{"gene":"AZI2","run_date":"2026-06-09T22:02:44","timeline":{"discoveries":[{"year":2013,"finding":"AZI2 is critical for GM-CSF-induced differentiation of conventional dendritic cells (cDCs) from bone marrow cells, controlling GM-CSF-induced cell cycling via TBK1. AZI2-deficient mice show severe defects in cytokine production and T cell activation, while AZI2 overexpression enhances cDC generation and T cell activation.","method":"AZI2 knockout mice, bone marrow differentiation assays, overexpression experiments, in vitro and in vivo T cell activation assays","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — loss-of-function KO and gain-of-function overexpression with defined cellular phenotypes, replicated in vitro and in vivo","pmids":["23610142"],"is_preprint":false},{"year":2015,"finding":"AZI2 regulates osteoclast survival by inhibiting c-Src activity through regulation of Hsp90 chaperone activation, and does so indirectly by interacting with the Hsp90 co-chaperone Cdc37. AZI2 knockout mice develop severe osteoporosis due to augmented c-Src activation and increased osteoclast longevity, which is reversed by c-Src inhibitor administration.","method":"AZI2 knockout mice, c-Src activity assays, Hsp90/Cdc37 interaction studies, c-Src inhibitor rescue experiments, in vivo bone density measurements","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — KO mouse model with defined mechanistic pathway (AZI2→Cdc37→Hsp90→c-Src), pharmacological rescue, multiple orthogonal methods","pmids":["25691576"],"is_preprint":false},{"year":2020,"finding":"FIP200 interacts with the TBK1 adaptor protein AZI2, and FIP200 ablation leads to AZI2-dependent activation of TBK1 and downstream IFN signaling. This non-canonical autophagy function of FIP200 suppresses T-cell recruitment in breast cancer tumors.","method":"Co-immunoprecipitation (FIP200-AZI2 interaction), genetic mouse models with FIP200 ablation, AZI2 perturbation assays, TBK1/IFN pathway readouts","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal interaction demonstrated, functional consequence shown in vivo, single lab","pmids":["32580962"],"is_preprint":false},{"year":2022,"finding":"AZI2 positively regulates type I interferon production during influenza infection by promoting interactions between TBK1 and TANK. AZI2 deficiency worsens influenza-induced pathology and reduces survival in mice.","method":"AZI2 germline knockout mice, influenza lung infection model, immune precipitation, immunofluorescence, luciferase reporter assays, immunoblotting","journal":"Pathogens and disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — KO mouse phenotype and co-IP interaction data, single lab, multiple methods","pmids":["35595469"],"is_preprint":false},{"year":2023,"finding":"AZI2 accumulates in puncta with selective autophagy cargo receptors upon RB1CC1/FIP200 depletion. This accumulation is required for TBK1 activation. AZI2 then mediates downstream activation of DDX3X, increasing its interaction with IRF3 to drive transcription of pro-inflammatory chemokines, promoting CD8+ T cell infiltration.","method":"RB1CC1 depletion, AZI2 puncta imaging, co-immunoprecipitation (AZI2-DDX3X-IRF3), TBK1 activation assays, chemokine expression assays, pharmacological screen (Lys05), tumor CD8+ T cell infiltration measurement","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (imaging, Co-IP, functional assays), single lab","pmids":["37733921"],"is_preprint":false},{"year":2024,"finding":"AZI2 is recruited to damaged mitochondria during Parkin-mediated mitophagy and is required for NDP52-driven mitophagy (but not OPTN-driven mitophagy). AZI2 is phosphorylated at S318 during mitophagy, and impairment of this phosphorylation slightly inhibits mitochondrial degradation.","method":"AZI2 and TBKBP1 knockout constructs, OPTN knockout, mitophagy assays, phosphorylation site mutagenesis (S318), mitochondrial recruitment imaging","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — KO constructs with specific pathway dissection, phosphosite identified, single lab with multiple orthogonal methods","pmids":["39276928"],"is_preprint":false},{"year":2024,"finding":"TANK and AZI2 both recruit TBK1 to the TNF receptor signaling complex to suppress TNF-induced RIPK1-dependent cell death, but with distinct kinetics: TANK binds directly to NEMO (early recruitment), while AZI2 is recruited later via deubiquitinase A20. Double-knockout of TANK and AZI2 causes severe autoinflammation rescued by TNFR1 deficiency or kinase-dead