{"gene":"AIFM1","run_date":"2026-06-09T22:02:42","timeline":{"discoveries":[{"year":1999,"finding":"AIF is a mitochondrial intermembrane space flavoprotein that, upon apoptosis induction, translocates from mitochondria to the nucleus where it induces caspase-independent chromatin condensation and large-scale (~50 kb) DNA fragmentation. The protein contains an oxidoreductase domain with conserved FAD and NAD binding residues.","method":"Subcellular fractionation, nuclear microinjection, cDNA cloning, domain analysis","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 / Strong — original characterization replicated across multiple subsequent studies; multiple orthogonal methods including nuclear microinjection and fractionation","pmids":["10381654"],"is_preprint":false},{"year":2000,"finding":"AIF is a ubiquitously expressed X-linked gene product imported into the mitochondrial intermembrane space as a FAD-containing flavoprotein; upon apoptotic stimuli it translocates through the outer mitochondrial membrane to the cytosol and nucleus, inducing chromatin condensation and ~50 kb DNA fragmentation in a caspase-independent manner.","method":"Subcellular fractionation, immunofluorescence, microinjection into purified nuclei, Western blot","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods, consistent with independent replication across labs","pmids":["10913597"],"is_preprint":false},{"year":2002,"finding":"AIF exhibits NADH oxidase activity and can participate in regulation of apoptotic mitochondrial membrane permeabilization in addition to its nuclear apoptogenic function. HSP70 neutralizes AIF in a reaction independent of ATP and the HSP70 ATP-binding domain, inhibiting caspase-independent cell death.","method":"Co-immunoprecipitation, microinjection of anti-AIF antibody, AIF gene knockout, HSP70 overexpression","journal":"Biochimie","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP and knockout experiments, single review article compiling multiple experimental approaches","pmids":["12022952"],"is_preprint":false},{"year":2002,"finding":"Crystal structures of human and mouse AIF were determined; mutations that abolish the AIF-DNA electrostatic interaction suppress AIF-induced chromatin condensation but have no effect on NADH oxidase activity, demonstrating that the apoptogenic and oxidoreductase functions of AIF are dissociable.","method":"Crystal structure determination, active-site mutagenesis, nuclear condensation assay","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structure plus functional mutagenesis dissociating two activities","pmids":["12432061"],"is_preprint":false},{"year":2002,"finding":"In C. elegans, the AIF homolog WAH-1 localizes to mitochondria and is released into the cytosol and nucleus in a CED-3 (caspase)-dependent manner downstream of the BH3-domain protein EGL-1. WAH-1 associates and cooperates with CPS-6/endonuclease G to promote apoptotic DNA degradation, defining a conserved mitochondria-initiated DNA degradation pathway.","method":"RNAi knockdown, subcellular localization, co-immunoprecipitation, DNA degradation assay","journal":"Science","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — reconstitution of cooperation with EndoG in vitro, genetic epistasis in C. elegans with multiple orthogonal methods","pmids":["12446902"],"is_preprint":false},{"year":2003,"finding":"Pro-apoptotic Bcl-2 proteins (Bax/Bak) cause release of cytochrome c, Smac/DIABLO, and HtrA2/Omi but NOT AIF or EndoG from mitochondria; release of AIF and EndoG requires caspase activation downstream of Bax/Bak permeabilization, demonstrating a hierarchical ordering of mitochondrial apoptogenic factor release.","method":"Isolated mitochondria assay, caspase inhibitor (zVAD-fmk), Apaf-1 knockout cells, Western blot of subcellular fractions","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — reconstituted with isolated mitochondria and confirmed in cells with genetic and pharmacological tools","pmids":["12941691"],"is_preprint":false},{"year":2004,"finding":"Human and mouse cells lacking AIF via homologous recombination or siRNA show high lactate production, enhanced glycolysis, and severe reduction of respiratory chain complex I activity. AIF-deficient cells have reduced complex I content and subunit levels, pointing to a role of AIF in biogenesis/maintenance of complex I. Harlequin mice with reduced AIF also show reduced OXPHOS in retina and brain with reduced complex I subunits.","method":"Homologous recombination KO, siRNA, metabolic flux measurements, BN-PAGE, Western blot of complex I subunits","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple orthogonal approaches (KO + siRNA + Harlequin mouse model + biochemical complex I measurements)","pmids":["15526035"],"is_preprint":false},{"year":2004,"finding":"Cyclophilin A (CypA) directly interacts with AIF as determined by mass spectrometry, co-immunoprecipitation, and pull-down assays. AIF and CypA co-localize in the nucleus during early caspase-independent chromatin condensation and synergize in vitro to degrade plasmid DNA and induce DNA loss in purified nuclei. AIF mutants lacking the CypA-binding domain are inefficient apoptosis sensitizers.","method":"Mass spectrometry, co-immunoprecipitation, pull-down assay, in vitro DNA degradation, CypA knockout cells, mutagenesis","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple orthogonal binding methods plus functional validation in CypA-KO cells and domain mutagenesis","pmids":["14716299"],"is_preprint":false},{"year":2004,"finding":"The yeast AIF homolog Ynr074cp (renamed Aif1p) localizes to mitochondria and translocates to the nucleus in response to apoptotic stimuli. Purified Ynr074cp degrades yeast nuclei and plasmid DNA. YNR074C disruption rescues yeast from oxygen stress and delays age-induced apoptosis; its pro-death effect is attenuated by disruption of cyclophilin A or the yeast caspase YCA1.","method":"Gene disruption, overexpression, subcellular localization, in vitro DNA degradation assay, genetic epistasis","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — reconstituted DNA degradation activity plus genetic epistasis in yeast","pmids":["15381687"],"is_preprint":false},{"year":2005,"finding":"Hsp70 binds directly to AIF (shown by co-immunoprecipitation) and sequesters it in the cytosol, preventing nuclear translocation of AIF and reducing neonatal hypoxic/ischemic brain injury. Hsp70 overexpression reduced nuclear AIF without affecting cytosolic AIF levels.","method":"Co-immunoprecipitation, Western blot of subcellular fractions, transgenic mouse model of hypoxia-ischemia","journal":"Journal of cerebral blood flow and metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus in vivo transgenic model, single lab","pmids":["15244251"],"is_preprint":false},{"year":2005,"finding":"BimEL upregulation by MPP+ leads to increased calpain I activity, which directly mediates AIF release from isolated mitochondria. Calpain inhibition or BimEL knockdown reduces AIF release and cell death. Under cell-free conditions, activated purified calpain I releases AIF from isolated mitochondria independently of BimEL or JNK.","method":"Cell-free mitochondrial release assay with purified calpain I, siRNA knockdown of BimEL, calpain inhibitors, Western blot","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 1 / Moderate — cell-free reconstitution of calpain-mediated AIF release plus siRNA confirmation","pmids":["15941767"],"is_preprint":false},{"year":2006,"finding":"AIF gene expression is positively regulated by p53 at basal levels via a p53 responsive element in the AIF gene promoter that is bound by p53 within cells. p53-driven large-scale DNA fragmentation (an AIF activity hallmark) is compromised in cells lacking functional p53. Caspase-independent death is also impaired in p53-deficient cells.","method":"Chromatin immunoprecipitation, luciferase reporter assay, p53-deficient cells, large-scale DNA fragmentation assay","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP plus reporter assay plus functional readout, single lab","pmids":["16729031"],"is_preprint":false},{"year":2008,"finding":"GPx4 inactivation triggers 12/15-lipoxygenase-derived lipid peroxidation as a specific downstream event that triggers AIF-mediated cell death. siRNA-mediated AIF silencing entirely prevents cell death in this pathway. Neuron-specific GPx4 depletion causes neurodegeneration via this pathway.","method":"Inducible GPx4 knockout in mice and cells, siRNA silencing of AIF, 12/15-lipoxygenase inhibitors, alpha-tocopherol rescue","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple genetic and pharmacological tools across cell and mouse models confirming AIF's epistatic position","pmids":["18762024"],"is_preprint":false},{"year":2009,"finding":"Poly(ADP-ribose) (PAR) polymer generated in the nucleus by PARP-1 after DNA damage translocates to mitochondria to mediate AIF release; this PAR signal is the key event initiating nuclear-to-mitochondrial crosstalk in parthanatos (PARP-1-dependent caspase-independent cell death).","method":"Review summarizing experimental evidence including PAR polymer localization, AIF release assays, and PARP-1 genetic/pharmacological manipulation","journal":"Experimental neurology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mechanistic model supported by cited experimental evidence but this paper is a review; underlying experiments established elsewhere","pmids":["19332058"],"is_preprint":false},{"year":2010,"finding":"AIF associates with histone H2AX in the nucleus through its C-terminal proline-rich binding domain (PBD, residues 543–559), generating an active DNA-degrading complex with cyclophilin A (CypA). Deletion or mutagenesis of the AIF C-terminal PBD abolishes AIF/H2AX interaction and AIF-mediated chromatinolysis. H2AX genetic ablation or CypA downregulation confers resistance to programmed necrosis.","method":"Co-immunoprecipitation, directed mutagenesis, H2AX knockout cells, siRNA knockdown of CypA, MNNG-induced necrosis assay","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — mutagenesis of AIF binding domain, genetic KO of H2AX, and pharmacological/siRNA validation all in one study","pmids":["20360685"],"is_preprint":false},{"year":2010,"finding":"AIF is N-terminally anchored to the inner mitochondrial membrane rather than being freely soluble in the intermembrane space; it must be proteolytically cleaved from its membrane anchor prior to release into the cytosol.","method":"Membrane fractionation, protease protection assay, reviewed experimental evidence","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — review article summarizing experimental fractionation data, mechanism of membrane anchorage and cleavage requirement established","pmids":["20494118"],"is_preprint":false},{"year":2011,"finding":"In MNNG-induced necroptosis, BID acts as a link between calpain activation and BAX activation upstream of AIF release. Calpains directly process BID into tBID; calpain non-cleavable BID mutants (BID-G70A or BID-Δ68-71) abolish BAX activation and necroptosis. BID genetic ablation blocks both BAX activation and AIF-mediated necroptosis.","method":"Knockout MEFs, BID