{"gene":"FANCG","run_date":"2026-06-09T23:54:43","timeline":{"discoveries":[{"year":1998,"finding":"FANCG is identical to XRCC9, a gene that complements the MMC-sensitive Chinese hamster mutant UV40, implicating FANCG in DNA post-replication repair or cell cycle checkpoint control.","method":"Complementation of FA-G cell line; identification of pathogenic mutations in FA-G patients","journal":"Nature genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — complementation assay with mutation identification, replicated across multiple FA-G patients, foundational paper establishing gene identity","pmids":["9806548"],"is_preprint":false},{"year":1997,"finding":"XRCC9/FANCG partially corrects hypersensitivity of CHO UV40 cells to mitomycin C, cisplatin, ethyl methanesulfonate, UV, and gamma-radiation, and almost fully corrects spontaneous chromosomal aberrations, placing FANCG in a postreplication repair or cell cycle checkpoint function.","method":"Complementation assay; cDNA transfection into CHO UV40 cells; cytogenetic analysis","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — functional complementation with multiple genotoxic agents and cytogenetic readouts in the original cloning paper","pmids":["9256465"],"is_preprint":false},{"year":1999,"finding":"FANCG protein is required for binding of FANCA and FANCC proteins to each other, and is itself a component of a nuclear protein complex containing FANCA and FANCC; the amino-terminal region of FANCA is required for FANCG binding.","method":"Co-immunoprecipitation; nuclear fractionation; complementation assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal Co-IP with nuclear fractionation, complementation data, replicated by multiple groups","pmids":["10373536"],"is_preprint":false},{"year":1999,"finding":"FANCG localizes to both cytoplasm and nucleus, and forms a physical complex with FANCA both in vivo and in vitro; the FANCA/FANCG complex is absent in FA-A and FA-G cell lines but present in FA-D and FA-E cells, indicating group-specific assembly requirements.","method":"Co-immunoprecipitation in vivo and in vitro; nuclear/cytoplasmic fractionation; transfection and cell fusion correction experiments","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo and in vitro Co-IP across multiple FA complementation group cell lines, complemented by correction experiments","pmids":["10468606"],"is_preprint":false},{"year":1999,"finding":"The FANCA-FANCG interaction domain maps to amino acids 18-29 of FANCA (arginine-rich motif RRRAWAELLAG) and to two non-contiguous carboxy-terminal domains of FANCG (aa 400-475 and 585-622); mutations in this domain abolish complementation of MMC sensitivity, demonstrating that nuclear FANCA-FANCG complexes are required for cellular resistance to MMC.","method":"Site-directed mutagenesis; co-immunoprecipitation; NLS/NES targeting constructs; MMC sensitivity assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — mutagenesis with functional readout (MMC complementation) and localization experiments in single lab with multiple orthogonal methods","pmids":["10567393"],"is_preprint":false},{"year":2000,"finding":"FANCF forms a nuclear complex with FANCA, FANCC, and FANCG; each FA protein (except FANCD) is required for these complexes to form, as demonstrated by absence of interactions in the corresponding complementation group cell lines.","method":"Co-immunoprecipitation; nuclear fractionation in FA complementation group lymphoblasts","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal Co-IP across multiple FA complementation group cell lines, replicated across labs","pmids":["11063725"],"is_preprint":false},{"year":2000,"finding":"FANCG and FANCA stabilize each other: correction of FA-G cells with FANCG cDNA prolongs FANCA half-life and increases nuclear accumulation of the FA protein complex; reciprocally, FANCA correction increases FANCG half-life. FANCG binds the amino-terminal NLS of FANCA, and this binding is required for nuclear translocation of the complex.","method":"Retroviral complementation; pulse-chase protein stability assays; co-immunoprecipitation; nuclear fractionation","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Moderate — pulse-chase stability assays combined with Co-IP and nuclear fractionation, single lab with multiple orthogonal methods","pmids":["11050007"],"is_preprint":false},{"year":2000,"finding":"The amino-terminal two-thirds of FANCG (aa 1-428) binds to the FANCA NLS, but the carboxy terminus of FANCG is additionally required for binding FANCC and for functional complementation of FA-G cells; thus FANCG binding to FANCA is necessary but not sufficient for full FANCG activity.","method":"Yeast two-hybrid; co-immunoprecipitation; truncation mutants; MMC complementation assay","journal":"Blood","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — yeast two-hybrid combined with Co-IP and functional complementation, domain mapping with truncation mutants","pmids":["10961856"],"is_preprint":false},{"year":2000,"finding":"Yeast two-hybrid analysis confirms a strong direct interaction between full-length FANCA and FANCG proteins, and a weak interaction between FANCA and FANCC.","method":"Yeast two-hybrid system with full-length cDNA","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — single method (yeast two-hybrid), but consistent with multiple other studies using Co-IP","pmids":["10627486"],"is_preprint":false},{"year":2001,"finding":"FANCG-deficient CHO mutants (NM3 and UV40) fail to express the monoubiquitinated form of FANCD2 (FANCD2-L); restoration of FANCG by cDNA transfection restores FANCD2-L expression, demonstrating FANCG is required for FANCD2 monoubiquitination.","method":"Immunoblotting for FANCD2 isoforms; FANCG cDNA complementation in CHO mutant cells","journal":"Carcinogenesis","confidence":"High","confidence_rationale":"Tier 2 / Strong — immunoblot for FANCD2 monoubiquitination in multiple FA-G cell lines with complementation controls, replicated by other studies","pmids":["11751423"],"is_preprint":false},{"year":2001,"finding":"Disruption of murine Fancg results in failure to monoubiquitinate FANCD2 in response to ionizing radiation in primary lymphocytes, confirming Fancg's essential role in the FA pathway upstream of FANCD2 activation.","method":"Targeted gene disruption in mice; immunoblot for FANCD2 monoubiquitination after IR treatment","journal":"Blood","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO model with direct molecular readout (FANCD2 monoubiquitination), confirmed in primary cells","pmids":["11719385"],"is_preprint":false},{"year":2001,"finding":"alphaIISp (nonerythroid alpha spectrin), FANCA, FANCC, and FANCG proteins bind to DNA containing psoralen interstrand cross-links, as demonstrated by DNA affinity chromatography from HeLa cell nuclei; purified bovine brain spectrin binds cross-linked DNA directly.","method":"DNA affinity chromatography with psoralen cross-linked DNA; immunoblotting for FA proteins","journal":"Biochemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — DNA affinity chromatography with nuclear extracts and purified spectrin, single lab","pmids":["11401546"],"is_preprint":false},{"year":2002,"finding":"FANCG interacts with cytochrome P450 2E1 (CYP2E1) by yeast two-hybrid; FANCG localizes to cytoplasm and nucleus, with increased cytoplasmic staining after MMC treatment; complementation of FA-G cells with FANCG decreases CYP2E1 levels and reduces oxidative DNA damage (8-oxoG).","method":"Yeast two-hybrid; immunocytochemistry; fluorescent 8-oxoguanine assay; retroviral complementation","journal":"Carcinogenesis","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — yeast two-hybrid for interaction plus functional assay (8-oxoG), single lab, no reciprocal Co-IP confirmed","pmids":["11756225"],"is_preprint":false},{"year":2003,"finding":"FANCG directly interacts with two separate sites in BRCA2 (flanking the BRC repeats) by yeast two-hybrid; FANCG co-immunoprecipitates with BRCA2 from human cells; FANCG co-localizes in nuclear foci with BRCA2 and RAD51 following MMC-induced DNA damage.","method":"Yeast two-hybrid; co-immunoprecipitation; immunofluorescence co-localization after DNA damage","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — yeast two-hybrid combined with Co-IP and nuclear focus co-localization, replicated by subsequent studies","pmids":["12915460"],"is_preprint":false},{"year":2003,"finding":"FANCG is required for efficient homologous recombination (HR) repair of I-SceI-induced chromosomal double-strand breaks; FANCG-deficient DT40 cells show ~9-fold decreased HR repair efficiency and mild decrease in gene targeting efficiency.","method":"FANCG locus disruption in DT40 cells; I-SceI-based HR assay; gene targeting efficiency measurement","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — defined genetic KO with quantitative HR assay and complementation controls in vertebrate cells","pmids":["12861027"],"is_preprint":false},{"year":2004,"finding":"FANCG contains at least seven tetratricopeptide repeat (TPR) motifs; targeted missense mutagenesis disrupting TPR1, TPR2, TPR5, and TPR6 causes loss of FANCG function (failure to complement FA-G cells) correlated with loss of FANCA binding, establishing TPR motifs as functional protein-protein interaction scaffolds within FANCG.","method":"Sequence homology with fish orthologs; targeted TPR mutagenesis; complementation assay; co-immunoprecipitation","journal":"DNA repair","confidence":"High","confidence_rationale":"Tier 1 / Moderate — mutagenesis of multiple TPR motifs with functional complementation readout and binding assays, single lab with multiple mutants","pmids":["14697762"],"is_preprint":false},{"year":2004,"finding":"FANCG is phosphorylated at serine 7; mutation of Ser7 to Ala (S7A) abolishes functional complementation of FA-G cells, causes aberrant chromatin localization (globule formation), and fails to abrogate internuclear bridges, despite S7A retaining ability to bind and stabilize FANCA and FANCC. Phosphoserine 7 was mapped by mass spectrometry.","method":"In vitro kinase assay; mass spectrometry; site-directed mutagenesis; complementation assay; immunofluorescence","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — mass spectrometry mapping combined with mutagenesis and multiple functional readouts, single lab","pmids":["15299017"],"is_preprint":false},{"year":2004,"finding":"FANCG is phosphorylated at serines 383 and 387 during mitosis by Cdc2 kinase; mutation of S383A and S387A abolishes mitotic phosphorylation and impairs FANCG's ability to complement FA-G human and hamster cells; S387A abolishes Cdc2-mediated phosphorylation of FANCG fusion protein.","method":"In vitro Cdc2 kinase assay; mass spectrometry; PCR-directed mutagenesis; phospho-specific antibodies; complementation assay","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro kinase assay + mass spectrometry + phospho-specific antibodies + mutagenesis with functional readout","pmids":["15367677"],"is_preprint":false},{"year":2001,"finding":"FANCG is a phosphoprotein in both nuclear and cytoplasmic fractions; TNF-alpha treatment induces FANCG protein expression and increases nuclear FANCA/FANCG complex levels; IKK-2 inactivation modulates FANCG expression, placing TNF-alpha/NF-kB signaling