRK1A in the cytoplasm (preventing nuclear accumulation of both DYRK1A and DCAF7/WDR68), and acts upstream of the CyclinD-CDK4/6-RB axis and p53 to promote the G1/S cell cycle transition, such that FAM53C loss causes G1 arrest that can be rescued by pharmacological DYRK1A inhibition."},"narrative":{"mechanistic_narrative":"FAM53C is a cytoplasmic regulator of the DYRK1A kinase that couples kinase sequestration to control of the G1/S cell cycle transition [PMID:37802655, PMID:42059432, PMID:39713326]. It binds directly to the catalytic domain of DYRK1A—at a site distinct from that used by DCAF7/WDR68, which engages the kinase's N-terminal domain—forming a tri-protein FAM53C–DYRK1A–DCAF7/WDR68 complex [PMID:37802655, PMID:42059432], and inhibits DYRK1A autophosphorylation and its phosphorylation of the substrate Tau/MAPT [PMID:37802655]. Functionally, FAM53C anchors DYRK1A in the cytoplasm, redistributing the kinase away from the nucleus and concomitantly suppressing DYRK1A-dependent nuclear accumulation of DCAF7/WDR68 [PMID:37802655]. FAM53C is required for the G1/S transition, acting upstream of the CyclinD–CDK4/6–RB axis and p53; its loss causes G1 arrest that is rescued by pharmacological DYRK1A inhibition, placing FAM53C functionally upstream of DYRK1A in cell cycle control [PMID:39713326, PMID:42059432], with knockout human cortical organoids showing increased cell cycle arrest and growth defects [PMID:39713326, PMID:42059432]. Although first described as a nuclear protein with a bipartite NLS [PMID:11087669], its characterized mechanism centers on cytoplasmic DYRK1A regulation; it also binds the related kinase DYRK1B [PMID:37802655].","teleology":[{"year":2000,"claim":"Established the basic molecular identity of the gene, defining the protein it encodes and its predicted features before any functional role was known.","evidence":"cDNA cloning, genomic structure and sequence analysis of C5ORF6/FAM53C","pmids":["11087669"],"confidence":"Medium","gaps":["No molecular function assigned","Predicted nuclear localization not functionally tested","No interacting partners identified"]},{"year":2023,"claim":"Identified DYRK1A as a direct binding partner and mapped the interaction to the kinase catalytic domain, revealing a tripartite assembly with DCAF7/WDR68 and assigning FAM53C its first molecular role.","evidence":"Co-immunoprecipitation, pulldown, and domain-mapping assays","pmids":["37802655","42059432"],"confidence":"High","gaps":["Structural basis of catalytic-domain binding not resolved","Stoichiometry of the tri-protein complex not defined"]},{"year":2023,"claim":"Demonstrated that FAM53C binding is functionally inhibitory toward DYRK1A, showing it blocks both autophosphorylation and substrate (Tau) phosphorylation.","evidence":"In vitro kinase assay with purified proteins","pmids":["37802655"],"confidence":"High","gaps":["Whether inhibition occurs at physiological stoichiometry in cells not established","Other DYRK1A substrates not tested"]},{"year":2023,"claim":"Showed FAM53C acts as a cytoplasmic anchor, redistributing DYRK1A out of the nucleus and suppressing DYRK1A-driven nuclear accumulation of DCAF7/WDR68, linking complex formation to spatial control of the kinase.","evidence":"Fluorescence imaging of co-expressed proteins and subcellular fractionation","pmids":["37802655"],"confidence":"High","gaps":["Reliance on overexpression for localization readouts","Mechanism of cytoplasmic retention unknown"]},{"year":2023,"claim":"Extended FAM53C binding to the related kinase DYRK1B, indicating the interaction is not restricted to DYRK1A.","evidence":"Co-immunoprecipitation","pmids":["37802655"],"confidence":"Medium","gaps":["Single Co-IP without functional follow-up","Effect on DYRK1B activity or localization untested"]},{"year":2024,"claim":"Placed FAM53C in cell cycle control, demonstrating it is required for the G1/S transition upstream of the CyclinD-CDK4/6-RB axis and p53, with DYRK1A inhibition rescuing FAM53C-loss arrest to establish the epistatic relationship.","evidence":"Dependency Map analysis, siRNA knockdown, cell cycle FACS, pharmacological DYRK1A inhibition, and epistasis; organoid CRISPR knockout","pmids":["39713326","42059432"],"confidence":"High","gaps":["Direct biochemical link between DYRK1A inhibition and CyclinD/p53 regulation not delineated","Whether cytoplasmic anchoring or kinase inhibition drives the cell cycle effect not separated"]},{"year":null,"claim":"How FAM53C-mediated DYRK1A sequestration mechanistically connects to the CyclinD-CDK4/6-RB and p53 nodes, and whether its originally predicted nuclear role is physiologically relevant, remain unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of the FAM53C-DYRK1A interface","Effectors bridging DYRK1A to CyclinD/p53 