reintroduction rescue, calpain cleavage assay, BID point mutants, Western blot, cell death assays","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — genetic KO rescue experiments plus biochemical cleavage assays establishing sequential pathway","pmids":["21738214"],"is_preprint":false},{"year":2011,"finding":"AIF is imported into mitochondria via the endoplasmic reticulum through mitochondria-associated membranes (MAM) and transport vesicles. DRP1, ATAD3A, and mitofusin-2 are required for this import pathway; knockdown of DRP1 increased AIF in MAM while reducing it in mitochondria; knockdown of ATAD3A or Mfn-2 increased cytosolic AIF transport vesicles.","method":"Sucrose gradient ultracentrifugation, immunoblotting, DRP1/ATAD3A/Mfn-2 siRNA knockdown","journal":"International journal of molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — single lab, biochemical fractionation with siRNA knockdowns, novel pathway claim with limited orthogonal validation","pmids":["22134679"],"is_preprint":false},{"year":2012,"finding":"ATM and DNA-PK kinases phosphorylate histone H2AX at Ser139 (generating γH2AX) in a synergistic manner during MNNG-induced necroptosis. γH2AX is required for AIF-mediated chromatinolysis; H2AX S139A mutation or H2AX knockout abolishes both chromatinolysis and necroptosis, whereas phosphomimetic H2AX-S139E restores sensitivity.","method":"ATM/DNA-PK pharmacological inhibitors, H2AX knockout cells, H2AX point mutant rescue, siRNA","journal":"Cell death & disease","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple genetic and pharmacological tools; phosphomimetic rescue provides causal evidence","pmids":["22972376"],"is_preprint":false},{"year":2015,"finding":"AIF directly interacts with CHCHD4 (human MIA40), the central component of the mitochondrial intermembrane space import machinery. AIF depletion or hypomorphic mutation reduces CHCHD4 protein levels by diminishing its mitochondrial import. CHCHD4 depletion alone recapitulates the respiratory defect of AIF-deficient cells. Restoring CHCHD4 mitochondrial localization independently of AIF rescues respiratory function and enables cavitation in AIF-deficient embryoid bodies.","method":"Co-immunoprecipitation, siRNA, CHCHD4 mitochondrial targeting construct rescue, respiratory chain activity assay, AIF-KO embryoid bodies","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — mechanistic rescue experiment plus Co-IP plus functional respiratory assays in multiple model systems","pmids":["26004228"],"is_preprint":false},{"year":2015,"finding":"AIF physically interacts with and protects PTEN from oxidation-mediated inactivation. AIF knockdown causes oxidative inactivation of PTEN's lipid phosphatase activity, leading to Akt activation, GSK-3β phosphorylation, β-catenin activation, and ultimately EMT and tumor metastasis. PTEN was also identified as a mitochondrial protein.","method":"Co-immunoprecipitation, lipid phosphatase activity assay, AIF knockdown, oxidation assay, xenograft model","journal":"EMBO reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP plus enzymatic assay plus cell-based and in vivo validation, single lab","pmids":["26415504"],"is_preprint":false},{"year":2015,"finding":"Reconstituted AIF and AMID, when inserted into bacterial or mitochondrial membranes, function as NADH:ubiquinone oxidoreductases (NDH-2) sensitive to rotenone and the quinone-binding inhibitor HQNO, and support NADH-linked proton pumping. N-terminally tagged AIF enhances growth of E. coli lacking complex I and NDH-2; NADH-binding site mutants and disease mutant AIFΔR201 show decreased activity.","method":"Membrane reconstitution, NADH:ubiquinone oxidoreductase activity assay, proton pumping assay, E. coli growth complementation, mutagenesis","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution plus mutagenesis plus bacterial complementation, single lab","pmids":["26063804"],"is_preprint":false},{"year":2015,"finding":"Cytosolic/nuclear thioredoxin-1 (Trx1) directly interacts with AIF under physiological conditions via its active-site cysteines; this interaction is disrupted by oxidative stress. Nuclear Trx1 hinders AIF-DNA interaction, attenuating AIF-mediated DNA damage. Disruption of the Trx1-AIF interaction correlates with nuclear AIF translocation.","method":"Co-immunoprecipitation, Trx1 active-site mutants, oxidative stress perturbation, nuclear fractionation, DNA damage assay","journal":"Free radical biology & medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with mutagenesis and functional DNA damage readout, single lab","pmids":["26119781"],"is_preprint":false},{"year":2016,"finding":"Structural and functional characterization of four pathological AIFM1 variants (V243L, G262S, G308E, G338E): G308E drastically impairs redox properties and mitochondrial respiration; V243L and G338E show minimal structural changes, suggesting reduced cellular expression is the pathogenic driver; G262S shows structural/redox alterations more severe than predicted by clinical phenotype.","method":"Protein purification, spectroscopic characterization, redox activity assay, cell respiration measurement, structural analysis","journal":"Journal of molecular biology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro biochemical reconstitution and structure-function analysis of multiple variants, single lab","pmids":["27178839"],"is_preprint":false},{"year":2017,"finding":"The AIF(370–394) peptide binds CypA at a surface overlapping with the cyclosporin A binding site near the catalytic pocket; NMR and biochemical mapping established that AIF(Δ1–121) and the AIF(370–394) peptide bind the same CypA surface and compete with CsA.","method":"NMR spectroscopy, pull-down assay, molecular modeling, competition binding assay","journal":"Scientific reports","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR structural mapping plus biochemical validation, single lab","pmids":["28442737"],"is_preprint":false},{"year":2017,"finding":"High-risk HPV E6 oncoprotein (HPV16 E6) directly binds all three forms of AIF and induces proteasome-dependent reduction of AIF expression, thereby suppressing AIF-mediated caspase-independent apoptosis. Low-risk HPV6 E6 also binds AIF but does not reduce its levels.","method":"Co-immunoprecipitation, MG132 proteasome inhibitor, flow cytometry for chromatin degradation, AIF knockdown","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP plus proteasome inhibitor rescue plus functional apoptosis readout, single lab","pmids":["32848167"],"is_preprint":false},{"year":2019,"finding":"Deletion of AIF in a KrasG12D-driven mouse lung cancer model causes OXPHOS deficiency and metabolic shift toward glycolysis, reducing tumor growth. Re-expression of wild-type or apoptosis-deficient AIF (intact mitochondrial function) both restored OXPHOS and reduced animal survival, demonstrating that AIF's mitochondrial respiratory function (not its apoptotic function) drives lung cancer progression.","method":"Conditional AIF KO mouse in KrasG12D model, re-expression of WT vs. apoptosis-mutant AIF, Seahorse metabolic profiling","journal":"Cell research","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic rescue experiment dissociating apoptotic from metabolic AIF functions, multiple experimental approaches","pmids":["31133695"],"is_preprint":false},{"year":2021,"finding":"CAPN1 (calpain-1) is activated by calcium overload, associates with mitochondria, and cleaves mitochondrion-bound AIF; cleaved AIF translocates to the nucleus to trigger large-scale DNA fragmentation and necrotic cell death in cardiomyocytes. AIF oxidation at cysteine residues by a depleted thioredoxin-2 system potentiates this effect. A cyclophilin A (PPIA)-binding AIF peptide blocks PPIA-mediated AIF nuclear translocation.","method":"Calpain-1 inhibitor, CAST overexpression, AIF-mimetic peptide, mouse model of arrhythmogenic cardiomyopathy, ES cell-derived cardiomyocytes, immunoprecipitation","journal":"Science translational medicine","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — multiple genetic and pharmacological interventions in mouse and cell models; mechanistic chain from Ca2+ → CAPN1 → AIF cleavage → nuclear translocation established","pmids":["33597260"],"is_preprint":false},{"year":2021,"finding":"OTUD1 deubiquitinase deubiquitinates AIF at K244, disrupting mitochondrial structure and compromising OXPHOS, and at K255, enhancing AIF DNA-binding ability to promote parthanatos. OTUD1 thus controls both the mitochondrial survival and nuclear apoptogenic functions of AIF through distinct ubiquitination sites.","method":"Deubiquitination assay, specific ubiquitination site mutagenesis (K244, K255), OXPHOS measurement, DNA-binding assay, cell death assay","journal":"Advanced science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — site-specific mutagenesis plus functional assays, single lab","pmids":["33898171"],"is_preprint":false},{"year":2021,"finding":"PAK5 phosphorylates AIF at Thr281, inhibiting formation of the AIF/importin α3 complex and thereby preventing AIF nuclear translocation. PAK5 also decreases mitochondrial membrane permeability to reduce AIF release from mitochondria.","method":"Phosphorylation assay, AIF Thr281 mutagenesis, co-immunoprecipitation with importin α3, mitochondrial membrane permeability measurement, in vivo breast cancer model","journal":"International journal of biological sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — site-specific phosphorylation plus Co-IP showing disrupted importin α3 interaction, single lab","pmids":["33867848"],"is_preprint":false},{"year":2022,"finding":"AIFM1 forms a stable long-lived complex with MIA40/CHCHD4 in vitro and in cells/tissues. In AIFM1-KO HEK293 cells, MIA40 is present in monomeric form and cannot efficiently interact with or import specific substrates, particularly NDUFS5. Loss of mitochondrial NDUFS5 causes its cytosolic proteasomal degradation and stalls complex I assembly. AIFM1 thus serves dual overlapping functions: importing MIA40 and constituting an integral part of the disulfide relay.","method":"In vitro complex reconstitution, AIFM1 KO cell lines, MIA40 substrate import assay, NDUFS5 localization, complex I assembly analysis, BN-PAGE","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — in vitro reconstitution plus genetic KO with multiple biochemical readouts establishing mechanism","pmids":["35859387"],"is_preprint":false},{"year":2023,"finding":"SIRT5-mediated desuccinylation of AIFM1 is required for the AIFM1-CHCHD4 interaction; reduced SIRT5 increases AIFM1 succinylation, abolishing the AIFM1-CHCHD4 interaction and reducing ETC complex subunit import, leading to mitochondrial dysfunction. IP-MS and Co-IP confirmed AIFM1 as a direct SIRT5 substrate.","method":"Immunoprecipitation-mass spectrometry (IP-MS), co-immunoprecipitation, SIRT5 overexpression/KO, succinylation assay, ETC complex subunit measurement","journal":"Experimental & molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — IP-MS plus Co-IP plus SIRT5 KO phenotype, single lab","pmids":["36653443"],"is_preprint":false},{"year":2023,"finding":"An AIFM1 variant (c.1265 G>A) causes a splicing change resulting in