upstream of FANCG regulation.","method":"Immunoblotting with phospho-specific detection; nuclear fractionation; TNF-alpha treatment; IKK-2 inhibition","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — phosphorylation shown by immunoblot fractionation, TNF regulation by pharmacological inhibition, single lab","pmids":["11181053"],"is_preprint":false},{"year":2006,"finding":"FANCG directly interacts with the RAD51 paralog XRCC3 by yeast two-hybrid; this interaction is disrupted by the FA-G patient-derived mutation L71P; FANCG co-immunoprecipitates with both XRCC3 and BRCA2 independently of other core complex FA proteins; XRCC3 and BRCA2 co-precipitate in a FANCG-dependent manner.","method":"Yeast two-hybrid; co-immunoprecipitation from human and hamster cells; patient-derived mutant analysis","journal":"DNA repair","confidence":"High","confidence_rationale":"Tier 2 / Strong — yeast two-hybrid plus Co-IP in two cell systems with patient mutation and TPR mutant validation","pmids":["16621732"],"is_preprint":false},{"year":2008,"finding":"FANCG promotes formation of a novel protein complex (D1-D2-G-X3) comprising BRCA2/FANCD1, FANCD2, FANCG, and XRCC3; expression of FANCG but not other core complex proteins is required for BRCA2-FANCD2 co-precipitation; phosphorylation of FANCG Ser7 is specifically required for co-precipitation with BRCA2, XRCC3, and FANCD2, and for direct BRCA2-FANCD2 interaction; FANCG and XRCC3 are epistatic for sensitivity to DNA crosslinking agents in DT40 cells.","method":"Co-immunoprecipitation; S7A phospho-mutant analysis; epistasis analysis in DT40 cells; genetic knockouts","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 / Strong — Co-IP with phospho-mutants, genetic epistasis in DT40, multiple cell systems tested","pmids":["18212739"],"is_preprint":false},{"year":2009,"finding":"FANCG interacts directly with the SH3 domain of alphaII spectrin (alphaIISp) through a consensus SH3-binding motif in FANCG; site-directed mutagenesis of this motif disrupts the interaction; FANCC and FANCF, which lack SH3-binding motifs, do not interact with the alphaIISp SH3 domain.","method":"Yeast two-hybrid with alphaIISp domain constructs; site-directed mutagenesis of FANCG SH3-binding motif","journal":"Biochemistry","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — yeast two-hybrid with mutagenesis confirmation, single lab, no in vivo Co-IP validation reported","pmids":["19102630"],"is_preprint":false},{"year":2010,"finding":"FANCG binds directly to ERCC1 (strong affinity) and XPF (moderate affinity) via its TPR motifs; TPRs 1, 3, 5, and 6 are required for FANCG-ERCC1 binding; ERCC1 interacts with FANCG through its central domain (distinct from its XPF-binding region), establishing a direct link between FANCG and the ERCC1-XPF endonuclease that performs ICL unhooking.","method":"Yeast two-hybrid; site-directed mutagenesis of FANCG TPR motifs; domain mapping of ERCC1","journal":"Biochemistry","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — yeast two-hybrid with systematic TPR mutagenesis and domain mapping, single lab, no in vivo Co-IP","pmids":["20518486"],"is_preprint":false},{"year":2010,"finding":"Mutation of FANCG TPR1, TPR2, TPR5, or TPR6 abolishes in vivo binding to BRCA2, XRCC3, FANCA, and FANCF, fails to restore FANCD2 monoubiquitylation, and fails to complement MMC and phleomycin hypersensitivity; FANCG functions as a mediator of protein-protein interactions essential for both FA core complex and D1-D2-G-X3 complex assembly.","method":"Co-immunoprecipitation of TPR mutants; FANCD2 monoubiquitylation assay; MMC/phleomycin sensitivity complementation","journal":"Mutation research","confidence":"High","confidence_rationale":"Tier 2 / Moderate — systematic TPR mutagenesis with Co-IP and functional complementation for multiple interactions, single lab with multiple orthogonal methods","pmids":["20450923"],"is_preprint":false},{"year":2014,"finding":"FANCG is modified by K63-linked polyubiquitin chains in response to DNA damage; K63 ubiquitination of FANCG (at K182, K258, K347) is required for FANCG interaction with the Rap80-BRCA1 complex and for HR repair of ICLs; K63Ub-FANCG is dispensable for FANCD2 monoubiquitination; BRCC36 deubiquitinase removes K63Ub from FANCG in vitro and in vivo.","method":"Ubiquitin linkage-specific immunoblot; lysine-to-arginine mutagenesis (3KR); co-immunoprecipitation; BRCC36 inhibition; HR repair assay","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 / Moderate — linkage-specific ubiquitin detection, mutagenesis, Co-IP, and functional HR assay in single lab with multiple methods","pmids":["25132264"],"is_preprint":false},{"year":2020,"finding":"Cryo-EM structures of Xenopus laevis FANCA alone (3.35 and 3.46 Å) and two distinct FANCA-FANCG complexes (4.59 and 4.84 Å) reveal that FANCA CTD adopts an arc-shaped solenoid; FANCG makes independent contacts with either the FANCA C-terminal HEAT repeats or the N-terminal region; mutations disrupting either interaction prevent FANCA nuclear localization and FA pathway function.","method":"Cryo-electron microscopy structure determination; functional validation by nuclear localization assay","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 1 / Strong — cryo-EM structure at near-atomic resolution combined with functional nuclear localization validation","pmids":["32002546"],"is_preprint":false},{"year":2020,"finding":"An FANCG variant (p.Arg22Pro, c.65G>C) that loses mitochondrial localization retains nuclear DNA repair function and FANCD2 monoubiquitination but fails to protect mitochondria from oxidative stress; loss of mitochondrial FANCG causes transcriptional downregulation of frataxin (FXN) and resulting iron deficiency of the FANCJ helicase.","method":"Patient mutation analysis; subcellular fractionation/localization; FANCD2 monoubiquitination immunoblot; FXN expression analysis; FANCJ activity assay","journal":"Molecular and cellular biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — defined patient mutation with subcellular fractionation, molecular pathway readouts, single lab","pmids":["32989015"],"is_preprint":false},{"year":2021,"finding":"Fancg deficiency causes abnormal primordial germ cell (PGC) migration in mouse embryos: Fancg-/- PGCs show increased random motility, delayed migration to genital ridges, increased cell death, and PGC attrition starting at E9.5; RAC1 inhibition mitigates the abnormal migratory pattern in Fancg-/- PGCs.","method":"Genetic mouse model; in vitro and in vivo PGC migration assays; RAC1 inhibitor treatment; immunofluorescence","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with specific cellular migration assay and pharmacological rescue, single lab","pmids":["34368842"],"is_preprint":false},{"year":2011,"finding":"Fancg is required for hematopoietic stem cell (HSC) quiescence, homing, and engraftment: Fancg-/- HSCs show reduced LSK compartment, loss of quiescence, impaired CXCL12-directed migration in vitro, and defective BM homing after transplantation; key genes involved in HSC self-renewal, quiescence, and migration are dysregulated in Fancg-/- LSK cells.","method":"Genetic KO mouse model; competitive transplantation assay; flow cytometry; in vitro migration assay; gene expression analysis","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with competitive transplant and multiple functional readouts, single lab","pmids":["21968513"],"is_preprint":false},{"year":2009,"finding":"Loss of functional Fancg in mesenchymal stem/progenitor cells (MSPCs) causes defective MSPC proliferation and impaired ability to support hematopoietic stem cell (HSPC) adhesion and engraftment; transplantation of wild-type but not Fancg-/- MSPCs into Fancg-/- recipients restores HSPC engraftment and BM cellularity.","method":"Fancg-/- mouse model; in vitro MSPC-HSPC co-culture; tibial MSPC transplantation; BM reconstitution assay","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with in vivo transplantation rescue experiment, single lab","pmids":["19129541"],"is_preprint":false}],"current_model":"FANCG (identical to XRCC9) is a TPR-motif scaffold protein that acts as a core structural component of the FA nuclear core ubiquitin ligase complex: it directly binds FANCA (via an arginine-rich FANCA motif and FANCG TPR motifs), stabilizes FANCA and promotes nuclear import of the complex, and its C-terminus is additionally required to recruit FANCC; the assembled core complex is required for damage-induced monoubiquitination of FANCD2, which activates downstream DNA repair; independently of core complex function, FANCG also participates in a discrete D1-D2-G-X3 complex (with BRCA2/FANCD1, FANCD2, and XRCC3) whose assembly requires phosphorylation of FANCG at Ser7 and is important for homologous recombination repair of interstrand crosslinks; FANCG is further phosphorylated at Ser383/387 by Cdc2 during mitosis, undergoes K63-linked polyubiquitination that enables interaction with the Rap80-BRCA1 complex for HR repair, and interacts with the ERCC1-XPF endonuclease (via TPRs 1, 3, 5, 6) to link the FA pathway to the ICL unhooking step; a mitochondrial pool of FANCG protects against oxidative stress and supports FANCJ helicase iron-sulfur cluster integrity."},"narrative":{"mechanistic_narrative":"FANCG (identical to XRCC9) is a tetratricopeptide-repeat (TPR) scaffold protein of the Fanconi anemia (FA) DNA-repair pathway, originally identified by its ability to complement the mitomycin C-, cisplatin-, and crosslink-hypersensitive phenotype and chromosomal instability of FA-G cells [PMID:9806548, PMID:9256465]. Within the FA nuclear core complex, FANCG directly binds FANCA through an arginine-rich motif at the FANCA N-terminus and its own C-terminal/TPR contact surfaces, mutually stabilizing the two proteins, promoting nuclear import of the complex, and additionally recruiting FANCC via its C-terminus [PMID:10373536, PMID:10567393, PMID:11050007, PMID:10961856]; cryo-EM of the FANCA-FANCG complex shows FANCG making independent contacts with the FANCA N-terminal region and C-terminal HEAT solenoid, both required for FANCA nuclear localization [PMID:32002546]. Its TPR motifs (notably TPR1, 2, 5, 6) constitute the protein-protein interaction scaffold needed for assembly of both the core complex and downstream complexes [PMID:14697762, PMID:20450923]. The assembled core complex is required for damage-induced monoubiquitination of FANCD2, the central activating event of the pathway [PMID:11751423, PMID:11719385]. Independently of core-complex function, FANCG nucleates a discrete D1-D2-G-X3 complex with BRCA2/FANCD1, FANCD2, and the RAD51 paralog XRCC3, an assembly that depends on phosphorylation of FANCG at Ser7 and supports homologous-recombination repair of interstrand crosslinks [PMID:12915460, PMID:16621732, PMID:18212739], consistent with FANCG being required for efficient HR repair of double-strand breaks [PMID:12861027]. FANCG is further phosphorylated at Ser383/Ser387 by Cdc2 during mitosis [PMID:15367677] and modified by K63-linked polyubiquitin chains that recruit the Rap80-BRCA1 complex for HR repair while being dispensable for FANCD2 monoubiquitination [PMID:25132264], and it links the pathway to the ERCC1-XPF endonuclease that performs ICL unhooking through its TPR motifs [PMID:20518486]. A mitochondrial pool of FANCG, separable from its nuclear repair function, protects against oxidative stress and supports FANCJ helicase iron-sulfur integrity via frataxin [PMID:32989015].","teleology":[{"year":1998,"claim":"Establishing that the FANCG disease gene is identical to XRCC9 connected an uncharacterized FA complementation group to a known crosslink-repair locus.","evidence":"Complementation of FA-G cells with mutation identification, and XRCC9 cDNA correction of CHO UV40 cells across multiple genotoxins with cytogenetic readouts","pmids":["9806548","9256465"],"confidence":"High","gaps":["Did not define the molecular activity of the protein","Placed FANCG in postreplication repair/checkpoint without a mechanism"]},{"year":1999,"claim":"Identifying FANCG as a binding partner that bridges FANCA and FANCC revealed it as a structural component of a nuclear FA protein complex rather than a standalone enzyme.","evidence":"Reciprocal co-immunoprecipitation, nuclear fractionation, and complementation across FA group cell lines; domain mapping placed the contact at FANCA aa 18-29 and non-contiguous FANCG C-terminal regions","pmids":["10373536","10468606","10567393"],"confidence":"High","gaps":["Did not establish the catalytic output of the assembled complex","Interaction surfaces mapped functionally but not structurally"]},{"year":2000,"claim":"Demonstrating mutual FANCA/FANCG stabilization, NLS binding, and a distinct C-terminal FANCC-recruitment requirement explained how FANCG controls assembly and nuclear delivery of the FA complex.","evidence":"Pulse-chase stability assays, yeast two-hybrid, truncation mutants, and co-IP with FANCF incorporation into the nuclear complex","pmids":["11050007","10961856","10627486","11063725"],"confidence":"High","gaps":["Mechanism of nuclear import beyond FANCA NLS binding unresolved","Stoichiometry of the core complex not defined"]},{"year":2001,"claim":"Linking FANCG loss to failed FANCD2 monoubiquitination placed FANCG functionally upstream of the pathway's central activation switch.","evidence":"FANCD2 isoform immunoblotting in FANCG-deficient CHO mutants and Fancg-knockout mouse lymphocytes with complementation/IR controls","pmids":["11751423","11719385"],"confidence":"High","gaps":["Did not identify the ubiquitin ligase acting on FANCD2","Did not explain how the core complex enables monoubiquitination mechanistically"]},{"year":2003,"claim":"Discovery of direct FANCG-BRCA2 binding and an HR repair defect in FANCG-null cells connected the FA core protein to homologous recombination effectors.","evidence":"Yeast two-hybrid, co-IP, MMC-induced focus co-localization with BRCA2/RAD51, and quantitative I-SceI HR assay in DT40 knockouts","pmids":["12915460","12861027"],"confidence":"High","gaps":["Did not resolve whether BRCA2 interaction was within or outside the core complex","HR mechanism downstream of FANCG not defined"]},{"year":2004,"claim":"Defining the TPR scaffold and identifying functional phosphorylation sites (Ser7; Ser383/387 by Cdc2) separated FANCG's binding architecture from regulatory inputs controlling its activity.","evidence":"TPR mutagenesis with complementation/binding readouts; in vitro kinase assays, mass spectrometry, phospho-specific antibodies, and S7A/S383A/S387A mutants with functional complementation","pmids":["14697762","15299017","15367677"],"confidence":"High","gaps":["Kinase responsible for Ser7 phosphorylation not identified","Functional consequence of mitotic Ser383/387 phosphorylation at the pathway level incomplete"]},{"year":2008,"claim":"Defining the Ser7-dependent D1-D2-G-X3 complex established a core-complex-independent role for FANCG in coupling FANCD2 and BRCA2 with XRCC3 for crosslink HR repair.","evidence":"Co-IP requiring FANCG (not other core proteins) for BRCA2-FANCD2 co-precipitation, S7A phospho-mutant analysis, XRCC3 interaction via patient mutation L71P, and FANCG/XRCC3 epistasis in DT40","pmids":["18212739","16621732"],"confidence":"High","gaps":["Structural basis of the D1-D2-G-X3 complex unknown","How Ser7 phosphorylation drives complex assembly mechanistically unresolved"]},{"year":2010,"claim":"Systematic TPR mutagenesis showed FANCG TPR motifs mediate both core-complex and D1-D2-G-X3 assembly and additionally tether the ERCC1-XPF unhooking endonuclease, casting FANCG as a multi-complex interaction hub.","evidence":"TPR1/2/5/6 mutant co-IP against BRCA2, XRCC3, FANCA, FANCF with FANCD2 monoubiquitylation and MMC/phleomycin complementation; yeast two-hybrid and domain mapping of direct ERCC1/XPF binding","pmids":["20450923","20518486"],"confidence":"High","gaps":["ERCC1-XPF interaction lacks in vivo co-IP validation","How a single scaffold partitions among distinct complexes is unknown"]},{"year":2014,"claim":"Identifying DNA-damage-induced K63-linked polyubiquitination of FANCG that recruits Rap80-BRCA1 added a post-translational layer routing FANCG to HR repair separable from FANCD2 monoubiquitination.","evidence":"Linkage-specific ubiquitin immunoblot, 3KR (K182/K258/K347) mutagenesis, co-IP with Rap80-BRCA1, BRCC36 deubiquitinase assays, and HR repair assay","pmids":["25132264"],"confidence":"High","gaps":["Ubiquitin ligase that adds K63 chains to FANCG not identified","Timing relative to other FANCG modifications unresolved"]},{"year":2020,"claim":"A near-atomic cryo-EM model of the FANCA-FANCG complex provided the structural basis for how FANCG drives FANCA nuclear localization, and a mitochondrial-deficient variant revealed a repair-independent FANCG function in oxidative protection.","evidence":"Cryo-EM of Xenopus FANCA and FANCA-FANCG with nuclear-localization validation; patient variant p.Arg22Pro analysis with FANCD2 monoubiquitination, FXN expression, and FANCJ activity readouts","pmids":["32002546","32989015"],"confidence":"High","gaps":["No high-resolution structure of the full core complex","Mechanism by which mitochondrial FANCG regulates frataxin transcription unknown"]},{"year":2021,"claim":"Mouse models extended FANCG function to developmental and stem-cell contexts—germ cell migration and hematopoietic/mesenchymal stem cell maintenance—beyond DNA crosslink repair.","evidence":"Fancg-knockout mouse PGC migration assays with RAC1 inhibitor rescue; competitive transplantation, homing/quiescence and CXCL12 migration assays for HSCs; MSPC co-culture and transplantation rescue","pmids":["34368842","21968513","19129541"],"confidence":"Medium","gaps":["Whether these phenotypes derive from DNA-repair failure or a separable function is unresolved","Direct molecular link between FANCG and RAC1/CXCL12 signaling not established"]},{"year":null,"claim":"How a single TPR scaffold dynamically partitions among the FA core complex, the D1-D2-G-X3 HR complex, the ERCC1-XPF unhooking machinery, and a mitochondrial pool—and what governs the switch between these states—remains unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["No structure of FANCG within the assembled multi-protein complexes","Regulatory hierarchy among Ser7/Ser383/387 phosphorylation and K63 ubiquitination unknown","Mechanism coordinating nuclear versus mitochondrial FANCG pools undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[2,7,15,23]},{"term_id":"GO:0005198","term_label":"structural molecule activity","supporting_discovery_ids":[2,15,25]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[2,3,6]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[3,12]},{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[26]}],"pathway":[{"term_id":"R-HSA-73894","term_label":"DNA Repair","supporting_discovery_ids":[9,14,20,24]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[0,1,26]}],"complexes":["FA nuclear core complex","D1-D2-G-X3 complex"],"partners":["FANCA","FANCC","FANCF","BRCA2","XRCC3","FANCD2","ERCC1","XPF"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O15287","full_name":"Fanconi anemia group G protein","aliases":["DNA repair protein XRCC9"],"length_aa":622,"mass_kda":68.6,"function":"DNA repair protein that may operate in a postreplication repair or a cell cycle checkpoint function. May be implicated in interstrand DNA cross-link repair and in the maintenance of normal chromosome stability. Candidate tumor suppressor gene","subcellular_location":"Nucleus; Cytoplasm","url":"https://www.uniprot.org/uniprotkb/O15287/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/FANCG","classification":"Not Classified","n_dependent_lines":65,"n_total_lines":1208,"dependency_fraction":0.05380794701986755},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/FANCG","total_profiled":1310},"omim":[{"mim_id":"615183","title":"FA CORE COMPLEX-ASSOCIATED PROTEIN 20; FAAP20","url":"https://www.omim.org/entry/615183"},{"mim_id":"614082","title":"FANCONI ANEMIA, COMPLEMENTATION GROUP G; FANCG","url":"https://www.omim.org/entry/614082"},{"mim_id":"613984","title":"FANCD2 GENE; FANCD2","url":"https://www.omim.org/entry/613984"},{"mim_id":"613976","title":"FANCE GENE; FANCE","url":"https://www.omim.org/entry/613976"},{"mim_id":"613899","title":"FANCC GENE; FANCC","url":"https://www.omim.org/entry/613899"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nuclear speckles","reliability":"Supported"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in many","driving_tissues":[],"url":"https://www.proteinatlas.org/search/FANCG"},"hgnc":{"alias_symbol":["FAG"],"prev_symbol":["XRCC9"]},"alphafold":{"accession":"O15287","domains":[{"cath_id":"1.25.40.10","chopping":"209-313","consensus_level":"high","plddt":92.6186,"start":209,"end":313},{"cath_id":"1.25.40.10","chopping":"472-486_506-616","consensus_level":"medium","plddt":84.5215,"start":472,"end":616},{"cath_id":"1.25.40","chopping":"13-106_119-171","consensus_level":"high","plddt":88.7454,"start":13,"end":171}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O15287","model_url":"https://alphafold.ebi.ac.uk/files/AF-O15287-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O15287-F1-predicted_aligned_error_v6.png","plddt_mean":83.12},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=FANCG","jax_strain_url":"https://www.jax.org/strain/search?query=FANCG"},"sequence":{"accession":"O15287","fasta_url":"https://rest.uniprot.org/uniprotkb/O15287.