not identified","Reconciliation of cytoplasmic function with predicted NLS-driven nuclear localization absent"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[2,3]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[2]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[3]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0]}],"pathway":[{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[5,6]}],"complexes":["FAM53C-DYRK1A-DCAF7/WDR68 complex"],"partners":["DYRK1A","DCAF7","DYRK1B"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9NYF3","full_name":"Protein FAM53C","aliases":[],"length_aa":392,"mass_kda":43.1,"function":"","subcellular_location":"","url":"https://www.uniprot.org/uniprotkb/Q9NYF3/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/FAM53C","classification":"Not Classified","n_dependent_lines":8,"n_total_lines":1208,"dependency_fraction":0.006622516556291391},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"PLK1","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/FAM53C","total_profiled":1310},"omim":[{"mim_id":"617229","title":"FAMILY WITH SEQUENCE SIMILARITY 53, MEMBER A; FAM53A","url":"https://www.omim.org/entry/617229"},{"mim_id":"609372","title":"FAMILY WITH SEQUENCE SIMILARITY 53, MEMBER C; FAM53C","url":"https://www.omim.org/entry/609372"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"","locations":[],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/FAM53C"},"hgnc":{"alias_symbol":[],"prev_symbol":["C5orf6"]},"alphafold":{"accession":"Q9NYF3","domains":[],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9NYF3","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9NYF3-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9NYF3-F1-predicted_aligned_error_v6.png","plddt_mean":52.12},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=FAM53C","jax_strain_url":"https://www.jax.org/strain/search?query=FAM53C"},"sequence":{"accession":"Q9NYF3","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9NYF3.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9NYF3/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9NYF3"}},"corpus_meta":[{"pmid":"11087669","id":"PMC_11087669","title":"cDNA cloning and genomic structure of three genes localized to human chromosome band 5q31 encoding potential nuclear proteins.","date":"2000","source":"Genomics","url":"https://pubmed.ncbi.nlm.nih.gov/11087669","citation_count":18,"is_preprint":false},{"pmid":"37900285","id":"PMC_37900285","title":"Insights from the protein interaction Universe of the multifunctional \"Goldilocks\" kinase DYRK1A.","date":"2023","source":"Frontiers in cell and developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/37900285","citation_count":17,"is_preprint":false},{"pmid":"37802655","id":"PMC_37802655","title":"Identification of FAM53C as a cytosolic-anchoring inhibitory binding protein of the kinase DYRK1A.","date":"2023","source":"Life science alliance","url":"https://pubmed.ncbi.nlm.nih.gov/37802655","citation_count":9,"is_preprint":false},{"pmid":"35266657","id":"PMC_35266657","title":"Integrative global co-expression analysis identifies key microRNA-target gene networks as key blood biomarkers for obesity.","date":"2022","source":"Minerva medica","url":"https://pubmed.ncbi.nlm.nih.gov/35266657","citation_count":6,"is_preprint":false},{"pmid":"39713326","id":"PMC_39713326","title":"THE FAM53C/DYRK1A axis regulates the G1/S transition of the cell cycle.","date":"2024","source":"bioRxiv : the preprint server for biology","url":"https://pubmed.ncbi.nlm.nih.gov/39713326","citation_count":1,"is_preprint":false},{"pmid":"42059432","id":"PMC_42059432","title":"The FAM53C/DYRK1A axis regulates the G1/S transition of the cell cycle.","date":"2026","source":"eLife","url":"https://pubmed.ncbi.nlm.nih.gov/42059432","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":5172,"output_tokens":1628,"usd":0.019968,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":8395,"output_tokens":2314,"usd":0.049912,"stage2_stop_reason":"end_turn"},"total_usd":0.06988,"stage1_batch_id":"msgbatch_01AsR7g8dGTEiEw9U83bJeWn","stage2_batch_id":"msgbatch_01YV5ZyxtFNUZEjxRcpd9jzb","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2000,\n      \"finding\": \"C5ORF6 (FAM53C) was cloned and found to encode a 392-amino-acid nuclear protein (~43 kDa) containing a bipartite nuclear localization signal (NLS) and a proline-rich sequence near the N-terminus; the gene spans ~11 kb with 5 exons and is ubiquitously expressed.