impaired AIF dimerization, which weakens AIF-CHCHD4 interaction, inhibits mitochondrial import of ETC complex subunits, impairs MICU1-MICU2 heterodimerization leading to mitochondrial calcium overload, and activates calpain-mediated AIF cleavage and nuclear translocation triggering caspase-independent apoptosis in patient iPSC-derived neurons.","method":"Patient iPSC-derived neurons, CRISPR/Cas9 isogenic correction, Co-IP for AIF-CHCHD4 interaction, ETC subunit import assay, mitochondrial Ca2+ measurement, calpain activity assay","journal":"Cell death & disease","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — isogenic CRISPR correction plus multiple orthogonal mechanistic assays in patient-derived neurons","pmids":["37365177"],"is_preprint":false},{"year":2021,"finding":"LONP1 directly interacts with AIFM1 in mitochondria; LONP1 ablation leads to AIFM1 translocation from cytoplasm to nucleus causing oocyte apoptosis and progressive oocyte death.","method":"Co-immunoprecipitation/LC-MS, conditional Lonp1 knockout mice, AIFM1 nuclear translocation by immunofluorescence","journal":"EBioMedicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP/MS plus in vivo KO phenotype with nuclear translocation readout, single lab","pmids":["34974310"],"is_preprint":false},{"year":2016,"finding":"RIP3 forms a complex with AIF in the nucleus following ischemia/reperfusion injury; their interaction was detected by co-immunoprecipitation and co-localization, and formation of this RIP3-AIF nuclear complex is critical for ischemic neuronal DNA degradation and programmed necrosis. The necrostatin-1 RIP3 inhibitor prevents both complex formation and nuclear translocation.","method":"Immunoprecipitation, immunofluorescence co-localization, necrostatin-1 inhibitor, Western blot of nuclear fractions, rat global cerebral ischemia model","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP plus in vivo pharmacological inhibition, single lab","pmids":["27377128"],"is_preprint":false},{"year":2022,"finding":"AIF ubiquitination by interaction with UBA52 under hypoxia leads to mitochondrial dysfunction (impaired OXPHOS, increased glycolysis and ROS) via loss of complex I activity. AIF deficiency also triggers abnormal mitophagy through AIF-UBA52 interaction. AAV-mediated AIF overexpression protects against hypoxia-induced pulmonary vascular remodeling.","method":"Co-IP with mass spectrometry, Seahorse extracellular flux analysis, AAV overexpression, electron microscopy","journal":"Cell & bioscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP/MS plus functional metabolic assays plus in vivo rescue, single lab","pmids":["35090552"],"is_preprint":false}],"current_model":"AIFM1/AIF is a mitochondrial inner membrane-anchored FAD-dependent NADH oxidoreductase that, under normal conditions, supports respiratory chain complex I biogenesis and OXPHOS by acting as an integral component of the MIA40/CHCHD4-dependent disulfide relay responsible for importing nuclear-encoded complex I subunits (e.g., NDUFS5); upon apoptotic or necrotic stimuli, AIF is proteolytically cleaved from its membrane anchor (a step facilitated by calpains), released into the cytosol, and imported into the nucleus via importin α3, where—through its C-terminal proline-rich domain—it assembles a DNA-degrading complex with histone H2AX (phosphorylated at Ser139 by ATM and DNA-PK) and cyclophilin A (CypA) to drive large-scale DNA fragmentation and caspase-independent chromatinolysis; AIF nuclear translocation and activity are regulated by post-translational modifications including SIRT5-mediated desuccinylation (required for CHCHD4 interaction), PAK5-mediated Thr281 phosphorylation (inhibiting importin α3 binding), OTUD1-mediated deubiquitination at K244/K255, and redox modulation by thioredoxin-1; upstream, PAR polymer generated by PARP-1, calpain activation (downstream of BID/tBID), and BAX are key pathway nodes, while HSP70 and LONP1 act as retention factors that suppress AIF nuclear translocation."},"narrative":{"mechanistic_narrative":"AIFM1 (AIF) is a FAD-dependent NADH oxidoreductase of the mitochondrial intermembrane space that performs two genetically separable functions: support of mitochondrial respiration under normal conditions and execution of caspase-independent cell death upon apoptotic or necrotic stress [PMID:10381654, PMID:12432061, PMID:15526035]. In its housekeeping role, AIF is N-terminally anchored to the inner mitochondrial membrane and acts as an integral component of the MIA40/CHCHD4 disulfide-relay import machinery: it both imports MIA40/CHCHD4 and stabilizes the relay, enabling mitochondrial import of nuclear-encoded respiratory subunits such as NDUFS5 and thereby driving complex I biogenesis and OXPHOS [PMID:20494118, PMID:26004228, PMID:35859387]. Loss of AIF collapses complex I content and forces a glycolytic shift [PMID:15526035], and this respiratory function—independent of its apoptotic activity—is sufficient to drive Kras-driven lung tumor progression [PMID:31133695]. The AIF–CHCHD4 interaction is gated by post-translational modification, requiring SIRT5-mediated desuccinylation and proper AIF dimerization [PMID:36653443, PMID:37365177]. Crystallographic and reconstitution work shows the apoptogenic and oxidoreductase activities are dissociable, with AIF functioning in membranes as a rotenone-sensitive NADH:ubiquinone oxidoreductase [PMID:12432061, PMID:26063804]. In the death program, AIF must be proteolytically released from its membrane anchor—a step executed by calpains downstream of calcium overload and BID/tBID-mediated BAX activation [PMID:15941767, PMID:20494118, PMID:21738214, PMID:33597260]—after which it translocates to the nucleus and assembles a DNA-degrading complex with cyclophilin A and γH2AX via its C-terminal proline-rich domain to drive large-scale chromatinolysis [PMID:14716299, PMID:20360685, PMID:22972376]. This pathway is held in check by retention and modification factors including HSP70 and LONP1, redox modulation by thioredoxin-1, and regulatory PTMs (OTUD1 deubiquitination, PAK5 phosphorylation blocking importin-α3 binding) [PMID:15244251, PMID:26119781, PMID:33898171, PMID:33867848, PMID:34974310]. Pathogenic AIFM1 variants impair redox properties, dimerization, and CHCHD4 binding, causing mitochondrial respiratory deficiency [PMID:27178839, PMID:37365177].","teleology":[{"year":1999,"claim":"Established AIF as the founding mitochondrial effector of caspase-independent death, answering whether mitochondria harbor an apoptogenic factor distinct from cytochrome c.","evidence":"Subcellular fractionation, nuclear microinjection, and cDNA cloning identifying an IMS flavoprotein that translocates to the nucleus to drive chromatin condensation and ~50 kb DNA fragmentation","pmids":["10381654","10913597"],"confidence":"High","gaps":["Did not identify the nuclear DNA-degrading partners","Mechanism of release from mitochondria unresolved"]},{"year":2002,"claim":"Demonstrated that AIF's oxidoreductase and apoptogenic activities are structurally and functionally separable, reframing AIF as a bifunctional protein rather than a single-activity death factor.","evidence":"Crystal structures of human/mouse AIF with active-site mutagenesis dissociating DNA-binding-dependent chromatin condensation from NADH oxidase activity; HSP70 neutralization by Co-IP/KO","pmids":["12432061","12022952"],"confidence":"High","gaps":["Physiological substrate of the oxidoreductase activity not defined","How DNA binding triggers chromatinolysis unclear"]},{"year":2002,"claim":"Showed the death pathway is evolutionarily conserved, establishing AIF homologs as components of a mitochondria-initiated DNA degradation program acting with endonuclease G.","evidence":"RNAi, localization, Co-IP, and DNA degradation assays in C. elegans (WAH-1) defining caspase-dependent release and cooperation with CPS-6/EndoG","pmids":["12446902"],"confidence":"High","gaps":["Conservation of the EndoG cooperation in mammals not addressed here"]},{"year":2003,"claim":"Ordered the mitochondrial apoptogenic release hierarchy, showing AIF release is downstream of and dependent on caspase activation rather than concurrent with cytochrome c.","evidence":"Isolated mitochondria assays, zVAD-fmk, and Apaf-1 KO cells distinguishing Bax/Bak-driven release of cytochrome c from caspase-dependent AIF/EndoG release","pmids":["12941691"],"confidence":"High","gaps":["Protease(s) directly cleaving membrane-anchored AIF not identified here"]},{"year":2004,"claim":"Revealed an unexpected housekeeping role for AIF in respiratory chain complex I biogenesis, separating its survival function from its death function.","evidence":"Homologous-recombination KO, siRNA, BN-PAGE, metabolic flux, and Harlequin mouse analysis showing reduced complex I content and enhanced glycolysis on AIF loss","pmids":["15526035"],"confidence":"High","gaps":["Molecular mechanism linking AIF to complex I assembly not yet defined"]},{"year":2004,"claim":"Identified the nuclear partners that convert AIF into an active nuclease complex, beginning to explain how AIF—lacking intrinsic nuclease activity—degrades DNA.","evidence":"Mass spectrometry, Co-IP, pull-downs, CypA-KO cells, and mutagenesis showing direct AIF-CypA interaction and synergistic DNA degradation; yeast Aif1p reconstitution and genetic epistasis with cyclophilin/YCA1","pmids":["14716299","15381687"],"confidence":"High","gaps":["Whether CypA is the catalytic nuclease vs. a cofactor unresolved","Additional complex members not yet defined"]},{"year":2005,"claim":"Defined upstream release and retention controls, showing calpain directly liberates AIF from mitochondria while HSP70 sequesters it cytosolically.","evidence":"Cell-free mitochondrial release with purified calpain I, BimEL siRNA, calpain inhibitors; HSP70 Co-IP and transgenic hypoxia-ischemia mouse model","pmids":["15941767","15244251"],"confidence":"High","gaps":["Exact AIF cleavage site by calpain not mapped here","HSP70 study single lab"]},{"year":2006,"claim":"Placed AIF under transcriptional control of p53, linking the DNA-damage response to AIF abundance and caspase-independent death.","evidence":"ChIP, luciferase reporter, and p53-deficient cells with large-scale DNA fragmentation readout","pmids":["16729031"],"confidence":"Medium","gaps":["Single lab","Contribution relative to post-translational regulation unclear"]},{"year":2008,"claim":"Positioned AIF as the obligatory executioner downstream of lipid peroxidation in a GPx4-controlled cell death pathway.","evidence":"Inducible GPx4 KO in mice/cells, AIF siRNA, 12/15-lipoxygenase inhibitors, and alpha-tocopherol rescue establishing AIF's epistatic position","pmids":["18762024"],"confidence":"High","gaps":["How lipid peroxidation signals to AIF release not mechanistically defined"]},{"year":2009,"claim":"Identified PAR polymer as the nucleus-to-mitochondria signal initiating AIF release in PARP-1-dependent parthanatos.","evidence":"Review compiling PAR localization, AIF release assays, and PARP-1 genetic/pharmacological manipulation","pmids":["19332058"],"confidence":"Medium","gaps":["Review-level synthesis","Direct PAR-AIF binding mechanism not established