RIPK1.","method":"Single and double knockout mouse models, TNFR1 deficiency rescue, kinase-dead RIPK1 rescue, interaction studies (TANK-NEMO, AZI2-A20), TNF receptor signaling complex analysis","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic epistasis with multiple rescue experiments, direct interaction mapping distinguishing TANK vs AZI2 recruitment mechanisms, in vivo validation","pmids":["39562788"],"is_preprint":false}],"current_model":"AZI2 (also known as NAP1) is a TBK1 adaptor protein that is recruited to the TNF receptor signaling complex (via A20) to activate TBK1 and suppress RIPK1-dependent cell death; it promotes type I interferon production by facilitating TBK1-TANK interactions; it is required for NDP52-driven mitophagy at damaged mitochondria (where it is phosphorylated at S318); it accumulates at selective autophagy cargo receptor complexes to activate TBK1-DDX3X-IRF3 pro-inflammatory signaling; and it regulates osteoclast survival by inhibiting c-Src via interaction with the Hsp90 co-chaperone Cdc37."},"narrative":{"mechanistic_narrative":"AZI2 (NAP1) is a TBK1 adaptor protein that couples the kinase TBK1 to inflammatory, autophagic, and cell-death signaling complexes, thereby shaping innate immune output and immune cell development [PMID:23610142, PMID:39562788]. At the TNF receptor signaling complex, AZI2 is recruited later than TANK via the deubiquitinase A20 to deliver TBK1 and suppress TNF-induced RIPK1-dependent cell death; combined loss of TANK and AZI2 produces severe autoinflammation that is rescued by TNFR1 deficiency or kinase-dead RIPK1 [PMID:39562788]. In antiviral signaling, AZI2 promotes type I interferon production by facilitating TBK1–TANK interactions, and its loss worsens influenza pathology [PMID:35595469]. AZI2 also operates at selective autophagy machinery: it accumulates with cargo receptors upon RB1CC1/FIP200 depletion to activate TBK1 and drive a DDX3X–IRF3 pro-inflammatory program that promotes CD8+ T cell infiltration [PMID:32580962, PMID:37733921], and it is recruited to damaged mitochondria where it is phosphorylated at S318 and required specifically for NDP52-driven, but not OPTN-driven, mitophagy [PMID:39276928]. Beyond TBK1-centered functions, AZI2 restrains osteoclast survival by inhibiting c-Src activity through interaction with the Hsp90 co-chaperone Cdc37, and its loss causes severe osteoporosis reversible by c-Src inhibition [PMID:25691576].","teleology":[{"year":2013,"claim":"Established AZI2 as a physiologically required factor for dendritic cell development, linking it to TBK1-dependent control of GM-CSF-induced cell cycling and downstream T cell activation.","evidence":"AZI2 knockout mice, bone marrow differentiation assays, and overexpression with in vitro/in vivo T cell activation readouts","pmids":["23610142"],"confidence":"High","gaps":["Did not resolve the molecular interface between AZI2 and TBK1 in this context","Mechanism connecting TBK1 to GM-CSF cell-cycle control not defined"]},{"year":2015,"claim":"Revealed a TBK1-independent role for AZI2 in skeletal homeostasis, showing it limits osteoclast survival by suppressing c-Src through the Hsp90 co-chaperone Cdc37.","evidence":"AZI2 knockout mice with osteoporosis phenotype, c-Src activity assays, Hsp90/Cdc37 interaction studies, and c-Src inhibitor rescue","pmids":["25691576"],"confidence":"High","gaps":["Direct biochemical nature of the AZI2-Cdc37 interaction not structurally defined","Whether this function intersects with AZI2's TBK1 adaptor role is unaddressed"]},{"year":2020,"claim":"Connected AZI2 to a non-canonical autophagy axis by showing FIP200 binds AZI2 and that FIP200 loss triggers AZI2-dependent TBK1/IFN activation with consequences for antitumor immunity.","evidence":"Co-immunoprecipitation of FIP200-AZI2, FIP200-ablation mouse models, and TBK1/IFN pathway readouts in breast cancer","pmids":["32580962"],"confidence":"Medium","gaps":["Single-lab interaction data without broader structural mapping","How FIP200 normally restrains AZI2-TBK1 activation is not mechanistically resolved"]},{"year":2022,"claim":"Defined how AZI2 drives antiviral interferon output, showing it promotes TBK1-TANK association during influenza infection to support type I IFN production and host survival.","evidence":"AZI2 knockout mice in an influenza lung model, immunoprecipitation, immunofluorescence, and luciferase reporter assays","pmids":["35595469"],"confidence":"Medium","gaps":["Single-lab study; reciprocal validation of TBK1-TANK bridging