{"gene":"ATG7","run_date":"2026-06-09T22:02:44","timeline":{"discoveries":[{"year":2004,"finding":"ATG7 and beclin 1 are required for autophagic cell death induced by activation of receptor-interacting protein and JNK kinases; this autophagic death pathway is induced by caspase-8 inhibition, placing ATG7 as an essential effector downstream of caspase-8 inhibition in a non-apoptotic death program.","method":"Genetic loss-of-function (ATG7/beclin 1 knockout/knockdown) with morphological and cell death phenotypic readout","journal":"Science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean genetic KO with defined cellular phenotype, single lab but multiple genetic tools","pmids":["15131264"],"is_preprint":false},{"year":2009,"finding":"ATG5 and ATG7 are dispensable for an alternative macroautophagy pathway in mouse cells; the ATG5/ATG7-independent alternative autophagy uses Rab9-dependent fusion of isolation membranes with trans-Golgi and late endosomal vesicles and does not involve LC3 lipidation, demonstrating that ATG7 is required only for the canonical LC3-lipidation-dependent autophagy pathway.","method":"Atg5/Atg7 knockout mouse cells, electron microscopy, LC3 lipidation assays, Rab9 dependency experiments","journal":"Nature","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal genetic knockouts with multiple orthogonal readouts (EM, LC3 lipidation, protein degradation), replicated across two gene knockouts","pmids":["19794493"],"is_preprint":false},{"year":2012,"finding":"ATG7, independent of its E1-like enzymatic activity, physically binds the tumor suppressor p53 and regulates transcription of the cell cycle inhibitor p21(CDKN1A) during nutrient starvation; Atg7-deficient MEFs fail to arrest the cell cycle under starvation, and prolonged Atg7 deficiency leads to increased DNA damage and p53-dependent apoptosis.","method":"Co-immunoprecipitation (Atg7-p53 interaction), E1-enzymatic-activity mutant rescue, Atg7 knockout mouse embryonic fibroblasts, p21 transcription assays, Chk2 deletion epistasis","journal":"Science","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — direct binding shown by Co-IP, enzymatic-activity mutant distinguishes autophagy-independent function, genetic epistasis with Chk2 deletion","pmids":["22499945"],"is_preprint":false},{"year":2013,"finding":"ATG7 (E1) recruits E2 enzymes ATG3 and ATG10 through noncanonical mechanisms distinct from canonical ubiquitin E1-E2 interactions; structural studies revealed the basis for these E2 recruitment modes in the context of the two ubiquitin-like conjugation systems (Atg8 and Atg12) essential for autophagosome biogenesis.","method":"Crystal structures of Atg7-Atg3 and Atg7-Atg10 complexes, structural and mechanistic analysis","journal":"Autophagy","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structures of two distinct E1-E2 complexes with functional mechanistic interpretation","pmids":["23388412"],"is_preprint":false},{"year":2013,"finding":"Caspase-9 forms a direct protein complex with ATG7; ATG7 represses the apoptotic activity of caspase-9 through direct interaction (not via autophagic function), while caspase-9 (in a catalytic-activity-independent manner) enhances ATG7-mediated LC3-II formation, revealing reciprocal cross-regulation between autophagy and apoptosis.","method":"Co-immunoprecipitation, caspase catalytic mutants, ATG7 knockdown, LC3-II formation assays","journal":"The Journal of Biological Chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP and functional mutants in single lab","pmids":["24362031"],"is_preprint":false},{"year":2013,"finding":"In Drosophila intestinal cells, ATG7 and ATG3 are dispensable for autophagy-mediated programmed reduction of cell size during midgut cell death, while UBA1 (the ubiquitin E1 enzyme) is required; this defines an ATG7/ATG3-independent autophagy program in which ubiquitin activation (not the ATG8 conjugation system) drives autophagy.","method":"Atg7 and Atg3 loss-of-function genetics in Drosophila intestine, epistasis with Uba1, electron microscopy","journal":"Nature Cell Biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean genetic loss-of-function epistasis in Drosophila with multiple ATG genes and defined phenotype replicated with EM","pmids":["23873149"],"is_preprint":false},{"year":2014,"finding":"BAT3 controls autophagy by modulating p300 intracellular localization: BAT3 limits p300-dependent acetylation of ATG7 (which inhibits autophagy when acetylated) while simultaneously promoting p300-dependent acetylation of p53 (which promotes autophagy via pro-autophagic target genes). Loss of BAT3 results in ATG7 hyperacetylation and abolished autophagy.","method":"BAT3 knockout mouse embryos and MEFs, p300 localization assays, acetylation immunoprecipitation, BAT3 cytosol-only mutant rescue","journal":"Proceedings of the National Academy of Sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with acetylation biochemistry and subcellular fractionation, single lab","pmids":["24591579"],"is_preprint":false},{"year":2017,"finding":"Crystal structure of Atg8 bound to the C-terminal domain of ATG7 revealed an unprecedented binding mode: Atg8 binds the C-terminal α-helix and crossover loop of ATG7 (not the central β-sheet or catalytic site as in previously reported structures), changing the autoinhibited crossover loop conformation; mutational analyses confirmed this multi-step recognition mechanism is important for the activation reaction.","method":"Crystal structure of Atg8–ATG7(C-terminal domain) complex, site-directed mutagenesis, activation assays","journal":"Journal of Molecular Biology","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structure plus mutagenesis validating functional importance of the observed binding mode","pmids":["29237558"],"is_preprint":false},{"year":2018,"finding":"ATG7 binds PKM2 and prevents its phosphorylation at Tyr-105 by FGFR1, thereby inhibiting the Warburg effect; Atg7 deficiency leads to hyperphosphorylation of PKM2, promoting the Warburg effect and epithelial-mesenchymal transition (EMT) independently of ATG7's autophagic function.","method":"Co-immunoprecipitation (ATG7-PKM2 interaction), phosphorylation assays, Atg7 overexpression/knockdown, EMT phenotypic assays","journal":"International Journal of Biological Sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct binding by Co-IP and phosphorylation biochemistry, single lab","pmids":["29910687"],"is_preprint":false},{"year":2018,"finding":"In Cnot3-deficient hearts, ATG7 is posttranscriptionally upregulated (Cnot3 binds and shortens the Atg7 mRNA poly(A) tail); upregulated ATG7 interacts with p53 and modulates p53 activity to induce expression of cell death-promoting genes in cardiomyocytes. Genetic ablation of Atg7 (but not Atg5) rescues cardiac function and increases survival of Cnot1/Cnot3 knockout mice.","method":"CCR4-NOT complex conditional KO mice, Atg7 genetic ablation epistasis, mRNA deadenylation assays, Atg7-p53 interaction, cardiac function assays","journal":"Science Signaling","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic epistasis (Atg7 KO rescues Cnot KO phenotype), Atg7-p53 Co-IP, mRNA binding assay, multiple orthogonal methods","pmids":["29438013"],"is_preprint":false},{"year":2018,"finding":"ATG7 C572S (serine substitution of the catalytic cysteine) forms stable intermediate complexes with LC3 and ATG12, thereby acting as a dominant-negative inhibitor that blocks both LC3-PE conjugation and ATG12-ATG5 conjugation and suppresses autophagosome formation; this confirms that Cys572 forms the catalytic thioester bond essential for ATG7 E1-like activity.","method":"ATG7 C572S mutant expression in TetOff cells, LC3/ATG12 conjugation assays, autophagosome formation assays","journal":"Biochemical and Biophysical Research Communications","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — active-site mutagenesis with functional conjugation assays, single lab","pmids":["30503495"],"is_preprint":false},{"year":2019,"finding":"TP53INP2 forms a trimeric complex LC3B-TP53INP2-ATG7 in the cytoplasm; TP53INP2 promotes LC3B-ATG7 interaction by directly interacting with both LC3B (via its LIR motif) and ATG7, and loss of either TP53INP2-LC3 or TP53INP2-ATG7 interaction significantly reduces LC3B-ATG7 binding and autophagosome formation.","method":"Co-immunoprecipitation, pulldown, LIR mutants, BECN1/ATG5 deletion epistasis, colocalization with early autophagic markers","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP and multiple mutants in single lab establishing trimeric complex","pmids":["30767704"],"is_preprint":false},{"year":2021,"finding":"In thioglycolate-elicited mouse peritoneal macrophages, ATG7 and ATG3 are dispensable for LC3-PE (LC3-II) conjugation, while ATG5 is required; this demonstrates that in this specific metabolic context, LC3 lipidation occurs through an ATG7/ATG3-independent mechanism, revealing a eukaryotic exception to the canonical yeast-based LC3 lipidation model.","method":"Atg7 and Atg5 conditional KO macrophages, ATG3 knockout, LC3-II immunoblot, bafilomycin A1 flux assays","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean genetic KO comparison of ATG5 vs ATG7 vs ATG3 with direct LC3 lipidation readout, single lab","pmids":["33459130"],"is_preprint":false},{"year":2021,"finding":"METTL3-mediated m6A modification of ATG7 mRNA decreases ATG7 RNA stability, reducing ATG7 protein expression; this impaired ATG7-dependent autophagy promotes GATA4 accumulation, leading to cellular senescence in fibroblast-like synoviocytes and OA progression.","method":"m6A methylated RNA immunoprecipitation, RNA