here"]},{"year":2010,"claim":"Resolved the molecular architecture of the lethal nuclear complex, mapping AIF's C-terminal proline-rich domain as the H2AX-binding interface required for chromatinolysis.","evidence":"Co-IP, directed mutagenesis of AIF PBD (residues 543-559), H2AX-KO cells, CypA siRNA, and MNNG necrosis assays; membrane-anchorage fractionation defining the cleavage requirement","pmids":["20360685","20494118"],"confidence":"High","gaps":["Stoichiometry and catalytic mechanism of the AIF/H2AX/CypA complex unresolved"]},{"year":2011,"claim":"Wired the proximal necroptotic cascade upstream of AIF, showing calpain-processed tBID activates BAX to permit AIF release.","evidence":"KO MEFs with BID rescue, calpain cleavage assays, and BID point mutants (G70A, Δ68-71) in MNNG necroptosis","pmids":["21738214"],"confidence":"High","gaps":["Direct biochemical link between BAX activation and calpain-mediated AIF cleavage not fully reconstituted"]},{"year":2011,"claim":"Proposed a non-canonical ER/MAM-vesicular route for AIF mitochondrial import requiring fission and tethering machinery.","evidence":"Sucrose-gradient fractionation and DRP1/ATAD3A/Mfn-2 siRNA knockdowns","pmids":["22134679"],"confidence":"Medium","gaps":["Single lab with limited orthogonal validation","Reconciliation with canonical IMS import not addressed"]},{"year":2012,"claim":"Established the upstream kinase signal licensing chromatinolysis, showing ATM/DNA-PK-generated γH2AX is required for AIF-mediated DNA degradation.","evidence":"ATM/DNA-PK inhibitors, H2AX-KO cells, S139A loss-of-function and S139E phosphomimetic rescue in MNNG necroptosis","pmids":["22972376"],"confidence":"High","gaps":["How γH2AX promotes AIF complex assembly mechanistically unclear"]},{"year":2015,"claim":"Defined the mechanism of AIF's respiratory function, showing AIF imports and stabilizes CHCHD4/MIA40 to power the IMS disulfide relay.","evidence":"Co-IP, siRNA, CHCHD4 mitochondrial-targeting rescue, respiratory assays, and AIF-KO embryoid bodies; membrane-reconstituted NDH-2 activity and E. coli complementation","pmids":["26004228","26063804"],"confidence":"High","gaps":["Full set of relay substrates not enumerated here","Relationship between NDH-2 quinone activity and import role unclear"]},{"year":2015,"claim":"Uncovered redox and signaling roles beyond respiration, including AIF-mediated protection of PTEN from oxidation and Trx1 restraint of nuclear AIF.","evidence":"Co-IP, lipid phosphatase and oxidation assays, xenografts (PTEN); Trx1 active-site mutants, fractionation, and DNA damage assays","pmids":["26415504","26119781"],"confidence":"Medium","gaps":["Both single-lab","Direct redox chemistry between AIF and partners not fully defined"]},{"year":2016,"claim":"Linked AIFM1 missense variants to mitochondrial disease through distinct molecular defects in redox properties or protein stability.","evidence":"Purification, spectroscopy, redox and respiration assays, and structural analysis of V243L, G262S, G308E, G338E variants","pmids":["27178839"],"confidence":"High","gaps":["Genotype-phenotype correlation imperfect (G262S more severe biochemically than clinically)"]},{"year":2016,"claim":"Added RIP3 as a nuclear AIF partner in ischemic programmed necrosis.","evidence":"Co-IP, co-localization, necrostatin-1 inhibition, and nuclear fractionation in a rat cerebral ischemia model","pmids":["27377128"],"confidence":"Medium","gaps":["Single lab","Functional consequence of RIP3-AIF binding for DNA degradation not mechanistically dissected"]},{"year":2017,"claim":"Mapped the AIF-CypA interface at atomic resolution and showed it overlaps the cyclosporin A site, enabling pharmacological targeting.","evidence":"NMR spectroscopy, pull-downs, modeling, and CsA competition binding of AIF peptides","pmids":["28442737"],"confidence":"High","gaps":["Whether competing the interface blocks chromatinolysis in vivo not tested here"]},{"year":2019,"claim":"Demonstrated that AIF's mitochondrial respiratory function, not its apoptotic activity, drives tumor progression in vivo.","evidence":"Conditional AIF KO in KrasG12D mouse lung cancer with WT vs. apoptosis-mutant AIF re-expression and Seahorse profiling","pmids":["31133695"],"confidence":"High","gaps":["Therapeutic exploitability of AIF respiratory dependence untested here"]},{"year":2021,"claim":"Defined a coherent calcium → calpain → AIF cleavage → nuclear translocation axis in cardiomyocyte necrosis, integrating redox potentiation and CypA-dependent import.","evidence":"Calpain-1 inhibition, CAST overexpression, AIF-mimetic peptide, and arrhythmogenic cardiomyopathy mouse/cardiomyocyte models","pmids":["33597260"],"confidence":"High","gaps":["Precise calpain cleavage site and thioredoxin-2 redox target residues not fully mapped"]},{"year":2021,"claim":"Established PTM control of AIF's dual functions and identified retention factors, with OTUD1 and PAK5 acting at distinct steps and LONP1 restraining nuclear translocation.","evidence":"Site-specific K244/K255 deubiquitination assays (OTUD1); Thr281 phosphorylation and importin-α3 Co-IP (PAK5); LONP1 Co-IP/MS and conditional KO oocyte model","pmids":["33898171","33867848","34974310"],"confidence":"Medium","gaps":["All single-lab","Crosstalk and hierarchy among these PTMs unresolved"]},{"year":2022,"claim":"Consolidated the AIFM1–MIA40 relay mechanism, showing AIFM1 loss leaves MIA40 monomeric and stalls complex I via failed NDUFS5 import and its cytosolic degradation.","evidence":"In vitro complex reconstitution, AIFM1-KO HEK293 cells, MIA40 substrate import assays, NDUFS5 localization, and BN-PAGE; UBA52-AIF ubiquitination linked to hypoxic mitochondrial dysfunction","pmids":["35859387","35090552"],"confidence":"High","gaps":["Breadth of relay substrates beyond NDUFS5 incompletely defined","UBA52 study single lab"]},{"year":2023,"claim":"Identified desuccinylation as a prerequisite for the AIF-CHCHD4 interaction and showed how a pathogenic dimerization defect converts AIF from respiratory support to a death trigger.","evidence":"SIRT5 IP-MS/Co-IP/KO with succinylation and ETC import assays; patient iPSC neurons with CRISPR isogenic correction showing impaired dimerization, calcium overload, and calpain-driven AIF nuclear translocation","pmids":["36653443","37365177"],"confidence":"High","gaps":["SIRT5 study single lab","Generality of the dimerization-to-death mechanism across variants untested"]},{"year":null,"claim":"How the multiple regulatory layers (transcriptional, redox, succinylation, ubiquitination, phosphorylation, and protein retention) are integrated to set the threshold between AIF's respiratory and lethal functions remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model reconciling PTM crosstalk","Catalytic basis of nuclear DNA degradation by the AIF/CypA/H2AX complex undefined","Physiological electron acceptor of mitochondrial AIF oxidoreductase not established"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0016491","term_label":"oxidoreductase activity","supporting_discovery_ids":[0,3,21,23]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[3,14,28]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[19,30]}],"localization":[{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[0,1,15,30]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,1,7,14]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[5,9]}],"pathway":[{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[0,5,14,16]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[6,26]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[19,30]},{"term_id":"R-HSA-1852241","term_label":"Organelle biogenesis and maintenance","supporting_discovery_ids":[6,19,30]}],"complexes":["AIFM1-CHCHD4/MIA40 disulfide relay","AIF-CypA-H2AX nuclear DNA-degrading complex"],"partners":["CHCHD4","CYPA (PPIA)","H2AX","HSP70","LONP1","PTEN","TXN","RIPK3"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O95831","full_name":"Apoptosis-inducing factor 1, mitochondrial","aliases":["Programmed cell death protein 8"],"length_aa":613,"mass_kda":66.9,"function":"Functions both as NADH oxidoreductase and as regulator of apoptosis (PubMed:17094969, PubMed:20362274, PubMed:23217327, PubMed:33168626). In response to apoptotic stimuli, it is released from the mitochondrion intermembrane space into the cytosol and to the nucleus, where it functions as a proapoptotic factor in a caspase-independent pathway (PubMed:20362274). Release into the cytoplasm is mediated upon binding to poly-ADP-ribose chains (By similarity). The soluble form (AIFsol) found in the nucleus induces 'parthanatos' i.e. caspase-independent fragmentation of chromosomal DNA (PubMed:20362274). Binds to DNA in a sequence-independent manner (PubMed:27178839). Interacts with EIF3G, and thereby inhibits the EIF3 machinery and protein synthesis, and activates caspase-7 to amplify apoptosis (PubMed:17094969). Plays a critical role in caspase-independent, pyknotic cell death in hydrogen peroxide-exposed cells (PubMed:19418225). In contrast, participates in normal mitochondrial metabolism. Plays an important role in the regulation of respiratory chain biogenesis by interacting with CHCHD4 and controlling CHCHD4 mitochondrial import (PubMed:26004228) Has NADH oxidoreductase activity. Does not induce nuclear apoptosis Pro-apoptotic isoform","subcellular_location":"Cytoplasm","url":"https://www.uniprot.org/uniprotkb/O95831/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/AIFM1","classification":"Not Classified","n_dependent_lines":626,"n_total_lines":1208,"dependency_fraction":0.5182119205298014},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"HEATR3","stoichiometry":0.2},{"gene":"PHGDH","stoichiometry":0.2},{"gene":"RTN4","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/AIFM1","total_profiled":1310},"omim":[{"mim_id":"618623","title":"HIG1 HYPOXIA-INDUCIBLE DOMAIN FAMILY, MEMBER 1A; HIGD1A","url":"https://www.omim.org/entry/618623"},{"mim_id":"617298","title":"APOPTOSIS-INDUCING FACTOR, MITOCHONDRIA-ASSOCIATED, 3; AIFM3","url":"https://www.omim.org/entry/617298"},{"mim_id":"614587","title":"CHAC GLUTATHIONE-SPECIFIC GAMMA-GLUTAMYLCYCLOTRANSFERASE 1; CHAC1","url":"https://www.omim.org/entry/614587"},{"mim_id":"612620","title":"RAS ASSOCIATION DOMAIN FAMILY, MEMBER 6; RASSF6","url":"https://www.omim.org/entry/612620"},{"mim_id":"612137","title":"RING FINGER PROTEIN 146; RNF146","url":"https://www.omim.org/entry/612137"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Mitochondria","reliability":"Supported"},{"location":"Connecting piece","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/AIFM1"},"hgnc":{"alias_symbol":["AIF","CMTX4","DFNX5"],"prev_symbol":["PDCD8","NAMSD","AUNX1"]},"alphafold":{"accession":"O95831","domains":[{"cath_id":"3.50.50.60","chopping":"132-170_212-262_404-471","consensus_level":"high","plddt":98.5027,"start":132,"end":471},{"cath_id":"3.50.50.60","chopping":"266-400","consensus_level":"high","plddt":98.1305,"start":266,"end":400},{"cath_id":"3.30.390.30","chopping":"482-608","consensus_level":"high","plddt":92.7354,"start":482,"end":608}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O95831","model_url":"https://alphafold.ebi.ac.uk/files/AF-O95831-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O95831-F1-predicted_aligned_error_v6.png","plddt_mean":85.81},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=AIFM1","jax_strain_url":"https://www.jax.org/strain/search?query=AIFM1"},"sequence":{"accession":"O95831","fasta_url":"https://rest.uniprot.org/uniprotkb/O95831.