is limited","Whether AZI2 directly stabilizes the TBK1-TANK complex versus indirectly is unclear"]},{"year":2023,"claim":"Extended the autophagy-inflammation link by showing AZI2 accumulates at stalled cargo-receptor complexes to activate TBK1 and a DDX3X-IRF3 transcriptional program promoting CD8+ T cell infiltration.","evidence":"RB1CC1 depletion, AZI2 puncta imaging, AZI2-DDX3X-IRF3 co-IP, chemokine assays, pharmacological screen, and tumor T cell measurements","pmids":["37733921"],"confidence":"Medium","gaps":["Single-lab data; the trigger for AZI2 puncta accumulation is not fully defined","Direct versus indirect DDX3X engagement not biochemically separated"]},{"year":2024,"claim":"Placed AZI2 in selective mitophagy, demonstrating it is recruited to damaged mitochondria and phosphorylated at S318 to support NDP52-driven but not OPTN-driven degradation.","evidence":"AZI2/TBKBP1 and OPTN knockout constructs, mitophagy assays, and S318 phosphosite mutagenesis with recruitment imaging","pmids":["39276928"],"confidence":"Medium","gaps":["Kinase responsible for S318 phosphorylation not identified","S318 mutation only slightly impairs degradation, leaving its functional weight uncertain"]},{"year":2024,"claim":"Resolved how AZI2 and TANK cooperate at the TNF receptor complex, showing distinct recruitment routes (TANK via NEMO early, AZI2 via A20 later) that jointly suppress RIPK1-dependent cell death.","evidence":"Single and double knockout mice, TNFR1-deficiency and kinase-dead RIPK1 rescues, and interaction mapping of TANK-NEMO and AZI2-A20","pmids":["39562788"],"confidence":"High","gaps":["Structural basis of the AZI2-A20 interaction not defined","How AZI2-delivered TBK1 mechanistically restrains RIPK1 not fully detailed"]},{"year":null,"claim":"It remains unresolved how AZI2's distinct functions — TBK1 adaptor activity across TNFR, antiviral, and autophagy contexts versus Cdc37/Hsp90-mediated c-Src regulation — are integrated or differentially deployed across cell types.","evidence":"No single study in the corpus unifies these parallel mechanisms","pmids":[],"confidence":"Medium","gaps":["No structural model of AZI2 domains assigning regions to TBK1 versus Cdc37 binding","Regulatory logic selecting between AZI2's pro-survival and pro-death/pro-inflammatory roles unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[3,4,6]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[1]}],"localization":[{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[5]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[4]}],"pathway":[{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[0,3,6]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[4,5]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[6]}],"complexes":["TNF receptor signaling complex"],"partners":["TBK1","TANK","A20","CDC37","FIP200","DDX3X","NDP52","IRF3"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9H6S1","full_name":"5-azacytidine-induced protein 2","aliases":["NF-kappa-B-activating kinase-associated protein 1","Nak-associated protein 1","Nap1","TILP"],"length_aa":392,"mass_kda":44.9,"function":"Adapter protein which binds TBK1 and IKBKE playing a role in antiviral innate immunity (PubMed:14560022, PubMed:21931631). Activates serine/threonine-protein kinase TBK1 and facilitates its oligomerization (PubMed:14560022, PubMed:21931631). Enhances the phosphorylation of NF-kappa-B p65 subunit RELA by TBK1 (PubMed:14560022, PubMed:21931631). Promotes TBK1-induced as well as TNF or PMA-induced activation of NF-kappa-B (PubMed:14560022, PubMed:21931631). Participates in IFNB promoter activation via TICAM1 (PubMed:15611223)","subcellular_location":"Cytoplasm","url":"https://www.uniprot.org/uniprotkb/Q9H6S1/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/AZI2","classification":"Not Classified","n_dependent_lines":3,"n_total_lines":1208,"dependency_fraction":0.0024834437086092716},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/AZI2","total_profiled":1310},"omim":[{"mim_id":"609916","title":"5-@AZACYTIDINE-INDUCED PROTEIN 2; AZI2","url":"https://www.omim.org/entry/609916"},{"mim_id":"604834","title":"TANK-BINDING KINASE 1; TBK1","url":"https://www.omim.org/entry/604834"},{"mim_id":"300457","title":"NHS ACTIN REMODELING REGULATOR; NHS","url":"https://www.omim.org/entry/300457"}],"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/AZI2"},"hgnc":{"alias_symbol":["NAP1","FLJ21939","AZ2"],"prev_symbol":[]},"alphafold":{"accession":"Q9H6S1","domains":[{"cath_id":"1.20.5","chopping":"34-153","consensus_level":"medium","plddt":93.218,"start":34,"end":153}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9H6S1","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9H6S1-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9H6S1-F1-predicted_aligned_error_v6.png","plddt_mean":68.62},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=AZI2","jax_strain_url":"https://www.jax.org/strain/search?query=AZI2"},"sequence":{"accession":"Q9H6S1","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9H6S1.