immunoprecipitation, ATG7 mRNA stability assays, METTL3 siRNA knockdown, autophagic flux assays","journal":"Annals of the Rheumatic Diseases","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — MeRIP and RIP confirming direct m6A modification of ATG7 mRNA with functional readout, single lab","pmids":["34706873"],"is_preprint":false},{"year":2021,"finding":"Biallelic loss-of-function variants in human ATG7 cause a neurodevelopmental disorder with cerebellar and corpus callosum abnormalities; patient fibroblasts show severely diminished ATG7 protein with markedly reduced autophagic flux; reintroduction of patient-derived mutant ATG7 into model systems failed to rescue LC3 lipidation, confirming ATG7 is indispensable for canonical degradative autophagy in humans.","method":"Patient genetics, autophagic flux assays in patient fibroblasts and skeletal muscle, long-lived protein degradation assays, yeast and MEF complementation with mutant ATG7","journal":"The New England Journal of Medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple patient families, biochemical flux assays, cross-species complementation with mutant vs WT ATG7, multiple orthogonal methods","pmids":["34161705"],"is_preprint":false},{"year":2022,"finding":"TRIM7/RNF90 (a RING-type E3 ubiquitin ligase) promotes K63-linked ubiquitination of ATG7 at K413, which enhances autophagosome accumulation during starvation, rapamycin stimulation, and L. monocytogenes infection; TRIM7 deficiency reduces autophagy and increases bacterial infection.","method":"Co-immunoprecipitation (TRIM7-ATG7 interaction), ubiquitination assays with K413 site mutant, TRIM7 KO cells and mice, autophagosome quantification","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct Co-IP, site-specific ubiquitination mutant, and in vivo KO with defined phenotype, single lab","pmids":["36576150"],"is_preprint":false},{"year":2023,"finding":"Under oxidative stress, the ATM-CHK2-TRIM32 axis regulates ATG7 ubiquitination: ROS activate ATM (S1981 phosphorylation), which phosphorylates CHK2 (T68), which binds and phosphorylates TRIM32 (S55), which then mediates K63-linked ubiquitination of ATG7 at K45 to initiate autophagy; Chk2-/- mice show reduced TRIM32 phosphorylation, reduced ATG7 ubiquitination, and aggravated infarction after stroke.","method":"Phosphorylation assays, Co-IP of CHK2-TRIM32 and TRIM32-ATG7, K45 ubiquitination site-specific mutant, Chk2-/- mouse stroke model","journal":"Cell Reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ordered biochemical pathway with site-specific mutants and in vivo mouse model, single lab","pmids":["37943659"],"is_preprint":false},{"year":2023,"finding":"Thioredoxin 1 (Trx1) transnitrosylates ATG7 at Cys402 during myocardial ischemia: ischemia-oxidized Trx1 (Cys32-Cys35 disulfide, S-nitrosylated at Cys73) undergoes thiol-disulfide exchange with ATG7 Cys545-Cys548, releasing NO from Trx1 Cys73 and transferring it to ATG7 Cys402; S-nitrosylation of ATG7 at Cys402 stimulates its E1-like enzyme activity, promoting autophagy and cardiac protection during ischemia.","method":"Atg7 C402S knock-in mice, in vitro thiol-disulfide exchange and transnitrosylation assays, E1-like activity measurement, ischemia model","journal":"The Journal of Clinical Investigation","confidence":"High","confidence_rationale":"Tier 1 / Strong — site-specific knock-in mice, in vitro reconstitution of transnitrosylation mechanism, and functional E1 activity assay with in vivo cardiac phenotype","pmids":["36480290"],"is_preprint":false},{"year":2023,"finding":"Acetylation of ATG7 disrupts its interaction with the E2-like enzyme ATG3, inhibiting LC3 lipidation in vitro and in vivo; in response to various stimuli, ATG7 undergoes deacetylation to induce macroautophagy and LC3-associated microautophagy, which are necessary for eliminating cytoplasmic DNA and degrading lysosome membrane proteins, respectively.","method":"ATG7 acetylation site mutants, in vitro LC3 lipidation assay, ATG7-ATG3 co-immunoprecipitation, cell-based macroautophagy and LAP assays","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — in vitro LC3 lipidation assay plus Co-IP with functional mutants and cellular assays, single lab","pmids":["37999993"],"is_preprint":false},{"year":2023,"finding":"Endothelial ATG7 promotes angiogenesis through an autophagy-independent mechanism: in the cytoplasm, ATG7 associates with transcription factor ZNF148/ZBP-89, preventing its nuclear translocation; loss of ATG7 increases ZNF148-KPNB1 interaction promoting ZNF148 nuclear import, which upregulates STAT1, which then binds the HIF1A promoter and suppresses HIF1A expression, impairing ischemia-induced angiogenesis.","method":"EC-specific Atg7 KO mice, ChIP (STAT1 on HIF1A promoter), Co-IP (ATG7-ZNF148, ZNF148-KPNB1), HIF1A overexpression rescue, STAT1 inhibitor rescue, femoral artery ligation model","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple Co-IPs and ChIP with in vivo KO model and pharmacological rescue, single lab","pmids":["36300763"],"is_preprint":false},{"year":2023,"finding":"ATG7 suppresses IRF3-mediated interferon production in an autophagy-independent manner during influenza A virus infection by controlling expression of lncRNA GAPLINC; loss of ATG7 enhances type I and III interferon production, and the suppressive effect of ATG7 on IFN response is mediated through GAPLINC.","method":"ATG7 conditional KO mice, ATG7 overexpression/depletion in cells, transcriptome analysis, autophagy inhibitor controls, GAPLINC expression manipulation, IRF3 activation assays","journal":"PLoS Pathogens","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo KO mice, autophagy-independent function confirmed by inhibitor controls, and lncRNA mechanistic link, single lab","pmids":["38227600"],"is_preprint":false},{"year":2023,"finding":"Endothelial ATG7 is required for fibronectin production in the blood-brain barrier basement membrane via regulation of PKA activity and phosphorylation of CREB; Atg7 endothelial-specific KO reduces fibronectin expression, causing astrocytic endfeet detachment from microvessels and BBB leakage.","method":"Atg7 endothelial-specific KO mice, fibronectin immunostaining and quantification, PKA activity assays, CREB phosphorylation, astrocyte endfeet imaging, BBB permeability assays","journal":"The Journal of Cell Biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean conditional KO with defined molecular mechanism (PKA-CREB-fibronectin) and structural phenotype, single lab","pmids":["36995368"],"is_preprint":false},{"year":2022,"finding":"ATG7 hemizygosity in a PDAC model (KrasG12D/+; Trp53R172H/+) enhances tumor initiation and progression without ablating autophagy, but fewer hemizygous mice develop metastases; ATG7 promotes tumor cell invasion through succinate metabolism (Atg7+/- tumors have lower succinate), and ectopic ATG7 expression in Atg7+/- cells restores invasion without affecting autophagic capacity, demonstrating an autophagy-independent role of ATG7 in invasion and metastasis.","method":"Atg7 hemizygous PDAC mouse model, invasion assays, metabolomics (succinate), ATG7 ectopic expression rescue, autophagy capacity assays","journal":"Proceedings of the National Academy of Sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo genetic model with metabolomics and rescue experiments distinguishing autophagy-independent function, single lab","pmids":["35867735"],"is_preprint":false},{"year":2018,"finding":"ATG7 mediates renal tubular cell apoptosis during vancomycin nephrotoxicity by binding to and activating PKC-δ; Atg7 conditional KO (proximal tubule-specific) ameliorates vancomycin-induced kidney injury and apoptosis, and this renoprotective effect is lost after injection of myc-tagged PKCδ.","method":"Proximal tubule-specific Atg7 KO mice, co-immunoprecipitation (Atg7-PKCδ), PKCδ inhibitor rescue, global gene expression analysis","journal":"FASEB Journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct Co-IP and in vivo KO rescue experiment with PKCδ, single lab","pmids":["30589566"],"is_preprint":false},{"year":2023,"finding":"ISG15 binds to ATG7 protein, reducing its degradation and thereby enhancing ATG7-dependent autophagy in pancreatic cancer cells, promoting cancer progression and gemcitabine resistance.","method":"Co-immunoprecipitation (ISG15-ATG7), ATG7 protein stability assays, autophagy flux assays, in vitro and in vivo gemcitabine resistance models","journal":"International Journal of Biological Sciences","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single Co-IP with indirect functional readout, single lab","pmids":["38385083"],"is_preprint":false},{"year":2016,"finding":"In brain microvascular endothelial cells, ATG7 knockdown reduces IL-6 expression through NF-κB-dependent transcriptional control; endothelial-specific Atg7 KO mice show decreased brain microvessel density, and exogenous IL-6 restores impaired angiogenesis caused by ATG7 knockdown, demonstrating that ATG7 promotes brain angiogenesis via NF-κB-dependent IL-6 production.","method":"Atg7 endothelial-specific KO mice, ATG7 knockdown in brain endothelial cells, IL-6 measurement, NF-κB reporter assay, IL-6 rescue experiment, microvessel density quantification","journal":"International Journal of Molecular Sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo KO plus mechanistic IL-6/NF-κB pathway dissection with rescue, single lab","pmids":["28467355"],"is_preprint":false},{"year":2019,"finding":"ATG7 promotes bladder cancer invasion through an autophagy-mediated mechanism: ATG7-dependent autophagy causes degradation of HNRNPD