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O95831/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O95831"}},"corpus_meta":[{"pmid":"18762024","id":"PMC_18762024","title":"Glutathione 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The protein contains an oxidoreductase domain with conserved FAD and NAD binding residues.\",\n      \"method\": \"Subcellular fractionation, nuclear microinjection, cDNA cloning, domain analysis\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — original characterization replicated across multiple subsequent studies; multiple orthogonal methods including nuclear microinjection and fractionation\",\n      \"pmids\": [\"10381654\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"AIF is a ubiquitously expressed X-linked gene product imported into the mitochondrial intermembrane space as a FAD-containing flavoprotein; upon apoptotic stimuli it translocates through the outer mitochondrial membrane to the cytosol and nucleus, inducing chromatin condensation and ~50 kb DNA fragmentation in a caspase-independent manner.\",\n      \"method\": \"Subcellular fractionation, immunofluorescence, microinjection into purified nuclei, Western blot\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods, consistent with independent replication across labs\",\n      \"pmids\": [\"10913597\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"AIF exhibits NADH oxidase activity and can participate in regulation of apoptotic mitochondrial membrane permeabilization in addition to its nuclear apoptogenic function. HSP70 neutralizes AIF in a reaction independent of ATP and the HSP70 ATP-binding domain, inhibiting caspase-independent cell death.\",\n      \"method\": \"Co-immunoprecipitation, microinjection of anti-AIF antibody, AIF gene knockout, HSP70 overexpression\",\n      \"journal\": \"Biochimie\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP and knockout experiments, single review article compiling multiple experimental approaches\",\n      \"pmids\": [\"12022952\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Crystal structures of human and mouse AIF were determined; mutations that abolish the AIF-DNA electrostatic interaction suppress AIF-induced chromatin condensation but have no effect on NADH oxidase activity, demonstrating that the apoptogenic and oxidoreductase functions of AIF are dissociable.\",\n      \"method\": \"Crystal structure determination, active-site mutagenesis, nuclear condensation assay\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structure plus functional mutagenesis dissociating two activities\",\n      \"pmids\": [\"12432061\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"In C. elegans, the AIF homolog WAH-1 localizes to mitochondria and is released into the cytosol and nucleus in a CED-3 (caspase)-dependent manner downstream of the BH3-domain protein EGL-1. WAH-1 associates and cooperates with CPS-6/endonuclease G to promote apoptotic DNA degradation, defining a conserved mitochondria-initiated DNA degradation pathway.\",\n      \"method\": \"RNAi knockdown, subcellular localization, co-immunoprecipitation, DNA degradation assay\",\n      \"journal\": \"Science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — reconstitution of cooperation with EndoG in vitro, genetic epistasis in C. elegans with multiple orthogonal methods\",\n      \"pmids\": [\"12446902\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Pro-apoptotic Bcl-2 proteins (Bax/Bak) cause release of cytochrome c, Smac/DIABLO, and HtrA2/Omi but NOT AIF or EndoG from mitochondria; release of AIF and EndoG requires caspase activation downstream of Bax/Bak permeabilization, demonstrating a hierarchical ordering of mitochondrial apoptogenic factor release.\",\n      \"method\": \"Isolated mitochondria assay, caspase inhibitor (zVAD-fmk), Apaf-1 knockout cells, Western blot of subcellular fractions\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — reconstituted with isolated mitochondria and confirmed in cells with genetic and pharmacological tools\",\n      \"pmids\": [\"12941691\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Human and mouse cells lacking AIF via homologous recombination or siRNA show high lactate production, enhanced glycolysis, and severe reduction of respiratory chain complex I activity. AIF-deficient cells have reduced complex I content and subunit levels, pointing to a role of AIF in biogenesis/maintenance of complex I. Harlequin mice with reduced AIF also show reduced OXPHOS in retina and brain with reduced complex I subunits.\",\n      \"method\": \"Homologous recombination KO, siRNA, metabolic flux measurements, BN-PAGE, Western blot of complex I subunits\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple orthogonal approaches (KO + siRNA + Harlequin mouse model + biochemical complex I measurements)\",\n      \"pmids\": [\"15526035\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Cyclophilin A (CypA) directly interacts with AIF as determined by mass spectrometry, co-immunoprecipitation, and pull-down assays. AIF and CypA co-localize in the nucleus during early caspase-independent chromatin condensation and synergize in vitro to degrade plasmid DNA and induce DNA loss in purified nuclei. AIF mutants lacking the CypA-binding domain are inefficient apoptosis sensitizers.\",\n      \"method\": \"Mass spectrometry, co-immunoprecipitation, pull-down assay, in vitro DNA degradation, CypA knockout cells, mutagenesis\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple orthogonal binding methods plus functional validation in CypA-KO cells and domain mutagenesis\",\n      \"pmids\": [\"14716299\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"The yeast AIF homolog Ynr074cp (renamed Aif1p) localizes to mitochondria and translocates to the nucleus in response to apoptotic stimuli. Purified Ynr074cp degrades yeast nuclei and plasmid DNA. YNR074C disruption rescues yeast from oxygen stress and delays age-induced apoptosis; its pro-death effect is attenuated by disruption of cyclophilin A or the yeast caspase YCA1.\",\n      \"method\": \"Gene disruption, overexpression, subcellular localization, in vitro DNA degradation assay, genetic epistasis\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — reconstituted DNA degradation activity plus genetic epistasis in yeast\",\n      \"pmids\": [\"15381687\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Hsp70 binds directly to AIF (shown by co-immunoprecipitation) and sequesters it in the cytosol, preventing nuclear translocation of AIF and reducing neonatal hypoxic/ischemic brain injury. Hsp70 overexpression reduced nuclear AIF without affecting cytosolic AIF levels.\",\n      \"method\": \"Co-immunoprecipitation, Western blot of subcellular fractions, transgenic mouse model of hypoxia-ischemia\",\n      \"journal\": \"Journal of cerebral blood flow and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus in vivo transgenic model, single lab\",\n      \"pmids\": [\"15244251\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"BimEL upregulation by MPP+ leads to increased calpain I activity, which directly mediates AIF release from isolated mitochondria. Calpain inhibition or BimEL knockdown reduces AIF release and cell death. Under cell-free conditions, activated purified calpain I releases AIF from isolated mitochondria independently of BimEL or JNK.\",\n      \"method\": \"Cell-free mitochondrial release assay with purified calpain I, siRNA knockdown of BimEL, calpain inhibitors, Western blot\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — cell-free reconstitution of calpain-mediated AIF release plus siRNA confirmation\",\n      \"pmids\": [\"15941767\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"AIF gene expression is positively regulated by p53 at basal levels via a p53 responsive element in the AIF gene promoter that is bound by p53 within cells. p53-driven large-scale DNA fragmentation (an AIF activity hallmark) is compromised in cells lacking functional p53. Caspase-independent death is also impaired in p53-deficient cells.\",\n      \"method\": \"Chromatin immunoprecipitation, luciferase reporter assay, p53-deficient cells, large-scale DNA fragmentation assay\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP plus reporter assay plus functional readout, single lab\",\n      \"pmids\": [\"16729031\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"GPx4 inactivation triggers 12/15-lipoxygenase-derived lipid peroxidation as a specific downstream event that triggers AIF-mediated cell death. siRNA-mediated AIF silencing entirely prevents cell death in this pathway. Neuron-specific GPx4 depletion causes neurodegeneration via this pathway.\",\n      \"method\": \"Inducible GPx4 knockout in mice and cells, siRNA silencing of AIF, 12/15-lipoxygenase inhibitors, alpha-tocopherol rescue\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple genetic and pharmacological tools across cell and mouse models confirming AIF's epistatic position\",\n      \"pmids\": [\"18762024\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Poly(ADP-ribose) (PAR) polymer generated in the nucleus by PARP-1 after DNA damage translocates to mitochondria to mediate AIF release; this PAR signal is the key event initiating nuclear-to-mitochondrial crosstalk in parthanatos (PARP-1-dependent caspase-independent cell death).\",\n      \"method\": \"Review summarizing experimental evidence including PAR polymer localization, AIF release assays, and PARP-1 genetic/pharmacological manipulation\",\n      \"journal\": \"Experimental neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mechanistic model supported by cited experimental evidence but this paper is a review; underlying experiments established elsewhere\",\n      \"pmids\": [\"19332058\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"AIF associates with histone H2AX in the nucleus through its C-terminal proline-rich binding domain (PBD, residues 543–559), generating an active DNA-degrading complex with cyclophilin A (CypA). Deletion or mutagenesis of the AIF C-terminal PBD abolishes AIF/H2AX interaction and AIF-mediated chromatinolysis. H2AX genetic ablation or CypA downregulation confers resistance to programmed necrosis.\",\n      \"method\": \"Co-immunoprecipitation, directed mutagenesis, H2AX knockout cells, siRNA knockdown of CypA, MNNG-induced necrosis assay\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — mutagenesis of AIF binding domain, genetic KO of H2AX, and pharmacological/siRNA validation all in one study\",\n      \"pmids\": [\"20360685\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"AIF is N-terminally anchored to the inner mitochondrial membrane rather than being freely soluble in the intermembrane space; it must be proteolytically cleaved from its membrane anchor prior to release into the cytosol.