\",\n      \"method\": \"cDNA cloning, genomic structure analysis, sequence analysis\",\n      \"journal\": \"Genomics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — structural/sequence characterization of the gene and predicted protein features, single study but foundational cloning work\",\n      \"pmids\": [\"11087669\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"FAM53C was identified as a novel binding partner of DYRK1A kinase; it binds directly to the catalytic (kinase) domain of DYRK1A, distinct from the binding site of DCAF7/WDR68 (which binds the N-terminal domain), and a tri-protein complex of FAM53C–DYRK1A–DCAF7/WDR68 was demonstrated.\",\n      \"method\": \"Co-immunoprecipitation, pulldown assays, domain-mapping experiments\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal Co-IP, domain mapping, and orthogonal biochemical assays in a single focused study; independently replicated in later eLife paper (PMID:42059432)\",\n      \"pmids\": [\"37802655\", \"42059432\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"FAM53C binding to DYRK1A inhibited DYRK1A autophosphorylation activity and kinase activity toward an exogenous substrate (MAPT/Tau) in vitro.\",\n      \"method\": \"In vitro kinase assay with purified proteins\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro kinase assay directly demonstrating inhibitory activity, replicated conceptually in PMID:42059432 and PMID:39713326\",\n      \"pmids\": [\"37802655\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Co-expression of FAM53C with DYRK1A induced cytoplasmic re-localization of DYRK1A (which normally accumulates in the nucleus when overexpressed), demonstrating a cytoplasmic anchoring function of FAM53C for DYRK1A; FAM53C binding to DYRK1A also suppressed DYRK1A-dependent nuclear localization of DCAF7/WDR68.\",\n      \"method\": \"Fluorescence imaging of co-expressed proteins, subcellular fractionation\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct imaging of subcellular localization with functional consequence demonstrated, single lab but multiple orthogonal readouts\",\n      \"pmids\": [\"37802655\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"FAM53C also binds to the DYRK1A-related kinase DYRK1B in an Hsp90/Cdc37-independent manner.\",\n      \"method\": \"Co-immunoprecipitation\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP result, single lab, limited mechanistic follow-up for DYRK1B interaction\",\n      \"pmids\": [\"37802655\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"FAM53C is required for the G1/S cell cycle transition; FAM53C knockdown causes G1 arrest, and FAM53C acts upstream of the CyclinD-CDK4/6-RB axis and p53 in regulating this transition. DYRK1A kinase inhibition rescues the G1 arrest induced by FAM53C knockdown, placing FAM53C functionally upstream of DYRK1A in cell cycle control.\",\n      \"method\": \"Cancer Dependency Map analysis, siRNA knockdown, cell cycle FACS, pharmacological DYRK1A inhibition, epistasis experiments\",\n      \"journal\": \"eLife (also bioRxiv preprint)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (KD, pharmacological rescue, epistasis), replicated between preprint and peer-reviewed eLife publication\",\n      \"pmids\": [\"39713326\", \"42059432\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"FAM53C knockout human cortical organoids display increased cell cycle arrest and growth defects, confirming FAM53C's role in cell cycle progression in a human tissue model.\",\n      \"method\": \"CRISPR knockout in human cortical organoids, growth assays, cell cycle analysis\",\n      \"journal\": \"eLife (also bioRxiv preprint)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — organoid KO with defined cellular phenotype, single lab, confirmed in both preprint and peer-reviewed paper\",\n      \"pmids\": [\"39713326\", \"42059432\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"FAM53C is a cytoplasmic anchoring protein that binds directly to the catalytic domain of DYRK1A kinase, inhibits its autophosphorylation and substrate (Tau) phosphorylation activity, sequesters DYRK1A in the cytoplasm (preventing nuclear accumulation of both DYRK1A and DCAF7/WDR68), and acts upstream of the CyclinD-CDK4/6-RB axis and p53 to promote the G1/S cell cycle transition, such that FAM53C loss causes G1 arrest that can be rescued by pharmacological DYRK1A inhibition.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"FAM53C is a cytoplasmic regulator of the DYRK1A kinase that couples kinase sequestration to control of the G1/S cell cycle transition [#1, #5]. It binds directly to the catalytic domain of DYRK1A—at a site distinct from that used by DCAF7/WDR68, which engages the kinase's N-terminal domain—forming a tri-protein FAM53C–DYRK1A–DCAF7/WDR68 complex [#1], and inhibits DYRK1A autophosphorylation and its phosphorylation of the substrate Tau/MAPT [#2]. Functionally, FAM53C anchors DYRK1A in the cytoplasm, redistributing the kinase away from the nucleus and concomitantly suppressing DYRK1A-dependent nuclear accumulation of DCAF7/WDR68 [#3]. FAM53C is required for the G1/S transition, acting upstream of the CyclinD–CDK4/6–RB axis and p53; its loss causes G1 arrest that is rescued by pharmacological DYRK1A inhibition, placing FAM53C functionally upstream of DYRK1A in cell cycle control [#5], with knockout human cortical organoids showing increased cell cycle arrest and growth defects [#6]. Although first described as a nuclear protein with a bipartite NLS [#0], its characterized mechanism centers on cytoplasmic DYRK1A regulation; it also binds the related kinase DYRK1B [#4].