protein, reducing HNRNPD interaction with ARHGDIB mRNA, which increases ARHGDIB mRNA stability and promotes invasion.","method":"ATG7 knockdown in human bladder cancer cells, HNRNPD-ARHGDIB mRNA interaction assays, ATG7-mediated HNRNPD protein degradation assays, invasion assays","journal":"Advanced Science","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, indirect mechanistic chain from ATG7 to mRNA stability via protein degradation","pmids":["31016112"],"is_preprint":false},{"year":2021,"finding":"ATG7-mediated autophagy promotes degradation of NANOG in embryonic stem cells via SQSTM1/p62 acting as an autophagy receptor for K63-ubiquitinated NANOG; loss of ATG7 increases nuclear NANOG, prevents exit from naive pluripotency, and disrupts peri-implantation development.","method":"ATG7-depleted ESCs, SQSTM1/p62 nuclear localization and Co-IP with K63-ubiquitinated NANOG, RNA-seq, ATAC-seq, in vivo Atg7 depletion embryo analysis","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct Co-IP of SQSTM1 with ubiquitinated NANOG, ATG7 KO phenotype with multi-omic validation, single lab","pmids":["35311460"],"is_preprint":false}],"current_model":"ATG7 is an E1-like ubiquitin-activating enzyme that sits at the hub of two autophagy-essential ubiquitin-like conjugation systems—activating LC3/Atg8 (for LC3-PE lipidation) and ATG12 (for ATG12-ATG5 conjugation)—through a catalytic Cys572 thioester mechanism; its activity is regulated by acetylation (inhibitory, disrupts ATG3 binding), K63-linked ubiquitination at K413 (by TRIM7, stimulatory) and K45 (by TRIM32 downstream of ATM-CHK2, stimulatory), and S-nitrosylation at Cys402 by Trx1 (stimulatory); independently of autophagy, ATG7 binds p53 to regulate p21 transcription and cell cycle arrest, binds PKM2 to suppress Tyr105 phosphorylation and the Warburg effect, binds caspase-9 to restrain its apoptotic activity, associates with ZNF148 in endothelial cells to control STAT1/HIF1A expression and angiogenesis, and promotes tumor invasion through succinate metabolism, making ATG7 a multifunctional effector with both canonical autophagy and autophagy-independent roles in cell cycle control, apoptosis, metabolism, and angiogenesis."},"narrative":{"mechanistic_narrative":"ATG7 is an E1-like enzyme that drives canonical, LC3-lipidation-dependent macroautophagy by initiating two ubiquitin-like conjugation cascades, and it additionally functions as a multifunctional effector with autophagy-independent roles in cell cycle control, apoptosis, metabolism, and angiogenesis [PMID:23388412, PMID:22499945]. Its catalytic Cys572 forms the thioester intermediate required to activate and transfer both LC3/Atg8 and ATG12, and a Cys572Ser substitution acts as a dominant-negative that traps stable LC3 and ATG12 intermediates and blocks autophagosome formation [PMID:30503495]. ATG7 recruits the E2 enzymes ATG3 and ATG10 through noncanonical interfaces distinct from classical ubiquitin E1-E2 contacts, and structural work shows Atg8 engages the C-terminal α-helix and crossover loop to relieve autoinhibition during activation [PMID:23388412, PMID:29237558]. This catalytic step distinguishes ATG7-dependent autophagy from alternative pathways: ATG5/ATG7-independent macroautophagy proceeds via Rab9-dependent membrane fusion without LC3 lipidation, and additional ATG7/ATG3-independent LC3 lipidation and autophagy programs operate in Drosophila midgut and elicited macrophages [PMID:19794493, PMID:23873149, PMID:33459130]. ATG7 activity is gated by post-translational modification: acetylation is inhibitory and disrupts ATG3 binding, while K63-linked ubiquitination at K413 by TRIM7 and at K45 via the ATM-CHK2-TRIM32 axis, and S-nitrosylation at Cys402 by transnitrosylating Trx1, all stimulate its E1-like activity and autophagy [PMID:37999993, PMID:36576150, PMID:37943659, PMID:36480290]. Independent of its enzymatic function, ATG7 binds p53 to control p21/CDKN1A transcription and starvation-induced cell cycle arrest, restrains caspase-9 apoptotic activity, binds PKM2 to suppress its Tyr105 phosphorylation and the Warburg effect, and in endothelial cells sequesters ZNF148 in the cytoplasm to regulate STAT1/HIF1A-dependent angiogenesis [PMID:22499945, PMID:24362031, PMID:29910687, PMID:36300763]. Biallelic loss-of-function variants in human ATG7 cause a neurodevelopmental disorder with cerebellar and corpus callosum abnormalities, with patient cells showing diminished ATG7 protein and severely reduced autophagic flux [PMID:34161705].","teleology":[{"year":2004,"claim":"Established ATG7 as a genetically essential effector of a non-apoptotic, autophagic cell death program, framing autophagy machinery as a determinant of cell fate beyond bulk degradation.","evidence":"Genetic loss-of-function of ATG7/beclin 1 with cell death readout downstream of caspase-8 inhibition","pmids":["15131264"],"confidence":"Medium","gaps":["Did not define ATG7's enzymatic contribution to this death program","No molecular mechanism linking ATG7 to RIP/JNK signaling"]},{"year":2009,"claim":"Defined the boundary of ATG7 requirement by showing it is needed only for canonical LC3-lipidation autophagy, not for Rab9-dependent alternative macroautophagy.","evidence":"Reciprocal Atg5/Atg7 knockout mouse cells with EM and LC3 lipidation assays","pmids":["19794493"],"confidence":"High","gaps":["Did not establish what triggers the alternative pathway in lieu of ATG7","Mechanism of Rab9-dependent membrane fusion unresolved"]},{"year":2012,"claim":"Revealed the first autophagy-independent function of ATG7: enzyme-activity-independent binding to p53 to control p21 transcription and starvation-induced cell cycle arrest.","evidence":"Co-IP, E1-mutant rescue, and Atg7-KO MEFs with Chk2-deletion epistasis","pmids":["22499945"],"confidence":"High","gaps":["Structural basis of ATG7-p53 binding unknown","How ATG7 influences p53 target selectivity unresolved"]},{"year":2013,"claim":"Provided the structural mechanism for how ATG7 recruits its E2 partners ATG3 and ATG10 through noncanonical interfaces, explaining substrate-specific routing in the two conjugation systems.","evidence":"Crystal structures of Atg7-Atg3 and Atg7-Atg10 complexes with mechanistic analysis","pmids":["23388412"],"confidence":"High","gaps":["Did not resolve the full activation transfer cycle in vivo","Regulation of E2 selection under different stimuli unaddressed"]},{"year":2013,"claim":"Extended ATG7's noncatalytic interaction network to apoptosis by demonstrating reciprocal cross-regulation with caspase-9.","evidence":"Reciprocal Co-IP with caspase catalytic mutants and LC3-II assays","pmids":["24362031"],"confidence":"Medium","gaps":["Reciprocal Co-IP from a single lab without structural validation","Physiological context where this cross-talk dominates is undefined"]},{"year":2013,"claim":"Demonstrated in Drosophila that an autophagy program can run without ATG7/ATG3, instead requiring ubiquitin E1 (UBA1), reinforcing that ATG7 is specific to the ATG8 conjugation route.","evidence":"Atg7/Atg3 loss-of-function genetics in Drosophila midgut with Uba1 epistasis and EM","pmids":["23873149"],"confidence":"High","gaps":["Conservation of this UBA1-driven program in mammals untested here","Membrane source for the ATG7-independent autophagy unknown"]},{"year":2014,"claim":"Identified acetylation as an inhibitory switch on ATG7 controlled by BAT3-modulated p300 localization, linking ATG7 activity to acetyltransferase compartmentalization.","evidence":"BAT3-KO MEFs, p300 localization, acetylation IP, cytosol-only BAT3 rescue","pmids":["24591579"],"confidence":"Medium","gaps":["Specific acetylated residues not pinpointed here","Deacetylase responsible for reversal not identified"]},{"year":2017,"claim":"Resolved the Atg8-ATG7 recognition mode, showing Atg8 binds the C-terminal helix/crossover loop to relieve autoinhibition, refining the activation mechanism.","evidence":"Crystal structure of Atg8-ATG7 C-terminal domain with mutagenesis and activation assays","pmids":["29237558"],"confidence":"High","gaps":["Did not capture the full thioester transfer step","Conformational dynamics during catalysis not measured"]},{"year":2018,"claim":"Connected ATG7 to cancer metabolism by showing it binds PKM2 and blocks its Tyr105 phosphorylation, suppressing the Warburg effect and EMT independently of autophagy.","evidence":"Co-IP, phosphorylation assays, Atg7 overexpression/knockdown, EMT assays","pmids":["29910687"],"confidence":"Medium","gaps":["Structural basis of ATG7-PKM2 binding unknown","How ATG7 shields the FGFR1 target site mechanistically unresolved"]},{"year":2018,"claim":"Confirmed Cys572 as the catalytic thioester residue by showing C572S traps LC3 and ATG12 intermediates and acts as a dominant-negative.","evidence":"ATG7 C572S expression with LC3/ATG12 conjugation and autophagosome assays","pmids":["30503495"],"confidence":"Medium","gaps":["Single-lab biochemistry without structural snapshot of the trapped intermediate"]},{"year":2018,"claim":"Linked posttranscriptional control of ATG7 (via CCR4-NOT deadenylation) to its p53-dependent cardiomyocyte death function, demonstrating in vivo that the ATG7-p53 axis drives pathology.","evidence":"Cnot conditional KO mice with Atg7 genetic ablation epistasis, deadenylation assays, Atg7-p53 Co-IP","pmids":["29438013"],"confidence":"High","gaps":["Whether p53 modulation requires ATG7 catalytic activity not fully separated","Generality beyond cardiomyocytes untested"]},{"year":2018,"claim":"Extended ATG7's noncatalytic protein-binding repertoire to PKC-delta activation in renal tubular apoptosis during