\",\n      \"method\": \"Membrane fractionation, protease protection assay, reviewed experimental evidence\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — review article summarizing experimental fractionation data, mechanism of membrane anchorage and cleavage requirement established\",\n      \"pmids\": [\"20494118\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"In MNNG-induced necroptosis, BID acts as a link between calpain activation and BAX activation upstream of AIF release. Calpains directly process BID into tBID; calpain non-cleavable BID mutants (BID-G70A or BID-Δ68-71) abolish BAX activation and necroptosis. BID genetic ablation blocks both BAX activation and AIF-mediated necroptosis.\",\n      \"method\": \"Knockout MEFs, BID reintroduction rescue, calpain cleavage assay, BID point mutants, Western blot, cell death assays\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — genetic KO rescue experiments plus biochemical cleavage assays establishing sequential pathway\",\n      \"pmids\": [\"21738214\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"AIF is imported into mitochondria via the endoplasmic reticulum through mitochondria-associated membranes (MAM) and transport vesicles. DRP1, ATAD3A, and mitofusin-2 are required for this import pathway; knockdown of DRP1 increased AIF in MAM while reducing it in mitochondria; knockdown of ATAD3A or Mfn-2 increased cytosolic AIF transport vesicles.\",\n      \"method\": \"Sucrose gradient ultracentrifugation, immunoblotting, DRP1/ATAD3A/Mfn-2 siRNA knockdown\",\n      \"journal\": \"International journal of molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — single lab, biochemical fractionation with siRNA knockdowns, novel pathway claim with limited orthogonal validation\",\n      \"pmids\": [\"22134679\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"ATM and DNA-PK kinases phosphorylate histone H2AX at Ser139 (generating γH2AX) in a synergistic manner during MNNG-induced necroptosis. γH2AX is required for AIF-mediated chromatinolysis; H2AX S139A mutation or H2AX knockout abolishes both chromatinolysis and necroptosis, whereas phosphomimetic H2AX-S139E restores sensitivity.\",\n      \"method\": \"ATM/DNA-PK pharmacological inhibitors, H2AX knockout cells, H2AX point mutant rescue, siRNA\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple genetic and pharmacological tools; phosphomimetic rescue provides causal evidence\",\n      \"pmids\": [\"22972376\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"AIF directly interacts with CHCHD4 (human MIA40), the central component of the mitochondrial intermembrane space import machinery. AIF depletion or hypomorphic mutation reduces CHCHD4 protein levels by diminishing its mitochondrial import. CHCHD4 depletion alone recapitulates the respiratory defect of AIF-deficient cells. Restoring CHCHD4 mitochondrial localization independently of AIF rescues respiratory function and enables cavitation in AIF-deficient embryoid bodies.\",\n      \"method\": \"Co-immunoprecipitation, siRNA, CHCHD4 mitochondrial targeting construct rescue, respiratory chain activity assay, AIF-KO embryoid bodies\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — mechanistic rescue experiment plus Co-IP plus functional respiratory assays in multiple model systems\",\n      \"pmids\": [\"26004228\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"AIF physically interacts with and protects PTEN from oxidation-mediated inactivation. AIF knockdown causes oxidative inactivation of PTEN's lipid phosphatase activity, leading to Akt activation, GSK-3β phosphorylation, β-catenin activation, and ultimately EMT and tumor metastasis. PTEN was also identified as a mitochondrial protein.\",\n      \"method\": \"Co-immunoprecipitation, lipid phosphatase activity assay, AIF knockdown, oxidation assay, xenograft model\",\n      \"journal\": \"EMBO reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP plus enzymatic assay plus cell-based and in vivo validation, single lab\",\n      \"pmids\": [\"26415504\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Reconstituted AIF and AMID, when inserted into bacterial or mitochondrial membranes, function as NADH:ubiquinone oxidoreductases (NDH-2) sensitive to rotenone and the quinone-binding inhibitor HQNO, and support NADH-linked proton pumping. N-terminally tagged AIF enhances growth of E. coli lacking complex I and NDH-2; NADH-binding site mutants and disease mutant AIFΔR201 show decreased activity.\",\n      \"method\": \"Membrane reconstitution, NADH:ubiquinone oxidoreductase activity assay, proton pumping assay, E. coli growth complementation, mutagenesis\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution plus mutagenesis plus bacterial complementation, single lab\",\n      \"pmids\": [\"26063804\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Cytosolic/nuclear thioredoxin-1 (Trx1) directly interacts with AIF under physiological conditions via its active-site cysteines; this interaction is disrupted by oxidative stress. Nuclear Trx1 hinders AIF-DNA interaction, attenuating AIF-mediated DNA damage. Disruption of the Trx1-AIF interaction correlates with nuclear AIF translocation.\",\n      \"method\": \"Co-immunoprecipitation, Trx1 active-site mutants, oxidative stress perturbation, nuclear fractionation, DNA damage assay\",\n      \"journal\": \"Free radical biology & medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with mutagenesis and functional DNA damage readout, single lab\",\n      \"pmids\": [\"26119781\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Structural and functional characterization of four pathological AIFM1 variants (V243L, G262S, G308E, G338E): G308E drastically impairs redox properties and mitochondrial respiration; V243L and G338E show minimal structural changes, suggesting reduced cellular expression is the pathogenic driver; G262S shows structural/redox alterations more severe than predicted by clinical phenotype.\",\n      \"method\": \"Protein purification, spectroscopic characterization, redox activity assay, cell respiration measurement, structural analysis\",\n      \"journal\": \"Journal of molecular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro biochemical reconstitution and structure-function analysis of multiple variants, single lab\",\n      \"pmids\": [\"27178839\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"The AIF(370–394) peptide binds CypA at a surface overlapping with the cyclosporin A binding site near the catalytic pocket; NMR and biochemical mapping established that AIF(Δ1–121) and the AIF(370–394) peptide bind the same CypA surface and compete with CsA.\",\n      \"method\": \"NMR spectroscopy, pull-down assay, molecular modeling, competition binding assay\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR structural mapping plus biochemical validation, single lab\",\n      \"pmids\": [\"28442737\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"High-risk HPV E6 oncoprotein (HPV16 E6) directly binds all three forms of AIF and induces proteasome-dependent reduction of AIF expression, thereby suppressing AIF-mediated caspase-independent apoptosis. Low-risk HPV6 E6 also binds AIF but does not reduce its levels.\",\n      \"method\": \"Co-immunoprecipitation, MG132 proteasome inhibitor, flow cytometry for chromatin degradation, AIF knockdown\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP plus proteasome inhibitor rescue plus functional apoptosis readout, single lab\",\n      \"pmids\": [\"32848167\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Deletion of AIF in a KrasG12D-driven mouse lung cancer model causes OXPHOS deficiency and metabolic shift toward glycolysis, reducing tumor growth. Re-expression of wild-type or apoptosis-deficient AIF (intact mitochondrial function) both restored OXPHOS and reduced animal survival, demonstrating that AIF's mitochondrial respiratory function (not its apoptotic function) drives lung cancer progression.\",\n      \"method\": \"Conditional AIF KO mouse in KrasG12D model, re-expression of WT vs. apoptosis-mutant AIF, Seahorse metabolic profiling\",\n      \"journal\": \"Cell research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic rescue experiment dissociating apoptotic from metabolic AIF functions, multiple experimental approaches\",\n      \"pmids\": [\"31133695\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"CAPN1 (calpain-1) is activated by calcium overload, associates with mitochondria, and cleaves mitochondrion-bound AIF; cleaved AIF translocates to the nucleus to trigger large-scale DNA fragmentation and necrotic cell death in cardiomyocytes. AIF oxidation at cysteine residues by a depleted thioredoxin-2 system potentiates this effect. A cyclophilin A (PPIA)-binding AIF peptide blocks PPIA-mediated AIF nuclear translocation.\",\n      \"method\": \"Calpain-1 inhibitor, CAST overexpression, AIF-mimetic peptide, mouse model of arrhythmogenic cardiomyopathy, ES cell-derived cardiomyocytes, immunoprecipitation\",\n      \"journal\": \"Science translational medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — multiple genetic and pharmacological interventions in mouse and cell models; mechanistic chain from Ca2+ → CAPN1 → AIF cleavage → nuclear translocation established\",\n      \"pmids\": [\"33597260\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"OTUD1 deubiquitinase deubiquitinates AIF at K244, disrupting mitochondrial structure and compromising OXPHOS, and at K255, enhancing AIF DNA-binding ability to promote parthanatos. OTUD1 thus controls both the mitochondrial survival and nuclear apoptogenic functions of AIF through distinct ubiquitination sites.\",\n      \"method\": \"Deubiquitination assay, specific ubiquitination site mutagenesis (K244, K255), OXPHOS measurement, DNA-binding assay, cell death assay\",\n      \"journal\": \"Advanced science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — site-specific mutagenesis plus functional assays, single lab\",\n      \"pmids\": [\"33898171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"PAK5 phosphorylates AIF at Thr281, inhibiting formation of the AIF/importin α3 complex and thereby preventing AIF nuclear translocation. PAK5 also decreases mitochondrial membrane permeability to reduce AIF release from mitochondria.\",\n      \"method\": \"Phosphorylation assay, AIF Thr281 mutagenesis, co-immunoprecipitation with importin α3, mitochondrial membrane permeability measurement, in vivo breast cancer model\",\n      \"journal\": \"International journal of biological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — site-specific phosphorylation plus Co-IP showing disrupted importin α3 interaction, single lab\",\n      \"pmids\": [\"33867848\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"AIFM1 forms a stable long-lived complex with MIA40/CHCHD4 in vitro and in cells/tissues. In AIFM1-KO HEK293 cells, MIA40 is present in monomeric form and cannot efficiently interact with or import specific substrates, particularly NDUFS5. Loss of mitochondrial NDUFS5 causes its cytosolic proteasomal degradation and stalls complex I assembly. AIFM1 thus serves dual overlapping functions: importing MIA40 and constituting an integral part of the disulfide relay.