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O15287/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O15287"}},"corpus_meta":[{"pmid":"9806548","id":"PMC_9806548","title":"The Fanconi anaemia group G gene FANCG is identical with XRCC9.","date":"1998","source":"Nature genetics","url":"https://pubmed.ncbi.nlm.nih.gov/9806548","citation_count":277,"is_preprint":false},{"pmid":"10373536","id":"PMC_10373536","title":"Fanconi anemia proteins FANCA, FANCC, and FANCG/XRCC9 interact in a functional nuclear complex.","date":"1999","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/10373536","citation_count":195,"is_preprint":false},{"pmid":"11063725","id":"PMC_11063725","title":"The Fanconi anemia protein FANCF forms a nuclear complex with FANCA, FANCC and FANCG.","date":"2000","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/11063725","citation_count":167,"is_preprint":false},{"pmid":"10468606","id":"PMC_10468606","title":"A physical complex of the Fanconi anemia proteins FANCG/XRCC9 and FANCA.","date":"1999","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/10468606","citation_count":124,"is_preprint":false},{"pmid":"12861027","id":"PMC_12861027","title":"Fanconi anemia FANCG protein in mitigating radiation- and enzyme-induced DNA double-strand breaks by homologous recombination in vertebrate cells.","date":"2003","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/12861027","citation_count":122,"is_preprint":false},{"pmid":"11050007","id":"PMC_11050007","title":"The fanconi anemia proteins FANCA and FANCG stabilize each other and promote the nuclear accumulation of the Fanconi anemia complex.","date":"2000","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/11050007","citation_count":108,"is_preprint":false},{"pmid":"11719385","id":"PMC_11719385","title":"Targeted disruption of the murine Fanconi anemia gene, Fancg/Xrcc9.","date":"2001","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/11719385","citation_count":102,"is_preprint":false},{"pmid":"11823446","id":"PMC_11823446","title":"Reduced fertility and hypersensitivity to mitomycin C characterize Fancg/Xrcc9 null mice.","date":"2002","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/11823446","citation_count":95,"is_preprint":false},{"pmid":"12915460","id":"PMC_12915460","title":"Direct interaction of the Fanconi anaemia protein FANCG with BRCA2/FANCD1.","date":"2003","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/12915460","citation_count":85,"is_preprint":false},{"pmid":"11756225","id":"PMC_11756225","title":"The FANCG Fanconi anemia protein interacts with CYP2E1: possible role in protection against oxidative DNA damage.","date":"2002","source":"Carcinogenesis","url":"https://pubmed.ncbi.nlm.nih.gov/11756225","citation_count":81,"is_preprint":false},{"pmid":"9256465","id":"PMC_9256465","title":"The human XRCC9 gene corrects chromosomal instability and mutagen sensitivities in CHO UV40 cells.","date":"1997","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/9256465","citation_count":69,"is_preprint":false},{"pmid":"18212739","id":"PMC_18212739","title":"FANCG promotes formation of a newly identified protein complex containing BRCA2, FANCD2 and XRCC3.","date":"2008","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/18212739","citation_count":69,"is_preprint":false},{"pmid":"11401546","id":"PMC_11401546","title":"Human alpha spectrin II and the FANCA, FANCC, and FANCG proteins bind to DNA containing psoralen interstrand cross-links.","date":"2001","source":"Biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/11401546","citation_count":67,"is_preprint":false},{"pmid":"14726700","id":"PMC_14726700","title":"The genetics of FANCC and FANCG in familial pancreatic cancer.","date":"2004","source":"Cancer biology & therapy","url":"https://pubmed.ncbi.nlm.nih.gov/14726700","citation_count":62,"is_preprint":false},{"pmid":"14697762","id":"PMC_14697762","title":"Multiple TPR motifs characterize the Fanconi anemia FANCG protein.","date":"2004","source":"DNA repair","url":"https://pubmed.ncbi.nlm.nih.gov/14697762","citation_count":57,"is_preprint":false},{"pmid":"15533833","id":"PMC_15533833","title":"New insights into the Fanconi anemia pathway from an isogenic FancG hamster CHO mutant.","date":"2005","source":"DNA repair","url":"https://pubmed.ncbi.nlm.nih.gov/15533833","citation_count":56,"is_preprint":false},{"pmid":"19129541","id":"PMC_19129541","title":"Mesenchymal stem/progenitor cells promote the reconstitution of exogenous hematopoietic stem cells in Fancg-/- mice in vivo.","date":"2009","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/19129541","citation_count":56,"is_preprint":false},{"pmid":"11093276","id":"PMC_11093276","title":"Spectrum of mutations in the Fanconi anaemia group G gene, FANCG/XRCC9.","date":"2000","source":"European journal of human genetics : EJHG","url":"https://pubmed.ncbi.nlm.nih.gov/11093276","citation_count":51,"is_preprint":false},{"pmid":"21750350","id":"PMC_21750350","title":"Areca nut induces miR-23a and inhibits repair of DNA double-strand breaks by targeting FANCG.","date":"2011","source":"Toxicological sciences : an official journal of the Society of Toxicology","url":"https://pubmed.ncbi.nlm.nih.gov/21750350","citation_count":49,"is_preprint":false},{"pmid":"16762635","id":"PMC_16762635","title":"Targeted disruption of FANCC and FANCG in human cancer provides a preclinical model for specific therapeutic options.","date":"2006","source":"Gastroenterology","url":"https://pubmed.ncbi.nlm.nih.gov/16762635","citation_count":47,"is_preprint":false},{"pmid":"10567393","id":"PMC_10567393","title":"Resistance to mitomycin C requires direct interaction between the Fanconi anemia proteins FANCA and FANCG in the nucleus through an arginine-rich domain.","date":"1999","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/10567393","citation_count":47,"is_preprint":false},{"pmid":"20606166","id":"PMC_20606166","title":"Genetic disruption of both Fancc and Fancg in mice recapitulates the hematopoietic manifestations of Fanconi anemia.","date":"2010","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/20606166","citation_count":41,"is_preprint":false},{"pmid":"16621732","id":"PMC_16621732","title":"Tetratricopeptide-motif-mediated interaction of FANCG with recombination proteins XRCC3 and BRCA2.","date":"2006","source":"DNA repair","url":"https://pubmed.ncbi.nlm.nih.gov/16621732","citation_count":40,"is_preprint":false},{"pmid":"15299017","id":"PMC_15299017","title":"Phosphorylation of fanconi anemia (FA) complementation group G protein, FANCG, at serine 7 is important for function of the FA pathway.","date":"2004","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/15299017","citation_count":39,"is_preprint":false},{"pmid":"16946306","id":"PMC_16946306","title":"Continuous in vivo infusion of interferon-gamma (IFN-gamma) enhances engraftment of syngeneic wild-type cells in Fanca-/- and Fancg-/- mice.","date":"2006","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/16946306","citation_count":39,"is_preprint":false},{"pmid":"11751423","id":"PMC_11751423","title":"The Chinese hamster FANCG/XRCC9 mutant NM3 fails to express the monoubiquitinated form of the FANCD2 protein, is hypersensitive to a range of DNA damaging agents and exhibits a normal level of spontaneous sister chromatid exchange.","date":"2001","source":"Carcinogenesis","url":"https://pubmed.ncbi.nlm.nih.gov/11751423","citation_count":36,"is_preprint":false},{"pmid":"12552564","id":"PMC_12552564","title":"Spectrum of sequence variation in the FANCG gene: an International Fanconi Anemia Registry (IFAR) study.","date":"2003","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/12552564","citation_count":32,"is_preprint":false},{"pmid":"15367677","id":"PMC_15367677","title":"FANCG is phosphorylated at serines 383 and 387 during mitosis.","date":"2004","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/15367677","citation_count":31,"is_preprint":false},{"pmid":"15310064","id":"PMC_15310064","title":"Expression and epitope analysis of the major allergenic protein Fag e 1 from buckwheat.","date":"2004","source":"Journal of plant physiology","url":"https://pubmed.ncbi.nlm.nih.gov/15310064","citation_count":31,"is_preprint":false},{"pmid":"15128869","id":"PMC_15128869","title":"Expression of fragments of translation initiation factor eIF4GI reveals a nuclear localisation signal within the N-terminal apoptotic cleavage fragment N-FAG.","date":"2004","source":"Journal of cell science","url":"https://pubmed.ncbi.nlm.nih.gov/15128869","citation_count":29,"is_preprint":false},{"pmid":"10627486","id":"PMC_10627486","title":"Strong FANCA/FANCG but weak FANCA/FANCC interaction in the yeast 2-hybrid system.","date":"2000","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/10627486","citation_count":27,"is_preprint":false},{"pmid":"15319283","id":"PMC_15319283","title":"Telomere dynamics in Fancg-deficient mouse and human cells.","date":"2004","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/15319283","citation_count":26,"is_preprint":false},{"pmid":"10961856","id":"PMC_10961856","title":"Carboxy terminal region of the Fanconi anemia protein, FANCG/XRCC9, is required for functional activity.","date":"2000","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/10961856","citation_count":25,"is_preprint":false},{"pmid":"23165788","id":"PMC_23165788","title":"Effects of Maillard reaction on allergenicity of buckwheat allergen Fag t 3 during thermal processing.","date":"2012","source":"Journal of the science of food and agriculture","url":"https://pubmed.ncbi.nlm.nih.gov/23165788","citation_count":24,"is_preprint":false},{"pmid":"19102630","id":"PMC_19102630","title":"The SH3 domain of alphaII spectrin is a target for the Fanconi anemia protein, FANCG.","date":"2009","source":"Biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/19102630","citation_count":24,"is_preprint":false},{"pmid":"12673805","id":"PMC_12673805","title":"Two common founder mutations of the fanconi anemia group G gene FANCG/XRCC9 in the Japanese population.","date":"2003","source":"Human mutation","url":"https://pubmed.ncbi.nlm.nih.gov/12673805","citation_count":21,"is_preprint":false},{"pmid":"21968513","id":"PMC_21968513","title":"Impaired functionality and homing of Fancg-deficient hematopoietic stem cells.","date":"2011","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/21968513","citation_count":21,"is_preprint":false},{"pmid":"20518486","id":"PMC_20518486","title":"The Fanconi anemia protein, FANCG, binds to the ERCC1-XPF endonuclease via its tetratricopeptide repeats and the central domain of ERCC1.","date":"2010","source":"Biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/20518486","citation_count":21,"is_preprint":false},{"pmid":"29171912","id":"PMC_29171912","title":"Concomitant sensitization to legumin, Fag e 2 and Fag e 5 predicts buckwheat allergy.","date":"2017","source":"Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology","url":"https://pubmed.ncbi.nlm.nih.gov/29171912","citation_count":20,"is_preprint":false},{"pmid":"11181053","id":"PMC_11181053","title":"Fanconi anemia protein, FANCG, is a phosphoprotein and is upregulated with FANCA after TNF-alpha treatment.","date":"2001","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/11181053","citation_count":20,"is_preprint":false},{"pmid":"23067021","id":"PMC_23067021","title":"FANCA and FANCG are the major Fanconi anemia genes in the Korean population.","date":"2013","source":"Clinical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/23067021","citation_count":20,"is_preprint":false},{"pmid":"21118969","id":"PMC_21118969","title":"Genomic instability in mice is greater in Fanconi anemia caused by deficiency of Fancd2 than Fancg.","date":"2010","source":"Cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/21118969","citation_count":20,"is_preprint":false},{"pmid":"11438206","id":"PMC_11438206","title":"Functional analysis of patient-derived mutations in the Fanconi anemia gene, FANCG/XRCC9.","date":"2001","source":"Experimental hematology","url":"https://pubmed.ncbi.nlm.nih.gov/11438206","citation_count":19,"is_preprint":false},{"pmid":"29584588","id":"PMC_29584588","title":"Amelioration of Head and Neck Radiation-Induced Mucositis and Distant Marrow Suppression in Fanca-/- and Fancg-/- Mice by Intraoral Administration of GS-Nitroxide (JP4-039).","date":"2018","source":"Radiation research","url":"https://pubmed.ncbi.nlm.nih.gov/29584588","citation_count":19,"is_preprint":false},{"pmid":"20450923","id":"PMC_20450923","title":"Several tetratricopeptide repeat (TPR) motifs of FANCG are required for assembly of the BRCA2/D1-D2-G-X3 complex, FANCD2 monoubiquitylation and phleomycin resistance.","date":"2010","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/20450923","citation_count":19,"is_preprint":false},{"pmid":"11918676","id":"PMC_11918676","title":"Characterization, expression and complex formation of the murine Fanconi anaemia gene product Fancg.","date":"2002","source":"Genes to cells : devoted to molecular & cellular mechanisms","url":"https://pubmed.ncbi.nlm.nih.gov/11918676","citation_count":18,"is_preprint":false},{"pmid":"25132264","id":"PMC_25132264","title":"K63-linked ubiquitination of FANCG is required for its association with the Rap80-BRCA1 complex to modulate homologous recombination repair of DNA interstand crosslinks.","date":"2014","source":"Oncogene","url":"https://pubmed.ncbi.nlm.nih.gov/25132264","citation_count":17,"is_preprint":false},{"pmid":"10807541","id":"PMC_10807541","title":"Novel mutations of the FANCG gene causing alternative splicing in Japanese Fanconi anemia.","date":"2000","source":"Journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/10807541","citation_count":17,"is_preprint":false},{"pmid":"32002546","id":"PMC_32002546","title":"Structural basis of the fanconi anemia-associated mutations within the FANCA and FANCG complex.","date":"2020","source":"Nucleic acids research","url":"https://pubmed.ncbi.nlm.nih.gov/32002546","citation_count":13,"is_preprint":false},{"pmid":"30002383","id":"PMC_30002383","title":"Structural basis for cross-reactivity and conformation fluctuation of the major beech pollen allergen Fag s 1.","date":"2018","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/30002383","citation_count":13,"is_preprint":false},{"pmid":"29635254","id":"PMC_29635254","title":"Specific IgE for Fag e 3 Predicts Oral Buckwheat Food Challenge Test Results and Anaphylaxis: A Pilot Study.","date":"2018","source":"International archives of allergy and immunology","url":"https://pubmed.ncbi.nlm.nih.gov/29635254","citation_count":13,"is_preprint":false},{"pmid":"28440438","id":"PMC_28440438","title":"Loss of heterozygosity in FANCG, FANCF and BRIP1 from head and neck squamous cell carcinoma of the oral cavity.","date":"2017","source":"International journal of oncology","url":"https://pubmed.ncbi.nlm.nih.gov/28440438","citation_count":12,"is_preprint":false},{"pmid":"34076413","id":"PMC_34076413","title":"Identification of a Novel Major Allergen in Buckwheat Seeds: Fag t 6.","date":"2021","source":"Journal of agricultural and food chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/34076413","citation_count":12,"is_preprint":false},{"pmid":"19795882","id":"PMC_19795882","title":"Modulation of immunoresponse in BALB/c mice by oral administration of Fag e 1-glucomannan conjugate.","date":"2009","source":"Journal of agricultural and food chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/19795882","citation_count":11,"is_preprint":false},{"pmid":"15123790","id":"PMC_15123790","title":"Characterization of the hamster FancG/Xrcc9 gene and mutations in CHO UV40 and NM3.","date":"2004","source":"Mutagenesis","url":"https://pubmed.ncbi.nlm.nih.gov/15123790","citation_count":10,"is_preprint":false},{"pmid":"34368842","id":"PMC_34368842","title":"Abnormal migration behavior linked to Rac1 signaling contributes to primordial germ cell exhaustion in Fanconi anemia pathway-deficient Fancg-/- embryos.","date":"2021","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/34368842","citation_count":10,"is_preprint":false},{"pmid":"35216452","id":"PMC_35216452","title":"Fanconi Anemia Patients from an Indigenous Community in Mexico Carry a New Founder Pathogenic Variant in FANCG.","date":"2022","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/35216452","citation_count":10,"is_preprint":false},{"pmid":"1389030","id":"PMC_1389030","title":"Profile and prevalence of the brain fag syndrome: psychiatric morbidity in school populations in Africa.","date":"1992","source":"The British journal of psychiatry. Supplement","url":"https://pubmed.ncbi.nlm.nih.gov/1389030","citation_count":10,"is_preprint":false},{"pmid":"1972129","id":"PMC_1972129","title":"Blood stem cell autografts in malignant blood disease: the French experience with a special focus on myeloma. The France Autogreffe Group (FAG).","date":"1990","source":"Haematologica","url":"https://pubmed.ncbi.nlm.nih.gov/1972129","citation_count":9,"is_preprint":false},{"pmid":"22036606","id":"PMC_22036606","title":"Evidence for complete epistasis of null mutations in murine Fanconi anemia genes Fanca and Fancg.","date":"2011","source":"DNA repair","url":"https://pubmed.ncbi.nlm.nih.gov/22036606","citation_count":8,"is_preprint":false},{"pmid":"24300640","id":"PMC_24300640","title":"Fanconi anaemia in black South African patients heterozygous for the FANCG c.637-643delTACCGCC founder mutation.","date":"2013","source":"South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde","url":"https://pubmed.ncbi.nlm.nih.gov/24300640","citation_count":8,"is_preprint":false},{"pmid":"28677355","id":"PMC_28677355","title":"Monoclonal Antibodies to Recombinant Fag e 3 Buckwheat Allergen and Development of a Two-site ELISA for Its Quantification.","date":"2017","source":"Allergy, asthma & immunology research","url":"https://pubmed.ncbi.nlm.nih.gov/28677355","citation_count":8,"is_preprint":false},{"pmid":"32529760","id":"PMC_32529760","title":"Endocrine profiling in patients with Fanconi anemia, homozygous for a FANCG founder mutation.","date":"2020","source":"Molecular genetics & genomic medicine","url":"https://pubmed.ncbi.nlm.nih.gov/32529760","citation_count":7,"is_preprint":false},{"pmid":"25477267","id":"PMC_25477267","title":"Hematological consequences of a FANCG founder mutation in Black South African patients with Fanconi anemia.","date":"2014","source":"Blood cells, molecules & diseases","url":"https://pubmed.ncbi.nlm.nih.gov/25477267","citation_count":7,"is_preprint":false},{"pmid":"17097336","id":"PMC_17097336","title":"Role of the Fancg gene in protecting cells from particulate chromate-induced chromosome instability.","date":"2006","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/17097336","citation_count":7,"is_preprint":false},{"pmid":"17584296","id":"PMC_17584296","title":"Identification, developmental expression and regulation of the Xenopus ortholog of human FANCG/XRCC9.","date":"2007","source":"Genes to cells : devoted to molecular & cellular mechanisms","url":"https://pubmed.ncbi.nlm.nih.gov/17584296","citation_count":6,"is_preprint":false},{"pmid":"27358865","id":"PMC_27358865","title":"Interleukin 8/KC enhances G-CSF induced hematopoietic stem/progenitor cell mobilization in Fancg deficient mice.","date":"2014","source":"Stem cell investigation","url":"https://pubmed.ncbi.nlm.nih.gov/27358865","citation_count":6,"is_preprint":false},{"pmid":"39149814","id":"PMC_39149814","title":"A comprehensive study evaluating germline FANCG variants in predisposition to breast and ovarian cancer.","date":"2024","source":"Cancer medicine","url":"https://pubmed.ncbi.nlm.nih.gov/39149814","citation_count":5,"is_preprint":false},{"pmid":"28627524","id":"PMC_28627524","title":"Screening for mutations in two exons of FANCG gene in Pakistani population.","date":"2017","source":"Biomedical papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia","url":"https://pubmed.ncbi.nlm.nih.gov/28627524","citation_count":5,"is_preprint":false},{"pmid":"34864095","id":"PMC_34864095","title":"In silico study of missense variants of FANCA, FANCC and FANCG genes reveals high risk deleterious alleles predisposing to Fanconi anemia pathogenesis.","date":"2021","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/34864095","citation_count":5,"is_preprint":false},{"pmid":"34378069","id":"PMC_34378069","title":"A solvent-assisted ESIPT fluorescent dye for F-/Ag+ sensing and high-resolution imaging of the cilia in live cells.","date":"2021","source":"Analytical and bioanalytical chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/34378069","citation_count":5,"is_preprint":false},{"pmid":"32989015","id":"PMC_32989015","title":"Loss of Mitochondrial Localization of Human FANCG Causes Defective FANCJ Helicase.","date":"2020","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/32989015","citation_count":4,"is_preprint":false},{"pmid":"32947577","id":"PMC_32947577","title":"Clinical and Genetic Features of Patients With Fanconi Anemia in Lebanon and Report on Novel Mutations in the FANCA and FANCG Genes.","date":"2021","source":"Journal of pediatric hematology/oncology","url":"https://pubmed.ncbi.nlm.nih.gov/32947577","citation_count":4,"is_preprint":false},{"pmid":"22449541","id":"PMC_22449541","title":"Synthesis of hypoallergenic derivatives of the major allergen Fag t 1 from tartary buckwheat via sequence restructuring.","date":"2012","source":"Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association","url":"https://pubmed.ncbi.nlm.nih.gov/22449541","citation_count":4,"is_preprint":false},{"pmid":"26289775","id":"PMC_26289775","title":"1H, 13C and 15N resonance assignments and second structure information of Fag s 1: Fagales allergen from Fagus sylvatica.","date":"2015","source":"Biomolecular NMR assignments","url":"https://pubmed.ncbi.nlm.nih.gov/26289775","citation_count":3,"is_preprint":false},{"pmid":"36187231","id":"PMC_36187231","title":"2S albumin g13 polypeptide, less related to Fag e 2, can be eliminated in common buckwheat (Fagopyrum esculentum Moench) seeds.","date":"2022","source":"Food chemistry. Molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/36187231","citation_count":3,"is_preprint":false},{"pmid":"36292578","id":"PMC_36292578","title":"Identification of a Hypomorphic FANCG Variant in Bernese Mountain Dogs.","date":"2022","source":"Genes","url":"https://pubmed.ncbi.nlm.nih.gov/36292578","citation_count":2,"is_preprint":false},{"pmid":"19427512","id":"PMC_19427512","title":"RAD51D- and FANCG-dependent base substitution mutagenesis at the ATP1A1 locus in mammalian cells.","date":"2009","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/19427512","citation_count":2,"is_preprint":false},{"pmid":"28024295","id":"PMC_28024295","title":"Characterization of two novel FANCG mutations in Indian Fanconi anemia patients.","date":"2016","source":"Leukemia research","url":"https://pubmed.ncbi.nlm.nih.gov/28024295","citation_count":2,"is_preprint":false},{"pmid":"25468825","id":"PMC_25468825","title":"Brain fag: New perspectives from case observations.","date":"2014","source":"Transcultural psychiatry","url":"https://pubmed.ncbi.nlm.nih.gov/25468825","citation_count":2,"is_preprint":false},{"pmid":"37446306","id":"PMC_37446306","title":"A C57BL/6J Fancg-KO Mouse Model Generated by CRISPR/Cas9 Partially Captures the Human Phenotype.","date":"2023","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/37446306","citation_count":1,"is_preprint":false},{"pmid":"39477388","id":"PMC_39477388","title":"Chemical Carcinogen (3-Methylcholanthrene)-induced Pleomorphic Rhabdomyosarcomas