nephrotoxicity.","evidence":"Proximal-tubule Atg7 KO mice, Atg7-PKCδ Co-IP, PKCδ rescue","pmids":["30589566"],"confidence":"Medium","gaps":["Single-lab Co-IP; direct binding interface undefined","Whether autophagy contributes in parallel not excluded"]},{"year":2019,"claim":"Showed that ATG7 engagement with LC3 is scaffolded by TP53INP2 in a trimeric LC3B-TP53INP2-ATG7 complex that promotes autophagosome formation.","evidence":"Reciprocal Co-IP, pulldown, LIR mutants, colocalization with autophagic markers","pmids":["30767704"],"confidence":"Medium","gaps":["Structural arrangement of the trimer unknown","Whether TP53INP2 affects catalytic transfer or only proximity unresolved"]},{"year":2019,"claim":"Implicated ATG7-dependent autophagy in bladder cancer invasion via HNRNPD degradation and ARHGDIB mRNA stabilization.","evidence":"ATG7 knockdown, HNRNPD-ARHGDIB interaction and degradation assays, invasion assays","pmids":["31016112"],"confidence":"Low","gaps":["Indirect multi-step mechanistic chain from single lab","Direct role of ATG7 enzymatic activity not isolated"]},{"year":2021,"claim":"Showed that ATG7 protein levels are tuned by m6A modification of its mRNA, linking RNA methylation to autophagy-dependent control of senescence in osteoarthritis.","evidence":"MeRIP, RIP, mRNA stability assays, METTL3 knockdown, flux assays","pmids":["34706873"],"confidence":"Medium","gaps":["m6A reader mediating decay not defined here","Generality beyond synoviocytes untested"]},{"year":2021,"claim":"Demonstrated a mammalian exception in macrophages where LC3-PE conjugation occurs without ATG7/ATG3 but requires ATG5, challenging the universality of the canonical lipidation model.","evidence":"Atg7/Atg5 conditional KO and ATG3-KO macrophages with LC3-II immunoblot and flux assays","pmids":["33459130"],"confidence":"Medium","gaps":["Alternative E1/E2 enzymes substituting for ATG7/ATG3 unidentified","Mechanism restricting this to the metabolic context unknown"]},{"year":2021,"claim":"Established ATG7 as indispensable for human degradative autophagy and as a Mendelian disease gene by linking biallelic loss-of-function to a neurodevelopmental disorder.","evidence":"Patient genetics, flux assays in patient fibroblasts/muscle, cross-species complementation with mutant ATG7","pmids":["34161705"],"confidence":"High","gaps":["Cellular basis of cerebellar/corpus callosum pathology not fully defined","Contribution of noncatalytic ATG7 functions to the phenotype unresolved"]},{"year":2022,"claim":"Distinguished an autophagy-independent ATG7 role in tumor invasion mediated by succinate metabolism in a PDAC dosage model.","evidence":"Atg7 hemizygous PDAC mice, invasion assays, succinate metabolomics, ectopic ATG7 rescue without autophagy change","pmids":["35867735"],"confidence":"Medium","gaps":["Molecular link between ATG7 and succinate accumulation undefined","Direct enzymatic partner in this metabolic role unknown"]},{"year":2022,"claim":"Identified K63-linked ubiquitination at K413 by TRIM7 as a stimulatory modification enhancing autophagy and antibacterial defense.","evidence":"Co-IP, K413 site-mutant ubiquitination assays, TRIM7-KO cells and mice","pmids":["36576150"],"confidence":"Medium","gaps":["How K413 ubiquitination mechanistically activates E1 function unclear","Deubiquitinase reversing this mark unidentified"]},{"year":2022,"claim":"Linked ATG7-dependent autophagy to NANOG turnover via SQSTM1/p62 recognition of K63-ubiquitinated NANOG, controlling exit from naive pluripotency.","evidence":"ATG7-depleted ESCs, SQSTM1 Co-IP with ubiquitinated NANOG, RNA-seq/ATAC-seq, in vivo embryo analysis","pmids":["35311460"],"confidence":"Medium","gaps":["Ubiquitin ligase tagging NANOG not identified","Nuclear-cytoplasmic routing of the degradation step unresolved"]},{"year":2023,"claim":"Mapped the ATM-CHK2-TRIM32 oxidative-stress axis to K45 K63-ubiquitination of ATG7, defining a damage-responsive activating cascade.","evidence":"Ordered phosphorylation/Co-IP assays, K45 site mutant, Chk2-/- stroke mouse model","pmids":["37943659"],"confidence":"Medium","gaps":["Structural effect of K45 modification on E1 activity unknown","Interplay with K413 ubiquitination not addressed"]},{"year":2023,"claim":"Defined a redox activating mechanism whereby Trx1 transnitrosylates ATG7 at Cys402 to stimulate E1 activity and cardiac protection during ischemia.","evidence":"Atg7 C402S knock-in mice, in vitro transnitrosylation reconstitution, E1 activity and ischemia model","pmids":["36480290"],"confidence":"High","gaps":["How Cys402 nitrosylation structurally enhances catalysis unresolved","Crosstalk with acetylation/ubiquitination switches untested"]},{"year":2023,"claim":"Confirmed acetylation as a direct inhibitory switch by showing it disrupts ATG3 binding and blocks LC3 lipidation, with deacetylation enabling macro- and microautophagy.","evidence":"Acetyl-site mutants, in vitro lipidation, ATG7-ATG3 Co-IP, cellular LAP/macroautophagy assays","pmids":["37999993"],"confidence":"Medium","gaps":["Deacetylase identity not established here","Quantitative stoichiometry of acetylation in vivo unknown"]},{"year":2023,"claim":"Defined a noncatalytic endothelial function: cytoplasmic ATG7 sequesters ZNF148 to suppress STAT1-mediated repression of HIF1A and promote ischemic angiogenesis.","evidence":"EC-specific Atg7 KO mice, ChIP, Co-IP (ATG7-ZNF148, ZNF148-KPNB1), HIF1A and STAT1-inhibitor rescue","pmids":["36300763"],"confidence":"Medium","gaps":["Direct ATG7-ZNF148 binding interface undefined","Relationship to other endothelial ATG7 functions unresolved"]},{"year":2023,"claim":"Extended endothelial ATG7 roles to blood-brain barrier integrity through PKA-CREB-dependent fibronectin production.","evidence":"EC-specific Atg7 KO mice, fibronectin/PKA/CREB assays, astrocyte endfeet imaging, BBB permeability","pmids":["36995368"],"confidence":"Medium","gaps":["Whether this is autophagy-dependent not fully separated","Direct molecular target of ATG7 upstream of PKA unknown"]},{"year":2023,"claim":"Identified an autophagy-independent immunosuppressive role: ATG7 limits IRF3-driven interferon production via control of lncRNA GAPLINC during influenza infection.","evidence":"ATG7 conditional KO mice, transcriptome analysis, autophagy-inhibitor controls, GAPLINC manipulation","pmids":["38227600"],"confidence":"Medium","gaps":["How ATG7 controls GAPLINC expression mechanistically undefined","Direct ATG7 binding partner in this pathway unidentified"]},{"year":2023,"claim":"Proposed ISG15 binding stabilizes ATG7 to enhance autophagy and chemoresistance in pancreatic cancer.","evidence":"Co-IP, ATG7 stability assays, gemcitabine resistance models","pmids":["38385083"],"confidence":"Low","gaps":["Single Co-IP with indirect functional readout","Whether ISG15 covalently modifies or non-covalently binds ATG7 unresolved"]},{"year":null,"claim":"How ATG7's catalytic E1 activity, its layered post-translational switches (acetylation, K45/K413 ubiquitination, Cys402 nitrosylation), and its diverse noncatalytic protein-binding partners are integrated and prioritized in a given physiological context remains unresolved.","evidence":"No single study reconciles the competing regulatory inputs and moonlighting interactions","pmids":[],"confidence":"Low","gaps":["No unified structural model of how modifications converge on E1 activity","Hierarchy among autophagy-dependent vs 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MCP","url":"https://pubmed.ncbi.nlm.nih.gov/32299840","citation_count":15,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":54825,"output_tokens":7573,"usd":0.139035,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":16777,"output_tokens":7585,"usd":0.136755,"stage2_stop_reason":"end_turn"},"total_usd":0.27579,"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\": 2004,\n      \"finding\": \"ATG7 and beclin 1 are required for autophagic cell death induced by activation of receptor-interacting protein and JNK kinases; this autophagic death pathway is induced by caspase-8 inhibition, placing ATG7 as an essential effector downstream of caspase-8 inhibition in a non-apoptotic death program.\",\n      \"method\": \"Genetic loss-of-function (ATG7/beclin 1 knockout/knockdown) with morphological and cell death phenotypic readout\",\n      \"journal\": \"Science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean genetic KO with defined cellular phenotype, single lab but multiple genetic tools\",\n      \"pmids\": [\"15131264\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"ATG5 and ATG7 are dispensable for an alternative macroautophagy pathway in mouse cells; the ATG5/ATG7-independent alternative autophagy uses Rab9-dependent fusion of isolation membranes with trans-Golgi and late endosomal vesicles and does not involve LC3 lipidation, demonstrating that ATG7 is required only for the canonical LC3-lipidation-dependent autophagy pathway.\",\n      \"method\": \"Atg5/Atg7 knockout mouse cells, electron microscopy, LC3 lipidation assays, Rab9 dependency experiments\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal genetic knockouts with multiple orthogonal readouts (EM, LC3 lipidation, protein degradation), replicated across two gene knockouts\",\n      \"pmids\": [\"19794493\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"ATG7, independent of its E1-like enzymatic activity, physically binds the tumor suppressor p53 and regulates transcription of the cell cycle inhibitor p21(CDKN1A) during nutrient starvation; Atg7-deficient MEFs fail to arrest the cell cycle under starvation, and prolonged Atg7 deficiency leads to increased DNA damage and p53-dependent apoptosis.