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9H6S1/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9H6S1"}},"corpus_meta":[{"pmid":"32580962","id":"PMC_32580962","title":"FIP200 Suppresses Immune Checkpoint Therapy Responses in Breast Cancers by Limiting AZI2/TBK1/IRF Signaling Independent of Its Canonical Autophagy Function.","date":"2020","source":"Cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/32580962","citation_count":31,"is_preprint":false},{"pmid":"31730934","id":"PMC_31730934","title":"The novel thioredoxin reductase inhibitor A-Z2 triggers intrinsic apoptosis and shows efficacy in the treatment of acute myeloid leukemia.","date":"2019","source":"Free radical biology & medicine","url":"https://pubmed.ncbi.nlm.nih.gov/31730934","citation_count":22,"is_preprint":false},{"pmid":"23610142","id":"PMC_23610142","title":"Critical role of AZI2 in GM-CSF-induced dendritic cell differentiation.","date":"2013","source":"Journal of immunology (Baltimore, Md. : 1950)","url":"https://pubmed.ncbi.nlm.nih.gov/23610142","citation_count":20,"is_preprint":false},{"pmid":"25691576","id":"PMC_25691576","title":"5-Azacytidine-induced protein 2 (AZI2) regulates bone mass by fine-tuning osteoclast survival.","date":"2015","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/25691576","citation_count":13,"is_preprint":false},{"pmid":"34151127","id":"PMC_34151127","title":"Cycloartane- and Lanostane-Type Triterpenoids from the Resin of Parthenium argentatum AZ-2, a Byproduct of Guayule Rubber Production.","date":"2021","source":"ACS omega","url":"https://pubmed.ncbi.nlm.nih.gov/34151127","citation_count":11,"is_preprint":false},{"pmid":"28983843","id":"PMC_28983843","title":"AZI23'UTR Is a New SLC6A3 Downregulator Associated with an Epistatic Protection Against Substance Use Disorders.","date":"2017","source":"Molecular neurobiology","url":"https://pubmed.ncbi.nlm.nih.gov/28983843","citation_count":10,"is_preprint":false},{"pmid":"37733921","id":"PMC_37733921","title":"AZI2 mediates TBK1 activation at unresolved selective autophagy cargo receptor complexes with implications for CD8 T-cell infiltration in breast cancer.","date":"2023","source":"Autophagy","url":"https://pubmed.ncbi.nlm.nih.gov/37733921","citation_count":9,"is_preprint":false},{"pmid":"39276928","id":"PMC_39276928","title":"TBK1 adaptor AZI2/NAP1 regulates NDP52-driven mitochondrial autophagy.","date":"2024","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/39276928","citation_count":7,"is_preprint":false},{"pmid":"34173327","id":"PMC_34173327","title":"Functional validation of a finding from a mouse genome-wide association study shows that Azi2 influences the acute locomotor stimulant response to methamphetamine.","date":"2021","source":"Genes, brain, and behavior","url":"https://pubmed.ncbi.nlm.nih.gov/34173327","citation_count":4,"is_preprint":false},{"pmid":"39562788","id":"PMC_39562788","title":"TBK1-associated adapters TANK and AZI2 protect mice against TNF-induced cell death and severe autoinflammatory diseases.","date":"2024","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/39562788","citation_count":3,"is_preprint":false},{"pmid":"35595469","id":"PMC_35595469","title":"AZI2 positively regulates the induction of type I interferon in influenza-trigger pediatric pneumonia.","date":"2022","source":"Pathogens and disease","url":"https://pubmed.ncbi.nlm.nih.gov/35595469","citation_count":3,"is_preprint":false},{"pmid":"9601993","id":"PMC_9601993","title":"Cloning and expression of az2, a putative zinc finger transcription factor from Drosophila melanogaster.","date":"1998","source":"Development genes and evolution","url":"https://pubmed.ncbi.nlm.nih.gov/9601993","citation_count":1,"is_preprint":false},{"pmid":"40731101","id":"PMC_40731101","title":"Isolation and Characterization of Aspergillus niger AZ2 from Pulp and Paper Mill Effluent that Degrade Lignin under Alkaline Conditions.","date":"2025","source":"Current microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/40731101","citation_count":0,"is_preprint":false},{"pmid":"40482988","id":"PMC_40482988","title":"Structural and functional insights into β-glucosidase derived from Thermoproteus sp. AZ2.","date":"2025","source":"Archives of biochemistry and biophysics","url":"https://pubmed.ncbi.nlm.nih.gov/40482988","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":8928,"output_tokens":1932,"usd":0.027882,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":8828,"output_tokens":3032,"usd":0.05997,"stage2_stop_reason":"end_turn"},"total_usd":0.087852,"stage1_batch_id":"msgbatch_0179Z2pxRYBsXi2xADneafRw","stage2_batch_id":"msgbatch_01LaY9ZaVdgjWArcZo9eqQE5","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2013,\n      \"finding\": \"AZI2 is critical for GM-CSF-induced differentiation of conventional dendritic cells (cDCs) from bone marrow cells, controlling GM-CSF-induced cell cycling via TBK1. AZI2-deficient mice show severe defects in cytokine production and T cell activation, while AZI2 overexpression enhances cDC generation and T cell activation.\",\n      \"method\": \"AZI2 knockout mice, bone marrow differentiation assays, overexpression experiments, in vitro and in vivo T cell activation assays\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — loss-of-function KO and gain-of-function overexpression with defined cellular phenotypes, replicated in vitro and in vivo\",\n      \"pmids\": [\"23610142\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"AZI2 regulates osteoclast survival by inhibiting c-Src activity through regulation of Hsp90 chaperone activation, and does so indirectly by interacting with the Hsp90 co-chaperone Cdc37. AZI2 knockout mice develop severe osteoporosis due to augmented c-Src activation and increased osteoclast longevity, which is reversed by c-Src inhibitor administration.\",\n      \"method\": \"AZI2 knockout mice, c-Src activity assays, Hsp90/Cdc37 interaction studies, c-Src inhibitor rescue experiments, in vivo bone density measurements\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — KO mouse model with defined mechanistic pathway (AZI2→Cdc37→Hsp90→c-Src), pharmacological rescue, multiple orthogonal methods\",\n      \"pmids\": [\"25691576\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"FIP200 interacts with the TBK1 adaptor protein AZI2, and FIP200 ablation leads to AZI2-dependent activation of TBK1 and downstream IFN signaling. This non-canonical autophagy function of FIP200 suppresses T-cell recruitment in breast cancer tumors.\",\n      \"method\": \"Co-immunoprecipitation (FIP200-AZI2 interaction), genetic mouse models with FIP200 ablation, AZI2 perturbation assays, TBK1/IFN pathway readouts\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal interaction demonstrated, functional consequence shown in vivo, single lab\",\n      \"pmids\": [\"32580962\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"AZI2 positively regulates type I interferon production during influenza infection by promoting interactions between TBK1 and TANK. AZI2 deficiency worsens influenza-induced pathology and reduces survival in mice.\",\n      \"method\": \"AZI2 germline knockout mice, influenza lung infection model, immune precipitation, immunofluorescence, luciferase reporter assays, immunoblotting\",\n      \"journal\": \"Pathogens and disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KO mouse phenotype and co-IP interaction data, single lab, multiple methods\",\n      \"pmids\": [\"35595469\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"AZI2 accumulates in puncta with selective autophagy cargo receptors upon RB1CC1/FIP200 depletion. This accumulation is required for TBK1 activation. AZI2 then mediates downstream activation of DDX3X, increasing its interaction with IRF3 to drive transcription of pro-inflammatory chemokines, promoting CD8+ T cell infiltration.\",\n      \"method\": \"RB1CC1 depletion, AZI2 puncta imaging, co-immunoprecipitation (AZI2-DDX3X-IRF3), TBK1 activation assays, chemokine expression assays, pharmacological screen (Lys05), tumor CD8+ T cell infiltration measurement\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (imaging, Co-IP, functional assays), single lab\",\n      \"pmids\": [\"37733921\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"AZI2 is recruited to damaged mitochondria during Parkin-mediated mitophagy and is required for NDP52-driven mitophagy (but not OPTN-driven mitophagy). AZI2 is phosphorylated at S318 during mitophagy, and impairment of this phosphorylation slightly inhibits mitochondrial degradation.