\",\n      \"method\": \"In vitro complex reconstitution, AIFM1 KO cell lines, MIA40 substrate import assay, NDUFS5 localization, complex I assembly analysis, BN-PAGE\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — in vitro reconstitution plus genetic KO with multiple biochemical readouts establishing mechanism\",\n      \"pmids\": [\"35859387\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"SIRT5-mediated desuccinylation of AIFM1 is required for the AIFM1-CHCHD4 interaction; reduced SIRT5 increases AIFM1 succinylation, abolishing the AIFM1-CHCHD4 interaction and reducing ETC complex subunit import, leading to mitochondrial dysfunction. IP-MS and Co-IP confirmed AIFM1 as a direct SIRT5 substrate.\",\n      \"method\": \"Immunoprecipitation-mass spectrometry (IP-MS), co-immunoprecipitation, SIRT5 overexpression/KO, succinylation assay, ETC complex subunit measurement\",\n      \"journal\": \"Experimental & molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — IP-MS plus Co-IP plus SIRT5 KO phenotype, single lab\",\n      \"pmids\": [\"36653443\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"An AIFM1 variant (c.1265 G>A) causes a splicing change resulting in impaired AIF dimerization, which weakens AIF-CHCHD4 interaction, inhibits mitochondrial import of ETC complex subunits, impairs MICU1-MICU2 heterodimerization leading to mitochondrial calcium overload, and activates calpain-mediated AIF cleavage and nuclear translocation triggering caspase-independent apoptosis in patient iPSC-derived neurons.\",\n      \"method\": \"Patient iPSC-derived neurons, CRISPR/Cas9 isogenic correction, Co-IP for AIF-CHCHD4 interaction, ETC subunit import assay, mitochondrial Ca2+ measurement, calpain activity assay\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — isogenic CRISPR correction plus multiple orthogonal mechanistic assays in patient-derived neurons\",\n      \"pmids\": [\"37365177\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"LONP1 directly interacts with AIFM1 in mitochondria; LONP1 ablation leads to AIFM1 translocation from cytoplasm to nucleus causing oocyte apoptosis and progressive oocyte death.\",\n      \"method\": \"Co-immunoprecipitation/LC-MS, conditional Lonp1 knockout mice, AIFM1 nuclear translocation by immunofluorescence\",\n      \"journal\": \"EBioMedicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP/MS plus in vivo KO phenotype with nuclear translocation readout, single lab\",\n      \"pmids\": [\"34974310\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"RIP3 forms a complex with AIF in the nucleus following ischemia/reperfusion injury; their interaction was detected by co-immunoprecipitation and co-localization, and formation of this RIP3-AIF nuclear complex is critical for ischemic neuronal DNA degradation and programmed necrosis. The necrostatin-1 RIP3 inhibitor prevents both complex formation and nuclear translocation.\",\n      \"method\": \"Immunoprecipitation, immunofluorescence co-localization, necrostatin-1 inhibitor, Western blot of nuclear fractions, rat global cerebral ischemia model\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP plus in vivo pharmacological inhibition, single lab\",\n      \"pmids\": [\"27377128\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"AIF ubiquitination by interaction with UBA52 under hypoxia leads to mitochondrial dysfunction (impaired OXPHOS, increased glycolysis and ROS) via loss of complex I activity. AIF deficiency also triggers abnormal mitophagy through AIF-UBA52 interaction. AAV-mediated AIF overexpression protects against hypoxia-induced pulmonary vascular remodeling.\",\n      \"method\": \"Co-IP with mass spectrometry, Seahorse extracellular flux analysis, AAV overexpression, electron microscopy\",\n      \"journal\": \"Cell & bioscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP/MS plus functional metabolic assays plus in vivo rescue, single lab\",\n      \"pmids\": [\"35090552\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"AIFM1/AIF is a mitochondrial inner membrane-anchored FAD-dependent NADH oxidoreductase that, under normal conditions, supports respiratory chain complex I biogenesis and OXPHOS by acting as an integral component of the MIA40/CHCHD4-dependent disulfide relay responsible for importing nuclear-encoded complex I subunits (e.g., NDUFS5); upon apoptotic or necrotic stimuli, AIF is proteolytically cleaved from its membrane anchor (a step facilitated by calpains), released into the cytosol, and imported into the nucleus via importin α3, where—through its C-terminal proline-rich domain—it assembles a DNA-degrading complex with histone H2AX (phosphorylated at Ser139 by ATM and DNA-PK) and cyclophilin A (CypA) to drive large-scale DNA fragmentation and caspase-independent chromatinolysis; AIF nuclear translocation and activity are regulated by post-translational modifications including SIRT5-mediated desuccinylation (required for CHCHD4 interaction), PAK5-mediated Thr281 phosphorylation (inhibiting importin α3 binding), OTUD1-mediated deubiquitination at K244/K255, and redox modulation by thioredoxin-1; upstream, PAR polymer generated by PARP-1, calpain activation (downstream of BID/tBID), and BAX are key pathway nodes, while HSP70 and LONP1 act as retention factors that suppress AIF nuclear translocation.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"AIFM1 (AIF) is a FAD-dependent NADH oxidoreductase of the mitochondrial intermembrane space that performs two genetically separable functions: support of mitochondrial respiration under normal conditions and execution of caspase-independent cell death upon apoptotic or necrotic stress [#0, #3, #6]. In its housekeeping role, AIF is N-terminally anchored to the inner mitochondrial membrane and acts as an integral component of the MIA40/CHCHD4 disulfide-relay import machinery: it both imports MIA40/CHCHD4 and stabilizes the relay, enabling mitochondrial import of nuclear-encoded respiratory subunits such as NDUFS5 and thereby driving complex I biogenesis and OXPHOS [#15, #19, #30]. Loss of AIF collapses complex I content and forces a glycolytic shift [#6], and this respiratory function—independent of its apoptotic activity—is sufficient to drive Kras-driven lung tumor progression [#26]. The AIF–CHCHD4 interaction is gated by post-translational modification, requiring SIRT5-mediated desuccinylation and proper AIF dimerization [#31, #32]. Crystallographic and reconstitution work shows the apoptogenic and oxidoreductase activities are dissociable, with AIF functioning in membranes as a rotenone-sensitive NADH:ubiquinone oxidoreductase [#3, #21]. In the death program, AIF must be proteolytically released from its membrane anchor—a step executed by calpains downstream of calcium overload and BID/tBID-mediated BAX activation [#10, #15, #16, #27]—after which it translocates to the nucleus and assembles a DNA-degrading complex with cyclophilin A and γH2AX via its C-terminal proline-rich domain to drive large-scale chromatinolysis [#7, #14, #18]. This pathway is held in check by retention and modification factors including HSP70 and LONP1, redox modulation by thioredoxin-1, and regulatory PTMs (OTUD1 deubiquitination, PAK5 phosphorylation blocking importin-α3 binding) [#9, #22, #28, #29, #33]. Pathogenic AIFM1 variants impair redox properties, dimerization, and CHCHD4 binding, causing mitochondrial respiratory deficiency [#23, #32].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Established AIF as the founding mitochondrial effector of caspase-independent death, answering whether mitochondria harbor an apoptogenic factor distinct from cytochrome c.\",\n      \"evidence\": \"Subcellular fractionation, nuclear microinjection, and cDNA cloning identifying an IMS flavoprotein that translocates to the nucleus to drive chromatin condensation and ~50 kb DNA fragmentation\",\n      \"pmids\": [\"10381654\", \"10913597\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not identify the nuclear DNA-degrading partners\", \"Mechanism of release from mitochondria unresolved\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Demonstrated that AIF's oxidoreductase and apoptogenic activities are structurally and functionally separable, reframing AIF as a bifunctional protein rather than a single-activity death factor.\",\n      \"evidence\": \"Crystal structures of human/mouse AIF with active-site mutagenesis dissociating DNA-binding-dependent chromatin condensation from NADH oxidase activity; HSP70 neutralization by Co-IP/KO\",\n      \"pmids\": [\"12432061\", \"12022952\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological substrate of the oxidoreductase activity not defined\", \"How DNA binding triggers chromatinolysis unclear\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Showed the death pathway is evolutionarily conserved, establishing AIF homologs as components of a mitochondria-initiated DNA degradation program acting with endonuclease G.\",\n      \"evidence\": \"RNAi, localization, Co-IP, and DNA degradation assays in C. elegans (WAH-1) defining caspase-dependent release and cooperation with CPS-6/EndoG\",\n      \"pmids\": [\"12446902\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Conservation of the EndoG cooperation in mammals not addressed here\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Ordered the mitochondrial apoptogenic release hierarchy, showing AIF release is downstream of and dependent on caspase activation rather than concurrent with cytochrome c.\",\n      \"evidence\": \"Isolated mitochondria assays, zVAD-fmk, and Apaf-1 KO cells distinguishing Bax/Bak-driven release of cytochrome c from caspase-dependent AIF/EndoG release\",\n      \"pmids\": [\"12941691\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Protease(s) directly cleaving membrane-anchored AIF not identified here\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Revealed an unexpected housekeeping role for AIF in respiratory chain complex I biogenesis, separating its survival function from its death function.\",\n      \"evidence\": \"Homologous-recombination KO, siRNA, BN-PAGE, metabolic flux, and Harlequin mouse analysis showing reduced complex I content and enhanced glycolysis on AIF loss\",\n      \"pmids\": [\"15526035\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular mechanism linking AIF to complex I assembly not yet defined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Identified the nuclear partners that convert AIF into an active nuclease complex, beginning to explain how AIF—lacking intrinsic nuclease activity—degrades DNA.\",\n      \"evidence\": \"Mass spectrometry, Co-IP, pull-downs, CypA-KO cells, and mutagenesis showing direct AIF-CypA interaction and synergistic DNA degradation; yeast Aif1p reconstitution and genetic epistasis with cyclophilin/YCA1\",\n      \"pmids\": [\"14716299\", \"15381687\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether CypA is the catalytic nuclease vs. a cofactor unresolved\", \"Additional complex members not yet defined\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Defined upstream release and retention controls, showing calpain directly liberates AIF from mitochondria while HSP70 sequesters it cytosolically.