in Fanconi Anemia Fancd2-/-, Fancg-/- (C57BL/6), Fancd2-/- (129/Sv) Mice.","date":"2024","source":"In vivo (Athens, Greece)","url":"https://pubmed.ncbi.nlm.nih.gov/39477388","citation_count":1,"is_preprint":false},{"pmid":"40832771","id":"PMC_40832771","title":"A seed-specific promoter from allergen gene Fag t 2 in Tartary buckwheat (Fagopyrum tataricum) and its responses to phytohormone.","date":"2025","source":"Journal of the science of food and agriculture","url":"https://pubmed.ncbi.nlm.nih.gov/40832771","citation_count":0,"is_preprint":false},{"pmid":"17010390","id":"PMC_17010390","title":"Four human FANCG polymorphic variants show normal biological function in hamster CHO cells.","date":"2006","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/17010390","citation_count":0,"is_preprint":false},{"pmid":"23484681","id":"PMC_23484681","title":"[Expression of FANCG gene in acute myeloid leukemia].","date":"2013","source":"Zhongguo shi yan xue ye xue za zhi","url":"https://pubmed.ncbi.nlm.nih.gov/23484681","citation_count":0,"is_preprint":false},{"pmid":"38854659","id":"PMC_38854659","title":"Establishment of monoclonal antibodies of BW10kDa distinguish it from Fag e 2 related to anaphylaxis.","date":"2024","source":"Food chemistry. Molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/38854659","citation_count":0,"is_preprint":false},{"pmid":"34436527","id":"PMC_34436527","title":"Frequent internuclear bridging in a Fanconi anemia patient with FANCG mutation.","date":"2021","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/34436527","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":43956,"output_tokens":7253,"usd":0.120331,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":16319,"output_tokens":4456,"usd":0.096497,"stage2_stop_reason":"end_turn"},"total_usd":0.216828,"stage1_batch_id":"msgbatch_01AsR7g8dGTEiEw9U83bJeWn","stage2_batch_id":"msgbatch_01YV5ZyxtFNUZEjxRcpd9jzb","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1998,\n      \"finding\": \"FANCG is identical to XRCC9, a gene that complements the MMC-sensitive Chinese hamster mutant UV40, implicating FANCG in DNA post-replication repair or cell cycle checkpoint control.\",\n      \"method\": \"Complementation of FA-G cell line; identification of pathogenic mutations in FA-G patients\",\n      \"journal\": \"Nature genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — complementation assay with mutation identification, replicated across multiple FA-G patients, foundational paper establishing gene identity\",\n      \"pmids\": [\"9806548\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"XRCC9/FANCG partially corrects hypersensitivity of CHO UV40 cells to mitomycin C, cisplatin, ethyl methanesulfonate, UV, and gamma-radiation, and almost fully corrects spontaneous chromosomal aberrations, placing FANCG in a postreplication repair or cell cycle checkpoint function.\",\n      \"method\": \"Complementation assay; cDNA transfection into CHO UV40 cells; cytogenetic analysis\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — functional complementation with multiple genotoxic agents and cytogenetic readouts in the original cloning paper\",\n      \"pmids\": [\"9256465\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"FANCG protein is required for binding of FANCA and FANCC proteins to each other, and is itself a component of a nuclear protein complex containing FANCA and FANCC; the amino-terminal region of FANCA is required for FANCG binding.\",\n      \"method\": \"Co-immunoprecipitation; nuclear fractionation; complementation assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal Co-IP with nuclear fractionation, complementation data, replicated by multiple groups\",\n      \"pmids\": [\"10373536\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"FANCG localizes to both cytoplasm and nucleus, and forms a physical complex with FANCA both in vivo and in vitro; the FANCA/FANCG complex is absent in FA-A and FA-G cell lines but present in FA-D and FA-E cells, indicating group-specific assembly requirements.\",\n      \"method\": \"Co-immunoprecipitation in vivo and in vitro; nuclear/cytoplasmic fractionation; transfection and cell fusion correction experiments\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo and in vitro Co-IP across multiple FA complementation group cell lines, complemented by correction experiments\",\n      \"pmids\": [\"10468606\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"The FANCA-FANCG interaction domain maps to amino acids 18-29 of FANCA (arginine-rich motif RRRAWAELLAG) and to two non-contiguous carboxy-terminal domains of FANCG (aa 400-475 and 585-622); mutations in this domain abolish complementation of MMC sensitivity, demonstrating that nuclear FANCA-FANCG complexes are required for cellular resistance to MMC.\",\n      \"method\": \"Site-directed mutagenesis; co-immunoprecipitation; NLS/NES targeting constructs; MMC sensitivity assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — mutagenesis with functional readout (MMC complementation) and localization experiments in single lab with multiple orthogonal methods\",\n      \"pmids\": [\"10567393\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"FANCF forms a nuclear complex with FANCA, FANCC, and FANCG; each FA protein (except FANCD) is required for these complexes to form, as demonstrated by absence of interactions in the corresponding complementation group cell lines.\",\n      \"method\": \"Co-immunoprecipitation; nuclear fractionation in FA complementation group lymphoblasts\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal Co-IP across multiple FA complementation group cell lines, replicated across labs\",\n      \"pmids\": [\"11063725\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"FANCG and FANCA stabilize each other: correction of FA-G cells with FANCG cDNA prolongs FANCA half-life and increases nuclear accumulation of the FA protein complex; reciprocally, FANCA correction increases FANCG half-life. FANCG binds the amino-terminal NLS of FANCA, and this binding is required for nuclear translocation of the complex.\",\n      \"method\": \"Retroviral complementation; pulse-chase protein stability assays; co-immunoprecipitation; nuclear fractionation\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pulse-chase stability assays combined with Co-IP and nuclear fractionation, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"11050007\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"The amino-terminal two-thirds of FANCG (aa 1-428) binds to the FANCA NLS, but the carboxy terminus of FANCG is additionally required for binding FANCC and for functional complementation of FA-G cells; thus FANCG binding to FANCA is necessary but not sufficient for full FANCG activity.\",\n      \"method\": \"Yeast two-hybrid; co-immunoprecipitation; truncation mutants; MMC complementation assay\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — yeast two-hybrid combined with Co-IP and functional complementation, domain mapping with truncation mutants\",\n      \"pmids\": [\"10961856\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Yeast two-hybrid analysis confirms a strong direct interaction between full-length FANCA and FANCG proteins, and a weak interaction between FANCA and FANCC.\",\n      \"method\": \"Yeast two-hybrid system with full-length cDNA\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — single method (yeast two-hybrid), but consistent with multiple other studies using Co-IP\",\n      \"pmids\": [\"10627486\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"FANCG-deficient CHO mutants (NM3 and UV40) fail to express the monoubiquitinated form of FANCD2 (FANCD2-L); restoration of FANCG by cDNA transfection restores FANCD2-L expression, demonstrating FANCG is required for FANCD2 monoubiquitination.\",\n      \"method\": \"Immunoblotting for FANCD2 isoforms; FANCG cDNA complementation in CHO mutant cells\",\n      \"journal\": \"Carcinogenesis\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — immunoblot for FANCD2 monoubiquitination in multiple FA-G cell lines with complementation controls, replicated by other studies\",\n      \"pmids\": [\"11751423\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Disruption of murine Fancg results in failure to monoubiquitinate FANCD2 in response to ionizing radiation in primary lymphocytes, confirming Fancg's essential role in the FA pathway upstream of FANCD2 activation.\",\n      \"method\": \"Targeted gene disruption in mice; immunoblot for FANCD2 monoubiquitination after IR treatment\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO model with direct molecular readout (FANCD2 monoubiquitination), confirmed in primary cells\",\n      \"pmids\": [\"11719385\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"alphaIISp (nonerythroid alpha spectrin), FANCA, FANCC, and FANCG proteins bind to DNA containing psoralen interstrand cross-links, as demonstrated by DNA affinity chromatography from HeLa cell nuclei; purified bovine brain spectrin binds cross-linked DNA directly.\",\n      \"method\": \"DNA affinity chromatography with psoralen cross-linked DNA; immunoblotting for FA proteins\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — DNA affinity chromatography with nuclear extracts and purified spectrin, single lab\",\n      \"pmids\": [\"11401546\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"FANCG interacts with cytochrome P450 2E1 (CYP2E1) by yeast two-hybrid; FANCG localizes to cytoplasm and nucleus, with increased cytoplasmic staining after MMC treatment; complementation of FA-G cells with FANCG decreases CYP2E1 levels and reduces oxidative DNA damage (8-oxoG).\",\n      \"method\": \"Yeast two-hybrid; immunocytochemistry; fluorescent 8-oxoguanine assay; retroviral complementation\",\n      \"journal\": \"Carcinogenesis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — yeast two-hybrid for interaction plus functional assay (8-oxoG), single lab, no reciprocal Co-IP confirmed\",\n      \"pmids\": [\"11756225\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"FANCG directly interacts with two separate sites in BRCA2 (flanking the BRC repeats) by yeast two-hybrid; FANCG co-immunoprecipitates with BRCA2 from human cells; FANCG co-localizes in nuclear foci with BRCA2 and RAD51 following MMC-induced DNA damage.\",\n      \"method\": \"Yeast two-hybrid; co-immunoprecipitation; immunofluorescence co-localization after DNA damage\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — yeast two-hybrid combined with Co-IP and nuclear focus co-localization, replicated by subsequent studies\",\n      \"pmids\": [\"12915460\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"FANCG is required for efficient homologous recombination (HR) repair of I-SceI-induced chromosomal double-strand breaks; FANCG-deficient DT40 cells show ~9-fold decreased HR repair efficiency and mild decrease in gene targeting efficiency.