\",\n      \"method\": \"AZI2 and TBKBP1 knockout constructs, OPTN knockout, mitophagy assays, phosphorylation site mutagenesis (S318), mitochondrial recruitment imaging\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KO constructs with specific pathway dissection, phosphosite identified, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"39276928\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"TANK and AZI2 both recruit TBK1 to the TNF receptor signaling complex to suppress TNF-induced RIPK1-dependent cell death, but with distinct kinetics: TANK binds directly to NEMO (early recruitment), while AZI2 is recruited later via deubiquitinase A20. Double-knockout of TANK and AZI2 causes severe autoinflammation rescued by TNFR1 deficiency or kinase-dead RIPK1.\",\n      \"method\": \"Single and double knockout mouse models, TNFR1 deficiency rescue, kinase-dead RIPK1 rescue, interaction studies (TANK-NEMO, AZI2-A20), TNF receptor signaling complex analysis\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic epistasis with multiple rescue experiments, direct interaction mapping distinguishing TANK vs AZI2 recruitment mechanisms, in vivo validation\",\n      \"pmids\": [\"39562788\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"AZI2 (also known as NAP1) is a TBK1 adaptor protein that is recruited to the TNF receptor signaling complex (via A20) to activate TBK1 and suppress RIPK1-dependent cell death; it promotes type I interferon production by facilitating TBK1-TANK interactions; it is required for NDP52-driven mitophagy at damaged mitochondria (where it is phosphorylated at S318); it accumulates at selective autophagy cargo receptor complexes to activate TBK1-DDX3X-IRF3 pro-inflammatory signaling; and it regulates osteoclast survival by inhibiting c-Src via interaction with the Hsp90 co-chaperone Cdc37.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"AZI2 (NAP1) is a TBK1 adaptor protein that couples the kinase TBK1 to inflammatory, autophagic, and cell-death signaling complexes, thereby shaping innate immune output and immune cell development [#0, #6]. At the TNF receptor signaling complex, AZI2 is recruited later than TANK via the deubiquitinase A20 to deliver TBK1 and suppress TNF-induced RIPK1-dependent cell death; combined loss of TANK and AZI2 produces severe autoinflammation that is rescued by TNFR1 deficiency or kinase-dead RIPK1 [#6]. In antiviral signaling, AZI2 promotes type I interferon production by facilitating TBK1–TANK interactions, and its loss worsens influenza pathology [#3]. AZI2 also operates at selective autophagy machinery: it accumulates with cargo receptors upon RB1CC1/FIP200 depletion to activate TBK1 and drive a DDX3X–IRF3 pro-inflammatory program that promotes CD8+ T cell infiltration [#2, #4], and it is recruited to damaged mitochondria where it is phosphorylated at S318 and required specifically for NDP52-driven, but not OPTN-driven, mitophagy [#5]. Beyond TBK1-centered functions, AZI2 restrains osteoclast survival by inhibiting c-Src activity through interaction with the Hsp90 co-chaperone Cdc37, and its loss causes severe osteoporosis reversible by c-Src inhibition [#1].\",\n  \"teleology\": [\n    {\n      \"year\": 2013,\n      \"claim\": \"Established AZI2 as a physiologically required factor for dendritic cell development, linking it to TBK1-dependent control of GM-CSF-induced cell cycling and downstream T cell activation.\",\n      \"evidence\": \"AZI2 knockout mice, bone marrow differentiation assays, and overexpression with in vitro/in vivo T cell activation readouts\",\n      \"pmids\": [\"23610142\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Did not resolve the molecular interface between AZI2 and TBK1 in this context\",\n        \"Mechanism connecting TBK1 to GM-CSF cell-cycle control not defined\"\n      ]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Revealed a TBK1-independent role for AZI2 in skeletal homeostasis, showing it limits osteoclast survival by suppressing c-Src through the Hsp90 co-chaperone Cdc37.\",\n      \"evidence\": \"AZI2 knockout mice with osteoporosis phenotype, c-Src activity assays, Hsp90/Cdc37 interaction studies, and c-Src inhibitor rescue\",\n      \"pmids\": [\"25691576\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Direct biochemical nature of the AZI2-Cdc37 interaction not structurally defined\",\n        \"Whether this function intersects with AZI2's TBK1 adaptor role is unaddressed\"\n      ]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Connected AZI2 to a non-canonical autophagy axis by showing FIP200 binds AZI2 and that FIP200 loss triggers AZI2-dependent TBK1/IFN activation with consequences for antitumor immunity.