\",\n      \"evidence\": \"Cell-free mitochondrial release with purified calpain I, BimEL siRNA, calpain inhibitors; HSP70 Co-IP and transgenic hypoxia-ischemia mouse model\",\n      \"pmids\": [\"15941767\", \"15244251\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Exact AIF cleavage site by calpain not mapped here\", \"HSP70 study single lab\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Placed AIF under transcriptional control of p53, linking the DNA-damage response to AIF abundance and caspase-independent death.\",\n      \"evidence\": \"ChIP, luciferase reporter, and p53-deficient cells with large-scale DNA fragmentation readout\",\n      \"pmids\": [\"16729031\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab\", \"Contribution relative to post-translational regulation unclear\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Positioned AIF as the obligatory executioner downstream of lipid peroxidation in a GPx4-controlled cell death pathway.\",\n      \"evidence\": \"Inducible GPx4 KO in mice/cells, AIF siRNA, 12/15-lipoxygenase inhibitors, and alpha-tocopherol rescue establishing AIF's epistatic position\",\n      \"pmids\": [\"18762024\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How lipid peroxidation signals to AIF release not mechanistically defined\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Identified PAR polymer as the nucleus-to-mitochondria signal initiating AIF release in PARP-1-dependent parthanatos.\",\n      \"evidence\": \"Review compiling PAR localization, AIF release assays, and PARP-1 genetic/pharmacological manipulation\",\n      \"pmids\": [\"19332058\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Review-level synthesis\", \"Direct PAR-AIF binding mechanism not established here\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Resolved the molecular architecture of the lethal nuclear complex, mapping AIF's C-terminal proline-rich domain as the H2AX-binding interface required for chromatinolysis.\",\n      \"evidence\": \"Co-IP, directed mutagenesis of AIF PBD (residues 543-559), H2AX-KO cells, CypA siRNA, and MNNG necrosis assays; membrane-anchorage fractionation defining the cleavage requirement\",\n      \"pmids\": [\"20360685\", \"20494118\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Stoichiometry and catalytic mechanism of the AIF/H2AX/CypA complex unresolved\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Wired the proximal necroptotic cascade upstream of AIF, showing calpain-processed tBID activates BAX to permit AIF release.\",\n      \"evidence\": \"KO MEFs with BID rescue, calpain cleavage assays, and BID point mutants (G70A, Δ68-71) in MNNG necroptosis\",\n      \"pmids\": [\"21738214\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct biochemical link between BAX activation and calpain-mediated AIF cleavage not fully reconstituted\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Proposed a non-canonical ER/MAM-vesicular route for AIF mitochondrial import requiring fission and tethering machinery.\",\n      \"evidence\": \"Sucrose-gradient fractionation and DRP1/ATAD3A/Mfn-2 siRNA knockdowns\",\n      \"pmids\": [\"22134679\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab with limited orthogonal validation\", \"Reconciliation with canonical IMS import not addressed\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Established the upstream kinase signal licensing chromatinolysis, showing ATM/DNA-PK-generated γH2AX is required for AIF-mediated DNA degradation.\",\n      \"evidence\": \"ATM/DNA-PK inhibitors, H2AX-KO cells, S139A loss-of-function and S139E phosphomimetic rescue in MNNG necroptosis\",\n      \"pmids\": [\"22972376\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How γH2AX promotes AIF complex assembly mechanistically unclear\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Defined the mechanism of AIF's respiratory function, showing AIF imports and stabilizes CHCHD4/MIA40 to power the IMS disulfide relay.\",\n      \"evidence\": \"Co-IP, siRNA, CHCHD4 mitochondrial-targeting rescue, respiratory assays, and AIF-KO embryoid bodies; membrane-reconstituted NDH-2 activity and E. coli complementation\",\n      \"pmids\": [\"26004228\", \"26063804\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full set of relay substrates not enumerated here\", \"Relationship between NDH-2 quinone activity and import role unclear\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Uncovered redox and signaling roles beyond respiration, including AIF-mediated protection of PTEN from oxidation and Trx1 restraint of nuclear AIF.\",\n      \"evidence\": \"Co-IP, lipid phosphatase and oxidation assays, xenografts (PTEN); Trx1 active-site mutants, fractionation, and DNA damage assays\",\n      \"pmids\": [\"26415504\", \"26119781\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Both single-lab\", \"Direct redox chemistry between AIF and partners not fully defined\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Linked AIFM1 missense variants to mitochondrial disease through distinct molecular defects in redox properties or protein stability.\",\n      \"evidence\": \"Purification, spectroscopy, redox and respiration assays, and structural analysis of V243L, G262S, G308E, G338E variants\",\n      \"pmids\": [\"27178839\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genotype-phenotype correlation imperfect (G262S more severe biochemically than clinically)\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Added RIP3 as a nuclear AIF partner in ischemic programmed necrosis.\",\n      \"evidence\": \"Co-IP, co-localization, necrostatin-1 inhibition, and nuclear fractionation in a rat cerebral ischemia model\",\n      \"pmids\": [\"27377128\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab\", \"Functional consequence of RIP3-AIF binding for DNA degradation not mechanistically dissected\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Mapped the AIF-CypA interface at atomic resolution and showed it overlaps the cyclosporin A site, enabling pharmacological targeting.\",\n      \"evidence\": \"NMR spectroscopy, pull-downs, modeling, and CsA competition binding of AIF peptides\",\n      \"pmids\": [\"28442737\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether competing the interface blocks chromatinolysis in vivo not tested here\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Demonstrated that AIF's mitochondrial respiratory function, not its apoptotic activity, drives tumor progression in vivo.\",\n      \"evidence\": \"Conditional AIF KO in KrasG12D mouse lung cancer with WT vs. apoptosis-mutant AIF re-expression and Seahorse profiling\",\n      \"pmids\": [\"31133695\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Therapeutic exploitability of AIF respiratory dependence untested here\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Defined a coherent calcium → calpain → AIF cleavage → nuclear translocation axis in cardiomyocyte necrosis, integrating redox potentiation and CypA-dependent import.\",\n      \"evidence\": \"Calpain-1 inhibition, CAST overexpression, AIF-mimetic peptide, and arrhythmogenic cardiomyopathy mouse/cardiomyocyte models\",\n      \"pmids\": [\"33597260\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Precise calpain cleavage site and thioredoxin-2 redox target residues not fully mapped\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Established PTM control of AIF's dual functions and identified retention factors, with OTUD1 and PAK5 acting at distinct steps and LONP1 restraining nuclear translocation.\",\n      \"evidence\": \"Site-specific K244/K255 deubiquitination assays (OTUD1); Thr281 phosphorylation and importin-α3 Co-IP (PAK5); LONP1 Co-IP/MS and conditional KO oocyte model\",\n      \"pmids\": [\"33898171\", \"33867848\", \"34974310\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"All single-lab\", \"Crosstalk and hierarchy among these PTMs unresolved\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Consolidated the AIFM1–MIA40 relay mechanism, showing AIFM1 loss leaves MIA40 monomeric and stalls complex I via failed NDUFS5 import and its cytosolic degradation.\",\n      \"evidence\": \"In vitro complex reconstitution, AIFM1-KO HEK293 cells, MIA40 substrate import assays, NDUFS5 localization, and BN-PAGE; UBA52-AIF ubiquitination linked to hypoxic mitochondrial dysfunction\",\n      \"pmids\": [\"35859387\", \"35090552\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Breadth of relay substrates beyond NDUFS5 incompletely defined\", \"UBA52 study single lab\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified desuccinylation as a prerequisite for the AIF-CHCHD4 interaction and showed how a pathogenic dimerization defect converts AIF from respiratory support to a death trigger.\",\n      \"evidence\": \"SIRT5 IP-MS/Co-IP/KO with succinylation and ETC import assays; patient iPSC neurons with CRISPR isogenic correction showing impaired dimerization, calcium overload, and calpain-driven AIF nuclear translocation\",\n      \"pmids\": [\"36653443\", \"37365177\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"SIRT5 study single lab\", \"Generality of the dimerization-to-death mechanism across variants untested\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How the multiple regulatory layers (transcriptional, redox, succinylation, ubiquitination, phosphorylation, and protein retention) are integrated to set the threshold between AIF's respiratory and lethal functions remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model reconciling PTM crosstalk\", \"Catalytic basis of nuclear DNA degradation by the AIF/CypA/H2AX complex undefined\", \"Physiological electron acceptor of mitochondrial AIF oxidoreductase not established\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0016491\", \"supporting_discovery_ids\": [0, 3, 21, 23]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [3, 14, 28]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [19, 30]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [0, 1, 15, 30]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 1, 7, 14]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [5, 9]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [0, 5, 14, 16]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [6, 26]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [19, 30]},\n      {\"term_id\": \"R-HSA-1852241\", \"supporting_discovery_ids\": [6, 19, 30]}\n    ],\n    \"complexes\": [\n      \"AIFM1-CHCHD4/MIA40 disulfide relay\",\n      \"AIF-CypA-H2AX nuclear DNA-degrading complex\"\n    ],\n    \"partners\": [\n      \"CHCHD4\",\n      \"CypA (PPIA)\",\n      \"H2AX\",\n      \"HSP70\",\n      \"LONP1\",\n      \"PTEN\",\n      \"TXN\",\n      \"RIPK3\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":{"gene":"AIFM1","tier":"GROUNDING","verdict":"Evidence-grounding concern","subtype":"fabrication","uniprot_band":"rich","rules_fired":"R7","issue":"R7: fabricated (no corpus paper): 15244251"},"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}