\",\n      \"method\": \"Co-immunoprecipitation (Atg7-p53 interaction), E1-enzymatic-activity mutant rescue, Atg7 knockout mouse embryonic fibroblasts, p21 transcription assays, Chk2 deletion epistasis\",\n      \"journal\": \"Science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — direct binding shown by Co-IP, enzymatic-activity mutant distinguishes autophagy-independent function, genetic epistasis with Chk2 deletion\",\n      \"pmids\": [\"22499945\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"ATG7 (E1) recruits E2 enzymes ATG3 and ATG10 through noncanonical mechanisms distinct from canonical ubiquitin E1-E2 interactions; structural studies revealed the basis for these E2 recruitment modes in the context of the two ubiquitin-like conjugation systems (Atg8 and Atg12) essential for autophagosome biogenesis.\",\n      \"method\": \"Crystal structures of Atg7-Atg3 and Atg7-Atg10 complexes, structural and mechanistic analysis\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structures of two distinct E1-E2 complexes with functional mechanistic interpretation\",\n      \"pmids\": [\"23388412\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Caspase-9 forms a direct protein complex with ATG7; ATG7 represses the apoptotic activity of caspase-9 through direct interaction (not via autophagic function), while caspase-9 (in a catalytic-activity-independent manner) enhances ATG7-mediated LC3-II formation, revealing reciprocal cross-regulation between autophagy and apoptosis.\",\n      \"method\": \"Co-immunoprecipitation, caspase catalytic mutants, ATG7 knockdown, LC3-II formation assays\",\n      \"journal\": \"The Journal of Biological Chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP and functional mutants in single lab\",\n      \"pmids\": [\"24362031\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"In Drosophila intestinal cells, ATG7 and ATG3 are dispensable for autophagy-mediated programmed reduction of cell size during midgut cell death, while UBA1 (the ubiquitin E1 enzyme) is required; this defines an ATG7/ATG3-independent autophagy program in which ubiquitin activation (not the ATG8 conjugation system) drives autophagy.\",\n      \"method\": \"Atg7 and Atg3 loss-of-function genetics in Drosophila intestine, epistasis with Uba1, electron microscopy\",\n      \"journal\": \"Nature Cell Biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean genetic loss-of-function epistasis in Drosophila with multiple ATG genes and defined phenotype replicated with EM\",\n      \"pmids\": [\"23873149\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"BAT3 controls autophagy by modulating p300 intracellular localization: BAT3 limits p300-dependent acetylation of ATG7 (which inhibits autophagy when acetylated) while simultaneously promoting p300-dependent acetylation of p53 (which promotes autophagy via pro-autophagic target genes). Loss of BAT3 results in ATG7 hyperacetylation and abolished autophagy.\",\n      \"method\": \"BAT3 knockout mouse embryos and MEFs, p300 localization assays, acetylation immunoprecipitation, BAT3 cytosol-only mutant rescue\",\n      \"journal\": \"Proceedings of the National Academy of Sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with acetylation biochemistry and subcellular fractionation, single lab\",\n      \"pmids\": [\"24591579\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Crystal structure of Atg8 bound to the C-terminal domain of ATG7 revealed an unprecedented binding mode: Atg8 binds the C-terminal α-helix and crossover loop of ATG7 (not the central β-sheet or catalytic site as in previously reported structures), changing the autoinhibited crossover loop conformation; mutational analyses confirmed this multi-step recognition mechanism is important for the activation reaction.\",\n      \"method\": \"Crystal structure of Atg8–ATG7(C-terminal domain) complex, site-directed mutagenesis, activation assays\",\n      \"journal\": \"Journal of Molecular Biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structure plus mutagenesis validating functional importance of the observed binding mode\",\n      \"pmids\": [\"29237558\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"ATG7 binds PKM2 and prevents its phosphorylation at Tyr-105 by FGFR1, thereby inhibiting the Warburg effect; Atg7 deficiency leads to hyperphosphorylation of PKM2, promoting the Warburg effect and epithelial-mesenchymal transition (EMT) independently of ATG7's autophagic function.\",\n      \"method\": \"Co-immunoprecipitation (ATG7-PKM2 interaction), phosphorylation assays, Atg7 overexpression/knockdown, EMT phenotypic assays\",\n      \"journal\": \"International Journal of Biological Sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct binding by Co-IP and phosphorylation biochemistry, single lab\",\n      \"pmids\": [\"29910687\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"In Cnot3-deficient hearts, ATG7 is posttranscriptionally upregulated (Cnot3 binds and shortens the Atg7 mRNA poly(A) tail); upregulated ATG7 interacts with p53 and modulates p53 activity to induce expression of cell death-promoting genes in cardiomyocytes. Genetic ablation of Atg7 (but not Atg5) rescues cardiac function and increases survival of Cnot1/Cnot3 knockout mice.\",\n      \"method\": \"CCR4-NOT complex conditional KO mice, Atg7 genetic ablation epistasis, mRNA deadenylation assays, Atg7-p53 interaction, cardiac function assays\",\n      \"journal\": \"Science Signaling\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic epistasis (Atg7 KO rescues Cnot KO phenotype), Atg7-p53 Co-IP, mRNA binding assay, multiple orthogonal methods\",\n      \"pmids\": [\"29438013\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"ATG7 C572S (serine substitution of the catalytic cysteine) forms stable intermediate complexes with LC3 and ATG12, thereby acting as a dominant-negative inhibitor that blocks both LC3-PE conjugation and ATG12-ATG5 conjugation and suppresses autophagosome formation; this confirms that Cys572 forms the catalytic thioester bond essential for ATG7 E1-like activity.\",\n      \"method\": \"ATG7 C572S mutant expression in TetOff cells, LC3/ATG12 conjugation assays, autophagosome formation assays\",\n      \"journal\": \"Biochemical and Biophysical Research Communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — active-site mutagenesis with functional conjugation assays, single lab\",\n      \"pmids\": [\"30503495\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"TP53INP2 forms a trimeric complex LC3B-TP53INP2-ATG7 in the cytoplasm; TP53INP2 promotes LC3B-ATG7 interaction by directly interacting with both LC3B (via its LIR motif) and ATG7, and loss of either TP53INP2-LC3 or TP53INP2-ATG7 interaction significantly reduces LC3B-ATG7 binding and autophagosome formation.\",\n      \"method\": \"Co-immunoprecipitation, pulldown, LIR mutants, BECN1/ATG5 deletion epistasis, colocalization with early autophagic markers\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP and multiple mutants in single lab establishing trimeric complex\",\n      \"pmids\": [\"30767704\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In thioglycolate-elicited mouse peritoneal macrophages, ATG7 and ATG3 are dispensable for LC3-PE (LC3-II) conjugation, while ATG5 is required; this demonstrates that in this specific metabolic context, LC3 lipidation occurs through an ATG7/ATG3-independent mechanism, revealing a eukaryotic exception to the canonical yeast-based LC3 lipidation model.\",\n      \"method\": \"Atg7 and Atg5 conditional KO macrophages, ATG3 knockout, LC3-II immunoblot, bafilomycin A1 flux assays\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean genetic KO comparison of ATG5 vs ATG7 vs ATG3 with direct LC3 lipidation readout, single lab\",\n      \"pmids\": [\"33459130\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"METTL3-mediated m6A modification of ATG7 mRNA decreases ATG7 RNA stability, reducing ATG7 protein expression; this impaired ATG7-dependent autophagy promotes GATA4 accumulation, leading to cellular senescence in fibroblast-like synoviocytes and OA progression.\",\n      \"method\": \"m6A methylated RNA immunoprecipitation, RNA immunoprecipitation, ATG7 mRNA stability assays, METTL3 siRNA knockdown, autophagic flux assays\",\n      \"journal\": \"Annals of the Rheumatic Diseases\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — MeRIP and RIP confirming direct m6A modification of ATG7 mRNA with functional readout, single lab\",\n      \"pmids\": [\"34706873\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Biallelic loss-of-function variants in human ATG7 cause a neurodevelopmental disorder with cerebellar and corpus callosum abnormalities; patient fibroblasts show severely diminished ATG7 protein with markedly reduced autophagic flux; reintroduction of patient-derived mutant ATG7 into model systems failed to rescue LC3 lipidation, confirming ATG7 is indispensable for canonical degradative autophagy in humans.\",\n      \"method\": \"Patient genetics, autophagic flux assays in patient fibroblasts and skeletal muscle, long-lived protein degradation assays, yeast and MEF complementation with mutant ATG7\",\n      \"journal\": \"The New England Journal of Medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple patient families, biochemical flux assays, cross-species complementation with mutant vs WT ATG7, multiple orthogonal methods\",\n      \"pmids\": [\"34161705\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"TRIM7/RNF90 (a RING-type E3 ubiquitin ligase) promotes K63-linked ubiquitination of ATG7 at K413, which enhances autophagosome accumulation during starvation, rapamycin stimulation, and L. monocytogenes infection; TRIM7 deficiency reduces autophagy and increases bacterial infection.