\",\n      \"evidence\": \"Co-immunoprecipitation of FIP200-AZI2, FIP200-ablation mouse models, and TBK1/IFN pathway readouts in breast cancer\",\n      \"pmids\": [\"32580962\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Single-lab interaction data without broader structural mapping\",\n        \"How FIP200 normally restrains AZI2-TBK1 activation is not mechanistically resolved\"\n      ]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Defined how AZI2 drives antiviral interferon output, showing it promotes TBK1-TANK association during influenza infection to support type I IFN production and host survival.\",\n      \"evidence\": \"AZI2 knockout mice in an influenza lung model, immunoprecipitation, immunofluorescence, and luciferase reporter assays\",\n      \"pmids\": [\"35595469\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Single-lab study; reciprocal validation of TBK1-TANK bridging is limited\",\n        \"Whether AZI2 directly stabilizes the TBK1-TANK complex versus indirectly is unclear\"\n      ]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Extended the autophagy-inflammation link by showing AZI2 accumulates at stalled cargo-receptor complexes to activate TBK1 and a DDX3X-IRF3 transcriptional program promoting CD8+ T cell infiltration.\",\n      \"evidence\": \"RB1CC1 depletion, AZI2 puncta imaging, AZI2-DDX3X-IRF3 co-IP, chemokine assays, pharmacological screen, and tumor T cell measurements\",\n      \"pmids\": [\"37733921\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Single-lab data; the trigger for AZI2 puncta accumulation is not fully defined\",\n        \"Direct versus indirect DDX3X engagement not biochemically separated\"\n      ]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Placed AZI2 in selective mitophagy, demonstrating it is recruited to damaged mitochondria and phosphorylated at S318 to support NDP52-driven but not OPTN-driven degradation.\",\n      \"evidence\": \"AZI2/TBKBP1 and OPTN knockout constructs, mitophagy assays, and S318 phosphosite mutagenesis with recruitment imaging\",\n      \"pmids\": [\"39276928\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Kinase responsible for S318 phosphorylation not identified\",\n        \"S318 mutation only slightly impairs degradation, leaving its functional weight uncertain\"\n      ]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Resolved how AZI2 and TANK cooperate at the TNF receptor complex, showing distinct recruitment routes (TANK via NEMO early, AZI2 via A20 later) that jointly suppress RIPK1-dependent cell death.\",\n      \"evidence\": \"Single and double knockout mice, TNFR1-deficiency and kinase-dead RIPK1 rescues, and interaction mapping of TANK-NEMO and AZI2-A20\",\n      \"pmids\": [\"39562788\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"Structural basis of the AZI2-A20 interaction not defined\",\n        \"How AZI2-delivered TBK1 mechanistically restrains RIPK1 not fully detailed\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"It remains unresolved how AZI2's distinct functions — TBK1 adaptor activity across TNFR, antiviral, and autophagy contexts versus Cdc37/Hsp90-mediated c-Src regulation — are integrated or differentially deployed across cell types.\",\n      \"evidence\": \"No single study in the corpus unifies these parallel mechanisms\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"No structural model of AZI2 domains assigning regions to TBK1 versus Cdc37 binding\",\n        \"Regulatory logic selecting between AZI2's pro-survival and pro-death/pro-inflammatory roles unknown\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [3, 4, 6]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [1]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [5]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [4]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [0, 3, 6]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [4, 5]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [6]}\n    ],\n    \"complexes\": [\"TNF receptor signaling complex\"],\n    \"partners\": [\"TBK1\", \"TANK\", \"A20\", \"Cdc37\", \"FIP200\", \"DDX3X\", \"NDP52\", \"IRF3\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":5,"faith_total":5,"faith_pct":100.0}}