\",\n  \"teleology\": [\n    {\n      \"year\": 2000,\n      \"claim\": \"Established the basic molecular identity of the gene, defining the protein it encodes and its predicted features before any functional role was known.\",\n      \"evidence\": \"cDNA cloning, genomic structure and sequence analysis of C5ORF6/FAM53C\",\n      \"pmids\": [\"11087669\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No molecular function assigned\", \"Predicted nuclear localization not functionally tested\", \"No interacting partners identified\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified DYRK1A as a direct binding partner and mapped the interaction to the kinase catalytic domain, revealing a tripartite assembly with DCAF7/WDR68 and assigning FAM53C its first molecular role.\",\n      \"evidence\": \"Co-immunoprecipitation, pulldown, and domain-mapping assays\",\n      \"pmids\": [\"37802655\", \"42059432\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of catalytic-domain binding not resolved\", \"Stoichiometry of the tri-protein complex not defined\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Demonstrated that FAM53C binding is functionally inhibitory toward DYRK1A, showing it blocks both autophosphorylation and substrate (Tau) phosphorylation.\",\n      \"evidence\": \"In vitro kinase assay with purified proteins\",\n      \"pmids\": [\"37802655\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether inhibition occurs at physiological stoichiometry in cells not established\", \"Other DYRK1A substrates not tested\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Showed FAM53C acts as a cytoplasmic anchor, redistributing DYRK1A out of the nucleus and suppressing DYRK1A-driven nuclear accumulation of DCAF7/WDR68, linking complex formation to spatial control of the kinase.\",\n      \"evidence\": \"Fluorescence imaging of co-expressed proteins and subcellular fractionation\",\n      \"pmids\": [\"37802655\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Reliance on overexpression for localization readouts\", \"Mechanism of cytoplasmic retention unknown\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Extended FAM53C binding to the related kinase DYRK1B, indicating the interaction is not restricted to DYRK1A.\",\n      \"evidence\": \"Co-immunoprecipitation\",\n      \"pmids\": [\"37802655\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single Co-IP without functional follow-up\", \"Effect on DYRK1B activity or localization untested\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Placed FAM53C in cell cycle control, demonstrating it is required for the G1/S transition upstream of the CyclinD-CDK4/6-RB axis and p53, with DYRK1A inhibition rescuing FAM53C-loss arrest to establish the epistatic relationship.\",\n      \"evidence\": \"Dependency Map analysis, siRNA knockdown, cell cycle FACS, pharmacological DYRK1A inhibition, and epistasis; organoid CRISPR knockout\",\n      \"pmids\": [\"39713326\", \"42059432\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct biochemical link between DYRK1A inhibition and CyclinD/p53 regulation not delineated\", \"Whether cytoplasmic anchoring or kinase inhibition drives the cell cycle effect not separated\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How FAM53C-mediated DYRK1A sequestration mechanistically connects to the CyclinD-CDK4/6-RB and p53 nodes, and whether its originally predicted nuclear role is physiologically relevant, remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model of the FAM53C-DYRK1A interface\", \"Effectors bridging DYRK1A to CyclinD/p53 not identified\", \"Reconciliation of cytoplasmic function with predicted NLS-driven nuclear localization absent\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [2, 3]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [2]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [3]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [5, 6]}\n    ],\n    \"complexes\": [\"FAM53C-DYRK1A-DCAF7/WDR68 complex\"],\n    \"partners\": [\"DYRK1A\", \"DCAF7\", \"DYRK1B\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"faith_supported":5,"faith_total":5,"faith_pct":100.0}}