\",\n      \"method\": \"Co-immunoprecipitation (TRIM7-ATG7 interaction), ubiquitination assays with K413 site mutant, TRIM7 KO cells and mice, autophagosome quantification\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct Co-IP, site-specific ubiquitination mutant, and in vivo KO with defined phenotype, single lab\",\n      \"pmids\": [\"36576150\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Under oxidative stress, the ATM-CHK2-TRIM32 axis regulates ATG7 ubiquitination: ROS activate ATM (S1981 phosphorylation), which phosphorylates CHK2 (T68), which binds and phosphorylates TRIM32 (S55), which then mediates K63-linked ubiquitination of ATG7 at K45 to initiate autophagy; Chk2-/- mice show reduced TRIM32 phosphorylation, reduced ATG7 ubiquitination, and aggravated infarction after stroke.\",\n      \"method\": \"Phosphorylation assays, Co-IP of CHK2-TRIM32 and TRIM32-ATG7, K45 ubiquitination site-specific mutant, Chk2-/- mouse stroke model\",\n      \"journal\": \"Cell Reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ordered biochemical pathway with site-specific mutants and in vivo mouse model, single lab\",\n      \"pmids\": [\"37943659\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Thioredoxin 1 (Trx1) transnitrosylates ATG7 at Cys402 during myocardial ischemia: ischemia-oxidized Trx1 (Cys32-Cys35 disulfide, S-nitrosylated at Cys73) undergoes thiol-disulfide exchange with ATG7 Cys545-Cys548, releasing NO from Trx1 Cys73 and transferring it to ATG7 Cys402; S-nitrosylation of ATG7 at Cys402 stimulates its E1-like enzyme activity, promoting autophagy and cardiac protection during ischemia.\",\n      \"method\": \"Atg7 C402S knock-in mice, in vitro thiol-disulfide exchange and transnitrosylation assays, E1-like activity measurement, ischemia model\",\n      \"journal\": \"The Journal of Clinical Investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — site-specific knock-in mice, in vitro reconstitution of transnitrosylation mechanism, and functional E1 activity assay with in vivo cardiac phenotype\",\n      \"pmids\": [\"36480290\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Acetylation of ATG7 disrupts its interaction with the E2-like enzyme ATG3, inhibiting LC3 lipidation in vitro and in vivo; in response to various stimuli, ATG7 undergoes deacetylation to induce macroautophagy and LC3-associated microautophagy, which are necessary for eliminating cytoplasmic DNA and degrading lysosome membrane proteins, respectively.\",\n      \"method\": \"ATG7 acetylation site mutants, in vitro LC3 lipidation assay, ATG7-ATG3 co-immunoprecipitation, cell-based macroautophagy and LAP assays\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — in vitro LC3 lipidation assay plus Co-IP with functional mutants and cellular assays, single lab\",\n      \"pmids\": [\"37999993\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Endothelial ATG7 promotes angiogenesis through an autophagy-independent mechanism: in the cytoplasm, ATG7 associates with transcription factor ZNF148/ZBP-89, preventing its nuclear translocation; loss of ATG7 increases ZNF148-KPNB1 interaction promoting ZNF148 nuclear import, which upregulates STAT1, which then binds the HIF1A promoter and suppresses HIF1A expression, impairing ischemia-induced angiogenesis.\",\n      \"method\": \"EC-specific Atg7 KO mice, ChIP (STAT1 on HIF1A promoter), Co-IP (ATG7-ZNF148, ZNF148-KPNB1), HIF1A overexpression rescue, STAT1 inhibitor rescue, femoral artery ligation model\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple Co-IPs and ChIP with in vivo KO model and pharmacological rescue, single lab\",\n      \"pmids\": [\"36300763\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ATG7 suppresses IRF3-mediated interferon production in an autophagy-independent manner during influenza A virus infection by controlling expression of lncRNA GAPLINC; loss of ATG7 enhances type I and III interferon production, and the suppressive effect of ATG7 on IFN response is mediated through GAPLINC.\",\n      \"method\": \"ATG7 conditional KO mice, ATG7 overexpression/depletion in cells, transcriptome analysis, autophagy inhibitor controls, GAPLINC expression manipulation, IRF3 activation assays\",\n      \"journal\": \"PLoS Pathogens\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo KO mice, autophagy-independent function confirmed by inhibitor controls, and lncRNA mechanistic link, single lab\",\n      \"pmids\": [\"38227600\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Endothelial ATG7 is required for fibronectin production in the blood-brain barrier basement membrane via regulation of PKA activity and phosphorylation of CREB; Atg7 endothelial-specific KO reduces fibronectin expression, causing astrocytic endfeet detachment from microvessels and BBB leakage.\",\n      \"method\": \"Atg7 endothelial-specific KO mice, fibronectin immunostaining and quantification, PKA activity assays, CREB phosphorylation, astrocyte endfeet imaging, BBB permeability assays\",\n      \"journal\": \"The Journal of Cell Biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean conditional KO with defined molecular mechanism (PKA-CREB-fibronectin) and structural phenotype, single lab\",\n      \"pmids\": [\"36995368\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ATG7 hemizygosity in a PDAC model (KrasG12D/+; Trp53R172H/+) enhances tumor initiation and progression without ablating autophagy, but fewer hemizygous mice develop metastases; ATG7 promotes tumor cell invasion through succinate metabolism (Atg7+/- tumors have lower succinate), and ectopic ATG7 expression in Atg7+/- cells restores invasion without affecting autophagic capacity, demonstrating an autophagy-independent role of ATG7 in invasion and metastasis.\",\n      \"method\": \"Atg7 hemizygous PDAC mouse model, invasion assays, metabolomics (succinate), ATG7 ectopic expression rescue, autophagy capacity assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo genetic model with metabolomics and rescue experiments distinguishing autophagy-independent function, single lab\",\n      \"pmids\": [\"35867735\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"ATG7 mediates renal tubular cell apoptosis during vancomycin nephrotoxicity by binding to and activating PKC-δ; Atg7 conditional KO (proximal tubule-specific) ameliorates vancomycin-induced kidney injury and apoptosis, and this renoprotective effect is lost after injection of myc-tagged PKCδ.\",\n      \"method\": \"Proximal tubule-specific Atg7 KO mice, co-immunoprecipitation (Atg7-PKCδ), PKCδ inhibitor rescue, global gene expression analysis\",\n      \"journal\": \"FASEB Journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct Co-IP and in vivo KO rescue experiment with PKCδ, single lab\",\n      \"pmids\": [\"30589566\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ISG15 binds to ATG7 protein, reducing its degradation and thereby enhancing ATG7-dependent autophagy in pancreatic cancer cells, promoting cancer progression and gemcitabine resistance.\",\n      \"method\": \"Co-immunoprecipitation (ISG15-ATG7), ATG7 protein stability assays, autophagy flux assays, in vitro and in vivo gemcitabine resistance models\",\n      \"journal\": \"International Journal of Biological Sciences\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP with indirect functional readout, single lab\",\n      \"pmids\": [\"38385083\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"In brain microvascular endothelial cells, ATG7 knockdown reduces IL-6 expression through NF-κB-dependent transcriptional control; endothelial-specific Atg7 KO mice show decreased brain microvessel density, and exogenous IL-6 restores impaired angiogenesis caused by ATG7 knockdown, demonstrating that ATG7 promotes brain angiogenesis via NF-κB-dependent IL-6 production.\",\n      \"method\": \"Atg7 endothelial-specific KO mice, ATG7 knockdown in brain endothelial cells, IL-6 measurement, NF-κB reporter assay, IL-6 rescue experiment, microvessel density quantification\",\n      \"journal\": \"International Journal of Molecular Sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo KO plus mechanistic IL-6/NF-κB pathway dissection with rescue, single lab\",\n      \"pmids\": [\"28467355\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"ATG7 promotes bladder cancer invasion through an autophagy-mediated mechanism: ATG7-dependent autophagy causes degradation of HNRNPD protein, reducing HNRNPD interaction with ARHGDIB mRNA, which increases ARHGDIB mRNA stability and promotes invasion.\",\n      \"method\": \"ATG7 knockdown in human bladder cancer cells, HNRNPD-ARHGDIB mRNA interaction assays, ATG7-mediated HNRNPD protein degradation assays, invasion assays\",\n      \"journal\": \"Advanced Science\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, indirect mechanistic chain from ATG7 to mRNA stability via protein degradation\",\n      \"pmids\": [\"31016112\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"ATG7-mediated autophagy promotes degradation of NANOG in embryonic stem cells via SQSTM1/p62 acting as an autophagy receptor for K63-ubiquitinated NANOG; loss of ATG7 increases nuclear NANOG, prevents exit from naive pluripotency, and disrupts peri-implantation development.