\",\n      \"method\": \"FANCG locus disruption in DT40 cells; I-SceI-based HR assay; gene targeting efficiency measurement\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — defined genetic KO with quantitative HR assay and complementation controls in vertebrate cells\",\n      \"pmids\": [\"12861027\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"FANCG contains at least seven tetratricopeptide repeat (TPR) motifs; targeted missense mutagenesis disrupting TPR1, TPR2, TPR5, and TPR6 causes loss of FANCG function (failure to complement FA-G cells) correlated with loss of FANCA binding, establishing TPR motifs as functional protein-protein interaction scaffolds within FANCG.\",\n      \"method\": \"Sequence homology with fish orthologs; targeted TPR mutagenesis; complementation assay; co-immunoprecipitation\",\n      \"journal\": \"DNA repair\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — mutagenesis of multiple TPR motifs with functional complementation readout and binding assays, single lab with multiple mutants\",\n      \"pmids\": [\"14697762\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"FANCG is phosphorylated at serine 7; mutation of Ser7 to Ala (S7A) abolishes functional complementation of FA-G cells, causes aberrant chromatin localization (globule formation), and fails to abrogate internuclear bridges, despite S7A retaining ability to bind and stabilize FANCA and FANCC. Phosphoserine 7 was mapped by mass spectrometry.\",\n      \"method\": \"In vitro kinase assay; mass spectrometry; site-directed mutagenesis; complementation assay; immunofluorescence\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — mass spectrometry mapping combined with mutagenesis and multiple functional readouts, single lab\",\n      \"pmids\": [\"15299017\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"FANCG is phosphorylated at serines 383 and 387 during mitosis by Cdc2 kinase; mutation of S383A and S387A abolishes mitotic phosphorylation and impairs FANCG's ability to complement FA-G human and hamster cells; S387A abolishes Cdc2-mediated phosphorylation of FANCG fusion protein.\",\n      \"method\": \"In vitro Cdc2 kinase assay; mass spectrometry; PCR-directed mutagenesis; phospho-specific antibodies; complementation assay\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro kinase assay + mass spectrometry + phospho-specific antibodies + mutagenesis with functional readout\",\n      \"pmids\": [\"15367677\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"FANCG is a phosphoprotein in both nuclear and cytoplasmic fractions; TNF-alpha treatment induces FANCG protein expression and increases nuclear FANCA/FANCG complex levels; IKK-2 inactivation modulates FANCG expression, placing TNF-alpha/NF-kB signaling upstream of FANCG regulation.\",\n      \"method\": \"Immunoblotting with phospho-specific detection; nuclear fractionation; TNF-alpha treatment; IKK-2 inhibition\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — phosphorylation shown by immunoblot fractionation, TNF regulation by pharmacological inhibition, single lab\",\n      \"pmids\": [\"11181053\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"FANCG directly interacts with the RAD51 paralog XRCC3 by yeast two-hybrid; this interaction is disrupted by the FA-G patient-derived mutation L71P; FANCG co-immunoprecipitates with both XRCC3 and BRCA2 independently of other core complex FA proteins; XRCC3 and BRCA2 co-precipitate in a FANCG-dependent manner.\",\n      \"method\": \"Yeast two-hybrid; co-immunoprecipitation from human and hamster cells; patient-derived mutant analysis\",\n      \"journal\": \"DNA repair\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — yeast two-hybrid plus Co-IP in two cell systems with patient mutation and TPR mutant validation\",\n      \"pmids\": [\"16621732\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"FANCG promotes formation of a novel protein complex (D1-D2-G-X3) comprising BRCA2/FANCD1, FANCD2, FANCG, and XRCC3; expression of FANCG but not other core complex proteins is required for BRCA2-FANCD2 co-precipitation; phosphorylation of FANCG Ser7 is specifically required for co-precipitation with BRCA2, XRCC3, and FANCD2, and for direct BRCA2-FANCD2 interaction; FANCG and XRCC3 are epistatic for sensitivity to DNA crosslinking agents in DT40 cells.\",\n      \"method\": \"Co-immunoprecipitation; S7A phospho-mutant analysis; epistasis analysis in DT40 cells; genetic knockouts\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — Co-IP with phospho-mutants, genetic epistasis in DT40, multiple cell systems tested\",\n      \"pmids\": [\"18212739\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"FANCG interacts directly with the SH3 domain of alphaII spectrin (alphaIISp) through a consensus SH3-binding motif in FANCG; site-directed mutagenesis of this motif disrupts the interaction; FANCC and FANCF, which lack SH3-binding motifs, do not interact with the alphaIISp SH3 domain.\",\n      \"method\": \"Yeast two-hybrid with alphaIISp domain constructs; site-directed mutagenesis of FANCG SH3-binding motif\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — yeast two-hybrid with mutagenesis confirmation, single lab, no in vivo Co-IP validation reported\",\n      \"pmids\": [\"19102630\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"FANCG binds directly to ERCC1 (strong affinity) and XPF (moderate affinity) via its TPR motifs; TPRs 1, 3, 5, and 6 are required for FANCG-ERCC1 binding; ERCC1 interacts with FANCG through its central domain (distinct from its XPF-binding region), establishing a direct link between FANCG and the ERCC1-XPF endonuclease that performs ICL unhooking.\",\n      \"method\": \"Yeast two-hybrid; site-directed mutagenesis of FANCG TPR motifs; domain mapping of ERCC1\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — yeast two-hybrid with systematic TPR mutagenesis and domain mapping, single lab, no in vivo Co-IP\",\n      \"pmids\": [\"20518486\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Mutation of FANCG TPR1, TPR2, TPR5, or TPR6 abolishes in vivo binding to BRCA2, XRCC3, FANCA, and FANCF, fails to restore FANCD2 monoubiquitylation, and fails to complement MMC and phleomycin hypersensitivity; FANCG functions as a mediator of protein-protein interactions essential for both FA core complex and D1-D2-G-X3 complex assembly.\",\n      \"method\": \"Co-immunoprecipitation of TPR mutants; FANCD2 monoubiquitylation assay; MMC/phleomycin sensitivity complementation\",\n      \"journal\": \"Mutation research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — systematic TPR mutagenesis with Co-IP and functional complementation for multiple interactions, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"20450923\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"FANCG is modified by K63-linked polyubiquitin chains in response to DNA damage; K63 ubiquitination of FANCG (at K182, K258, K347) is required for FANCG interaction with the Rap80-BRCA1 complex and for HR repair of ICLs; K63Ub-FANCG is dispensable for FANCD2 monoubiquitination; BRCC36 deubiquitinase removes K63Ub from FANCG in vitro and in vivo.\",\n      \"method\": \"Ubiquitin linkage-specific immunoblot; lysine-to-arginine mutagenesis (3KR); co-immunoprecipitation; BRCC36 inhibition; HR repair assay\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — linkage-specific ubiquitin detection, mutagenesis, Co-IP, and functional HR assay in single lab with multiple methods\",\n      \"pmids\": [\"25132264\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Cryo-EM structures of Xenopus laevis FANCA alone (3.35 and 3.46 Å) and two distinct FANCA-FANCG complexes (4.59 and 4.84 Å) reveal that FANCA CTD adopts an arc-shaped solenoid; FANCG makes independent contacts with either the FANCA C-terminal HEAT repeats or the N-terminal region; mutations disrupting either interaction prevent FANCA nuclear localization and FA pathway function.\",\n      \"method\": \"Cryo-electron microscopy structure determination; functional validation by nuclear localization assay\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — cryo-EM structure at near-atomic resolution combined with functional nuclear localization validation\",\n      \"pmids\": [\"32002546\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"An FANCG variant (p.Arg22Pro, c.65G>C) that loses mitochondrial localization retains nuclear DNA repair function and FANCD2 monoubiquitination but fails to protect mitochondria from oxidative stress; loss of mitochondrial FANCG causes transcriptional downregulation of frataxin (FXN) and resulting iron deficiency of the FANCJ helicase.\",\n      \"method\": \"Patient mutation analysis; subcellular fractionation/localization; FANCD2 monoubiquitination immunoblot; FXN expression analysis; FANCJ activity assay\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — defined patient mutation with subcellular fractionation, molecular pathway readouts, single lab\",\n      \"pmids\": [\"32989015\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Fancg deficiency causes abnormal primordial germ cell (PGC) migration in mouse embryos: Fancg-/- PGCs show increased random motility, delayed migration to genital ridges, increased cell death, and PGC attrition starting at E9.5; RAC1 inhibition mitigates the abnormal migratory pattern in Fancg-/- PGCs.\",\n      \"method\": \"Genetic mouse model; in vitro and in vivo PGC migration assays; RAC1 inhibitor treatment; immunofluorescence\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with specific cellular migration assay and pharmacological rescue, single lab\",\n      \"pmids\": [\"34368842\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Fancg is required for hematopoietic stem cell (HSC) quiescence, homing, and engraftment: Fancg-/- HSCs show reduced LSK compartment, loss of quiescence, impaired CXCL12-directed migration in vitro, and defective BM homing after transplantation; key genes involved in HSC self-renewal, quiescence, and migration are dysregulated in Fancg-/- LSK cells.\",\n      \"method\": \"Genetic KO mouse model; competitive transplantation assay; flow cytometry; in vitro migration assay; gene expression analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with competitive transplant and multiple functional readouts, single lab\",\n      \"pmids\": [\"21968513\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Loss of functional Fancg in mesenchymal stem/progenitor cells (MSPCs) causes defective MSPC proliferation and impaired ability to support hematopoietic stem cell (HSPC) adhesion and engraftment; transplantation of wild-type but not Fancg-/- MSPCs into Fancg-/- recipients restores HSPC engraftment and BM cellularity.\",\n      \"method\": \"Fancg-/- mouse model; in vitro MSPC-HSPC co-culture; tibial MSPC transplantation; BM reconstitution assay\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with in vivo transplantation rescue experiment, single lab\",\n      \"pmids\": [\"19129541\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"FANCG (identical to XRCC9) is a TPR-motif scaffold protein that acts as a core structural component of the FA nuclear core ubiquitin ligase complex: it directly binds FANCA (via an arginine-rich FANCA motif and FANCG TPR motifs), stabilizes FANCA and promotes nuclear import of the complex, and its C-terminus is additionally required to recruit FANCC; the assembled core complex is required for damage-induced monoubiquitination of FANCD2, which activates downstream DNA repair; independently of core complex function, FANCG also participates in a discrete D1-D2-G-X3 complex (with BRCA2/FANCD1, FANCD2, and XRCC3) whose assembly requires phosphorylation of FANCG at Ser7 and is important for homologous recombination repair of interstrand crosslinks; FANCG is further phosphorylated at Ser383/387 by Cdc2 during mitosis, undergoes K63-linked polyubiquitination that enables interaction with the Rap80-BRCA1 complex for HR repair, and interacts with the ERCC1-XPF endonuclease (via TPRs 1, 3, 5, 6) to link the FA pathway to the ICL unhooking step; a mitochondrial pool of FANCG protects against oxidative stress and supports FANCJ helicase iron-sulfur cluster integrity.