\",\n      \"method\": \"ATG7-depleted ESCs, SQSTM1/p62 nuclear localization and Co-IP with K63-ubiquitinated NANOG, RNA-seq, ATAC-seq, in vivo Atg7 depletion embryo analysis\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct Co-IP of SQSTM1 with ubiquitinated NANOG, ATG7 KO phenotype with multi-omic validation, single lab\",\n      \"pmids\": [\"35311460\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ATG7 is an E1-like ubiquitin-activating enzyme that sits at the hub of two autophagy-essential ubiquitin-like conjugation systems—activating LC3/Atg8 (for LC3-PE lipidation) and ATG12 (for ATG12-ATG5 conjugation)—through a catalytic Cys572 thioester mechanism; its activity is regulated by acetylation (inhibitory, disrupts ATG3 binding), K63-linked ubiquitination at K413 (by TRIM7, stimulatory) and K45 (by TRIM32 downstream of ATM-CHK2, stimulatory), and S-nitrosylation at Cys402 by Trx1 (stimulatory); independently of autophagy, ATG7 binds p53 to regulate p21 transcription and cell cycle arrest, binds PKM2 to suppress Tyr105 phosphorylation and the Warburg effect, binds caspase-9 to restrain its apoptotic activity, associates with ZNF148 in endothelial cells to control STAT1/HIF1A expression and angiogenesis, and promotes tumor invasion through succinate metabolism, making ATG7 a multifunctional effector with both canonical autophagy and autophagy-independent roles in cell cycle control, apoptosis, metabolism, and angiogenesis.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"ATG7 is an E1-like enzyme that drives canonical, LC3-lipidation-dependent macroautophagy by initiating two ubiquitin-like conjugation cascades, and it additionally functions as a multifunctional effector with autophagy-independent roles in cell cycle control, apoptosis, metabolism, and angiogenesis [#3, #2]. Its catalytic Cys572 forms the thioester intermediate required to activate and transfer both LC3/Atg8 and ATG12, and a Cys572Ser substitution acts as a dominant-negative that traps stable LC3 and ATG12 intermediates and blocks autophagosome formation [#10]. ATG7 recruits the E2 enzymes ATG3 and ATG10 through noncanonical interfaces distinct from classical ubiquitin E1-E2 contacts, and structural work shows Atg8 engages the C-terminal \\u03b1-helix and crossover loop to relieve autoinhibition during activation [#3, #7]. This catalytic step distinguishes ATG7-dependent autophagy from alternative pathways: ATG5/ATG7-independent macroautophagy proceeds via Rab9-dependent membrane fusion without LC3 lipidation, and additional ATG7/ATG3-independent LC3 lipidation and autophagy programs operate in Drosophila midgut and elicited macrophages [#1, #5, #12]. ATG7 activity is gated by post-translational modification: acetylation is inhibitory and disrupts ATG3 binding, while K63-linked ubiquitination at K413 by TRIM7 and at K45 via the ATM-CHK2-TRIM32 axis, and S-nitrosylation at Cys402 by transnitrosylating Trx1, all stimulate its E1-like activity and autophagy [#18, #15, #16, #17]. Independent of its enzymatic function, ATG7 binds p53 to control p21/CDKN1A transcription and starvation-induced cell cycle arrest, restrains caspase-9 apoptotic activity, binds PKM2 to suppress its Tyr105 phosphorylation and the Warburg effect, and in endothelial cells sequesters ZNF148 in the cytoplasm to regulate STAT1/HIF1A-dependent angiogenesis [#2, #4, #8, #19]. Biallelic loss-of-function variants in human ATG7 cause a neurodevelopmental disorder with cerebellar and corpus callosum abnormalities, with patient cells showing diminished ATG7 protein and severely reduced autophagic flux [#14].\",\n  \"teleology\": [\n    {\n      \"year\": 2004,\n      \"claim\": \"Established ATG7 as a genetically essential effector of a non-apoptotic, autophagic cell death program, framing autophagy machinery as a determinant of cell fate beyond bulk degradation.\",\n      \"evidence\": \"Genetic loss-of-function of ATG7/beclin 1 with cell death readout downstream of caspase-8 inhibition\",\n      \"pmids\": [\"15131264\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Did not define ATG7's enzymatic contribution to this death program\", \"No molecular mechanism linking ATG7 to RIP/JNK signaling\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Defined the boundary of ATG7 requirement by showing it is needed only for canonical LC3-lipidation autophagy, not for Rab9-dependent alternative macroautophagy.\",\n      \"evidence\": \"Reciprocal Atg5/Atg7 knockout mouse cells with EM and LC3 lipidation assays\",\n      \"pmids\": [\"19794493\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not establish what triggers the alternative pathway in lieu of ATG7\", \"Mechanism of Rab9-dependent membrane fusion unresolved\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Revealed the first autophagy-independent function of ATG7: enzyme-activity-independent binding to p53 to control p21 transcription and starvation-induced cell cycle arrest.\",\n      \"evidence\": \"Co-IP, E1-mutant rescue, and Atg7-KO MEFs with Chk2-deletion epistasis\",\n      \"pmids\": [\"22499945\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of ATG7-p53 binding unknown\", \"How ATG7 influences p53 target selectivity unresolved\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Provided the structural mechanism for how ATG7 recruits its E2 partners ATG3 and ATG10 through noncanonical interfaces, explaining substrate-specific routing in the two conjugation systems.\",\n      \"evidence\": \"Crystal structures of Atg7-Atg3 and Atg7-Atg10 complexes with mechanistic analysis\",\n      \"pmids\": [\"23388412\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not resolve the full activation transfer cycle in vivo\", \"Regulation of E2 selection under different stimuli unaddressed\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Extended ATG7's noncatalytic interaction network to apoptosis by demonstrating reciprocal cross-regulation with caspase-9.\",\n      \"evidence\": \"Reciprocal Co-IP with caspase catalytic mutants and LC3-II assays\",\n      \"pmids\": [\"24362031\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Reciprocal Co-IP from a single lab without structural validation\", \"Physiological context where this cross-talk dominates is undefined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Demonstrated in Drosophila that an autophagy program can run without ATG7/ATG3, instead requiring ubiquitin E1 (UBA1), reinforcing that ATG7 is specific to the ATG8 conjugation route.\",\n      \"evidence\": \"Atg7/Atg3 loss-of-function genetics in Drosophila midgut with Uba1 epistasis and EM\",\n      \"pmids\": [\"23873149\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Conservation of this UBA1-driven program in mammals untested here\", \"Membrane source for the ATG7-independent autophagy unknown\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identified acetylation as an inhibitory switch on ATG7 controlled by BAT3-modulated p300 localization, linking ATG7 activity to acetyltransferase compartmentalization.\",\n      \"evidence\": \"BAT3-KO MEFs, p300 localization, acetylation IP, cytosol-only BAT3 rescue\",\n      \"pmids\": [\"24591579\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Specific acetylated residues not pinpointed here\", \"Deacetylase responsible for reversal not identified\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Resolved the Atg8-ATG7 recognition mode, showing Atg8 binds the C-terminal helix/crossover loop to relieve autoinhibition, refining the activation mechanism.\",\n      \"evidence\": \"Crystal structure of Atg8-ATG7 C-terminal domain with mutagenesis and activation assays\",\n      \"pmids\": [\"29237558\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not capture the full thioester transfer step\", \"Conformational dynamics during catalysis not measured\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Connected ATG7 to cancer metabolism by showing it binds PKM2 and blocks its Tyr105 phosphorylation, suppressing the Warburg effect and EMT independently of autophagy.\",\n      \"evidence\": \"Co-IP, phosphorylation assays, Atg7 overexpression/knockdown, EMT assays\",\n      \"pmids\": [\"29910687\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural basis of ATG7-PKM2 binding unknown\", \"How ATG7 shields the FGFR1 target site mechanistically unresolved\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Confirmed Cys572 as the catalytic thioester residue by showing C572S traps LC3 and ATG12 intermediates and acts as a dominant-negative.\",\n      \"evidence\": \"ATG7 C572S expression with LC3/ATG12 conjugation and autophagosome assays\",\n      \"pmids\": [\"30503495\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single-lab biochemistry without structural snapshot of the trapped intermediate\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Linked posttranscriptional control of ATG7 (via CCR4-NOT deadenylation) to its p53-dependent cardiomyocyte death function, demonstrating in vivo that the ATG7-p53 axis drives pathology.\",\n      \"evidence\": \"Cnot conditional KO mice with Atg7 genetic ablation epistasis, deadenylation assays, Atg7-p53 Co-IP\",\n      \"pmids\": [\"29438013\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether p53 modulation requires ATG7 catalytic activity not fully separated\", \"Generality beyond cardiomyocytes untested\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Extended ATG7's noncatalytic protein-binding repertoire to PKC-delta activation in renal tubular apoptosis during nephrotoxicity.