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"FANCG (identical to XRCC9) is a tetratricopeptide-repeat (TPR) scaffold protein of the Fanconi anemia (FA) DNA-repair pathway, originally identified by its ability to complement the mitomycin C-, cisplatin-, and crosslink-hypersensitive phenotype and chromosomal instability of FA-G cells [#0, #1]. Within the FA nuclear core complex, FANCG directly binds FANCA through an arginine-rich motif at the FANCA N-terminus and its own C-terminal/TPR contact surfaces, mutually stabilizing the two proteins, promoting nuclear import of the complex, and additionally recruiting FANCC via its C-terminus [#2, #4, #6, #7]; cryo-EM of the FANCA-FANCG complex shows FANCG making independent contacts with the FANCA N-terminal region and C-terminal HEAT solenoid, both required for FANCA nuclear localization [#25]. Its TPR motifs (notably TPR1, 2, 5, 6) constitute the protein-protein interaction scaffold needed for assembly of both the core complex and downstream complexes [#15, #23]. The assembled core complex is required for damage-induced monoubiquitination of FANCD2, the central activating event of the pathway [#9, #10]. Independently of core-complex function, FANCG nucleates a discrete D1-D2-G-X3 complex with BRCA2/FANCD1, FANCD2, and the RAD51 paralog XRCC3, an assembly that depends on phosphorylation of FANCG at Ser7 and supports homologous-recombination repair of interstrand crosslinks [#13, #19, #20], consistent with FANCG being required for efficient HR repair of double-strand breaks [#14]. FANCG is further phosphorylated at Ser383/Ser387 by Cdc2 during mitosis [#17] and modified by K63-linked polyubiquitin chains that recruit the Rap80-BRCA1 complex for HR repair while being dispensable for FANCD2 monoubiquitination [#24], and it links the pathway to the ERCC1-XPF endonuclease that performs ICL unhooking through its TPR motifs [#22]. A mitochondrial pool of FANCG, separable from its nuclear repair function, protects against oxidative stress and supports FANCJ helicase iron-sulfur integrity via frataxin [#26].\",\n  \"teleology\": [\n    {\n      \"year\": 1998,\n      \"claim\": \"Establishing that the FANCG disease gene is identical to XRCC9 connected an uncharacterized FA complementation group to a known crosslink-repair locus.\",\n      \"evidence\": \"Complementation of FA-G cells with mutation identification, and XRCC9 cDNA correction of CHO UV40 cells across multiple genotoxins with cytogenetic readouts\",\n      \"pmids\": [\"9806548\", \"9256465\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define the molecular activity of the protein\", \"Placed FANCG in postreplication repair/checkpoint without a mechanism\"]\n    },\n    {\n      \"year\": 1999,\n      \"claim\": \"Identifying FANCG as a binding partner that bridges FANCA and FANCC revealed it as a structural component of a nuclear FA protein complex rather than a standalone enzyme.\",\n      \"evidence\": \"Reciprocal co-immunoprecipitation, nuclear fractionation, and complementation across FA group cell lines; domain mapping placed the contact at FANCA aa 18-29 and non-contiguous FANCG C-terminal regions\",\n      \"pmids\": [\"10373536\", \"10468606\", \"10567393\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not establish the catalytic output of the assembled complex\", \"Interaction surfaces mapped functionally but not structurally\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Demonstrating mutual FANCA/FANCG stabilization, NLS binding, and a distinct C-terminal FANCC-recruitment requirement explained how FANCG controls assembly and nuclear delivery of the FA complex.\",\n      \"evidence\": \"Pulse-chase stability assays, yeast two-hybrid, truncation mutants, and co-IP with FANCF incorporation into the nuclear complex\",\n      \"pmids\": [\"11050007\", \"10961856\", \"10627486\", \"11063725\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of nuclear import beyond FANCA NLS binding unresolved\", \"Stoichiometry of the core complex not defined\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Linking FANCG loss to failed FANCD2 monoubiquitination placed FANCG functionally upstream of the pathway's central activation switch.\",\n      \"evidence\": \"FANCD2 isoform immunoblotting in FANCG-deficient CHO mutants and Fancg-knockout mouse lymphocytes with complementation/IR controls\",\n      \"pmids\": [\"11751423\", \"11719385\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not identify the ubiquitin ligase acting on FANCD2\", \"Did not explain how the core complex enables monoubiquitination mechanistically\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Discovery of direct FANCG-BRCA2 binding and an HR repair defect in FANCG-null cells connected the FA core protein to homologous recombination effectors.\",\n      \"evidence\": \"Yeast two-hybrid, co-IP, MMC-induced focus co-localization with BRCA2/RAD51, and quantitative I-SceI HR assay in DT40 knockouts\",\n      \"pmids\": [\"12915460\", \"12861027\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not resolve whether BRCA2 interaction was within or outside the core complex\", \"HR mechanism downstream of FANCG not defined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Defining the TPR scaffold and identifying functional phosphorylation sites (Ser7; Ser383/387 by Cdc2) separated FANCG's binding architecture from regulatory inputs controlling its activity.\",\n      \"evidence\": \"TPR mutagenesis with complementation/binding readouts; in vitro kinase assays, mass spectrometry, phospho-specific antibodies, and S7A/S383A/S387A mutants with functional complementation\",\n      \"pmids\": [\"14697762\", \"15299017\", \"15367677\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Kinase responsible for Ser7 phosphorylation not identified\", \"Functional consequence of mitotic Ser383/387 phosphorylation at the pathway level incomplete\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Defining the Ser7-dependent D1-D2-G-X3 complex established a core-complex-independent role for FANCG in coupling FANCD2 and BRCA2 with XRCC3 for crosslink HR repair.\",\n      \"evidence\": \"Co-IP requiring FANCG (not other core proteins) for BRCA2-FANCD2 co-precipitation, S7A phospho-mutant analysis, XRCC3 interaction via patient mutation L71P, and FANCG/XRCC3 epistasis in DT40\",\n      \"pmids\": [\"18212739\", \"16621732\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of the D1-D2-G-X3 complex unknown\", \"How Ser7 phosphorylation drives complex assembly mechanistically unresolved\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Systematic TPR mutagenesis showed FANCG TPR motifs mediate both core-complex and D1-D2-G-X3 assembly and additionally tether the ERCC1-XPF unhooking endonuclease, casting FANCG as a multi-complex interaction hub.\",\n      \"evidence\": \"TPR1/2/5/6 mutant co-IP against BRCA2, XRCC3, FANCA, FANCF with FANCD2 monoubiquitylation and MMC/phleomycin complementation; yeast two-hybrid and domain mapping of direct ERCC1/XPF binding\",\n      \"pmids\": [\"20450923\", \"20518486\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"ERCC1-XPF interaction lacks in vivo co-IP validation\", \"How a single scaffold partitions among distinct complexes is unknown\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identifying DNA-damage-induced K63-linked polyubiquitination of FANCG that recruits Rap80-BRCA1 added a post-translational layer routing FANCG to HR repair separable from FANCD2 monoubiquitination.\",\n      \"evidence\": \"Linkage-specific ubiquitin immunoblot, 3KR (K182/K258/K347) mutagenesis, co-IP with Rap80-BRCA1, BRCC36 deubiquitinase assays, and HR repair assay\",\n      \"pmids\": [\"25132264\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Ubiquitin ligase that adds K63 chains to FANCG not identified\", \"Timing relative to other FANCG modifications unresolved\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"A near-atomic cryo-EM model of the FANCA-FANCG complex provided the structural basis for how FANCG drives FANCA nuclear localization, and a mitochondrial-deficient variant revealed a repair-independent FANCG function in oxidative protection.\",\n      \"evidence\": \"Cryo-EM of Xenopus FANCA and FANCA-FANCG with nuclear-localization validation; patient variant p.Arg22Pro analysis with FANCD2 monoubiquitination, FXN expression, and FANCJ activity readouts\",\n      \"pmids\": [\"32002546\", \"32989015\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No high-resolution structure of the full core complex\", \"Mechanism by which mitochondrial FANCG regulates frataxin transcription unknown\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Mouse models extended FANCG function to developmental and stem-cell contexts—germ cell migration and hematopoietic/mesenchymal stem cell maintenance—beyond DNA crosslink repair.\",\n      \"evidence\": \"Fancg-knockout mouse PGC migration assays with RAC1 inhibitor rescue; competitive transplantation, homing/quiescence and CXCL12 migration assays for HSCs; MSPC co-culture and transplantation rescue\",\n      \"pmids\": [\"34368842\", \"21968513\", \"19129541\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether these phenotypes derive from DNA-repair failure or a separable function is unresolved\", \"Direct molecular link between FANCG and RAC1/CXCL12 signaling not established\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How a single TPR scaffold dynamically partitions among the FA core complex, the D1-D2-G-X3 HR complex, the ERCC1-XPF unhooking machinery, and a mitochondrial pool—and what governs the switch between these states—remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structure of FANCG within the assembled multi-protein complexes\", \"Regulatory hierarchy among Ser7/Ser383/387 phosphorylation and K63 ubiquitination unknown\", \"Mechanism coordinating nuclear versus mitochondrial FANCG pools undefined\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [2, 7, 15, 23]},\n      {\"term_id\": \"GO:0005198\", \"supporting_discovery_ids\": [2, 15, 25]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [2, 3, 6]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [3, 12]},\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [26]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-73894\", \"supporting_discovery_ids\": [9, 14, 20, 24]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [0, 1, 26]}\n    ],\n    \"complexes\": [\"FA nuclear core complex\", \"D1-D2-G-X3 complex\"],\n    \"partners\": [\"FANCA\", \"FANCC\", \"FANCF\", \"BRCA2\", \"XRCC3\", \"FANCD2\", \"ERCC1\", \"XPF\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}