\",\n      \"evidence\": \"Proximal-tubule Atg7 KO mice, Atg7-PKC\\u03b4 Co-IP, PKC\\u03b4 rescue\",\n      \"pmids\": [\"30589566\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single-lab Co-IP; direct binding interface undefined\", \"Whether autophagy contributes in parallel not excluded\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showed that ATG7 engagement with LC3 is scaffolded by TP53INP2 in a trimeric LC3B-TP53INP2-ATG7 complex that promotes autophagosome formation.\",\n      \"evidence\": \"Reciprocal Co-IP, pulldown, LIR mutants, colocalization with autophagic markers\",\n      \"pmids\": [\"30767704\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural arrangement of the trimer unknown\", \"Whether TP53INP2 affects catalytic transfer or only proximity unresolved\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Implicated ATG7-dependent autophagy in bladder cancer invasion via HNRNPD degradation and ARHGDIB mRNA stabilization.\",\n      \"evidence\": \"ATG7 knockdown, HNRNPD-ARHGDIB interaction and degradation assays, invasion assays\",\n      \"pmids\": [\"31016112\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Indirect multi-step mechanistic chain from single lab\", \"Direct role of ATG7 enzymatic activity not isolated\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Showed that ATG7 protein levels are tuned by m6A modification of its mRNA, linking RNA methylation to autophagy-dependent control of senescence in osteoarthritis.\",\n      \"evidence\": \"MeRIP, RIP, mRNA stability assays, METTL3 knockdown, flux assays\",\n      \"pmids\": [\"34706873\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"m6A reader mediating decay not defined here\", \"Generality beyond synoviocytes untested\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Demonstrated a mammalian exception in macrophages where LC3-PE conjugation occurs without ATG7/ATG3 but requires ATG5, challenging the universality of the canonical lipidation model.\",\n      \"evidence\": \"Atg7/Atg5 conditional KO and ATG3-KO macrophages with LC3-II immunoblot and flux assays\",\n      \"pmids\": [\"33459130\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Alternative E1/E2 enzymes substituting for ATG7/ATG3 unidentified\", \"Mechanism restricting this to the metabolic context unknown\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Established ATG7 as indispensable for human degradative autophagy and as a Mendelian disease gene by linking biallelic loss-of-function to a neurodevelopmental disorder.\",\n      \"evidence\": \"Patient genetics, flux assays in patient fibroblasts/muscle, cross-species complementation with mutant ATG7\",\n      \"pmids\": [\"34161705\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cellular basis of cerebellar/corpus callosum pathology not fully defined\", \"Contribution of noncatalytic ATG7 functions to the phenotype unresolved\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Distinguished an autophagy-independent ATG7 role in tumor invasion mediated by succinate metabolism in a PDAC dosage model.\",\n      \"evidence\": \"Atg7 hemizygous PDAC mice, invasion assays, succinate metabolomics, ectopic ATG7 rescue without autophagy change\",\n      \"pmids\": [\"35867735\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular link between ATG7 and succinate accumulation undefined\", \"Direct enzymatic partner in this metabolic role unknown\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Identified K63-linked ubiquitination at K413 by TRIM7 as a stimulatory modification enhancing autophagy and antibacterial defense.\",\n      \"evidence\": \"Co-IP, K413 site-mutant ubiquitination assays, TRIM7-KO cells and mice\",\n      \"pmids\": [\"36576150\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How K413 ubiquitination mechanistically activates E1 function unclear\", \"Deubiquitinase reversing this mark unidentified\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Linked ATG7-dependent autophagy to NANOG turnover via SQSTM1/p62 recognition of K63-ubiquitinated NANOG, controlling exit from naive pluripotency.\",\n      \"evidence\": \"ATG7-depleted ESCs, SQSTM1 Co-IP with ubiquitinated NANOG, RNA-seq/ATAC-seq, in vivo embryo analysis\",\n      \"pmids\": [\"35311460\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Ubiquitin ligase tagging NANOG not identified\", \"Nuclear-cytoplasmic routing of the degradation step unresolved\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Mapped the ATM-CHK2-TRIM32 oxidative-stress axis to K45 K63-ubiquitination of ATG7, defining a damage-responsive activating cascade.\",\n      \"evidence\": \"Ordered phosphorylation/Co-IP assays, K45 site mutant, Chk2-/- stroke mouse model\",\n      \"pmids\": [\"37943659\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural effect of K45 modification on E1 activity unknown\", \"Interplay with K413 ubiquitination not addressed\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Defined a redox activating mechanism whereby Trx1 transnitrosylates ATG7 at Cys402 to stimulate E1 activity and cardiac protection during ischemia.\",\n      \"evidence\": \"Atg7 C402S knock-in mice, in vitro transnitrosylation reconstitution, E1 activity and ischemia model\",\n      \"pmids\": [\"36480290\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How Cys402 nitrosylation structurally enhances catalysis unresolved\", \"Crosstalk with acetylation/ubiquitination switches untested\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Confirmed acetylation as a direct inhibitory switch by showing it disrupts ATG3 binding and blocks LC3 lipidation, with deacetylation enabling macro- and microautophagy.\",\n      \"evidence\": \"Acetyl-site mutants, in vitro lipidation, ATG7-ATG3 Co-IP, cellular LAP/macroautophagy assays\",\n      \"pmids\": [\"37999993\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Deacetylase identity not established here\", \"Quantitative stoichiometry of acetylation in vivo unknown\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Defined a noncatalytic endothelial function: cytoplasmic ATG7 sequesters ZNF148 to suppress STAT1-mediated repression of HIF1A and promote ischemic angiogenesis.\",\n      \"evidence\": \"EC-specific Atg7 KO mice, ChIP, Co-IP (ATG7-ZNF148, ZNF148-KPNB1), HIF1A and STAT1-inhibitor rescue\",\n      \"pmids\": [\"36300763\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct ATG7-ZNF148 binding interface undefined\", \"Relationship to other endothelial ATG7 functions unresolved\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Extended endothelial ATG7 roles to blood-brain barrier integrity through PKA-CREB-dependent fibronectin production.\",\n      \"evidence\": \"EC-specific Atg7 KO mice, fibronectin/PKA/CREB assays, astrocyte endfeet imaging, BBB permeability\",\n      \"pmids\": [\"36995368\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether this is autophagy-dependent not fully separated\", \"Direct molecular target of ATG7 upstream of PKA unknown\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified an autophagy-independent immunosuppressive role: ATG7 limits IRF3-driven interferon production via control of lncRNA GAPLINC during influenza infection.\",\n      \"evidence\": \"ATG7 conditional KO mice, transcriptome analysis, autophagy-inhibitor controls, GAPLINC manipulation\",\n      \"pmids\": [\"38227600\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How ATG7 controls GAPLINC expression mechanistically undefined\", \"Direct ATG7 binding partner in this pathway unidentified\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Proposed ISG15 binding stabilizes ATG7 to enhance autophagy and chemoresistance in pancreatic cancer.\",\n      \"evidence\": \"Co-IP, ATG7 stability assays, gemcitabine resistance models\",\n      \"pmids\": [\"38385083\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Single Co-IP with indirect functional readout\", \"Whether ISG15 covalently modifies or non-covalently binds ATG7 unresolved\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How ATG7's catalytic E1 activity, its layered post-translational switches (acetylation, K45/K413 ubiquitination, Cys402 nitrosylation), and its diverse noncatalytic protein-binding partners are integrated and prioritized in a given physiological context remains unresolved.\",\n      \"evidence\": \"No single study reconciles the competing regulatory inputs and moonlighting interactions\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No unified structural model of how modifications converge on E1 activity\", \"Hierarchy among autophagy-dependent vs independent functions in vivo undefined\", \"Most noncatalytic partner interactions rest on single-lab Co-IP without structural validation\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [3, 7, 10, 18]},\n      {\"term_id\": \"GO:0016874\", \"supporting_discovery_ids\": [3, 10]},\n      {\"term_id\": \"GO:0140657\", \"supporting_discovery_ids\": [10, 17]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [2, 19]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [3, 11]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [11, 19]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [1, 10, 14, 18]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [2]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [0, 4, 9]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [8, 22]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [14, 22, 24]}\n    ],\n    \"complexes\": [\n      \"ATG12-ATG5 conjugation system\",\n      \"LC3B-TP53INP2-ATG7 trimeric complex\"\n    ],\n    \"partners\": [\n      \"ATG3\",\n      \"ATG10\",\n      \"LC3B\",\n      \"p53\",\n      \"PKM2\",\n      \"caspase-9\",\n      \"ZNF148\",\n      \"TP53INP2\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}