{"gene":"POLA1","run_date":"2026-06-10T06:43:35","timeline":{"discoveries":[{"year":2021,"finding":"POLA1 encodes the catalytic subunit of DNA polymerase alpha, which together with the Primase complex initiates DNA replication. A recurrent intronic mutation causing missplicing of POLA1 underlies X-linked reticulate pigmentary disorder (XLPDR), which is accompanied by profound activation of type I interferon signaling and marked Natural Killer (NK) cell dysfunction, establishing that partial POLA1 deficiency drives an interferonopathy with specific immune cell impairment.","method":"Human genetic analysis of XLPDR patients combined with functional immunological characterization (NK cell functional assays, interferon pathway activation measurements)","journal":"Journal of clinical immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — human genetics plus functional immune assays in a single review synthesizing multiple studies; mechanistic link between missplicing and IFN activation established across multiple cases but reviewed rather than primary data","pmids":["33392852"],"is_preprint":false},{"year":2023,"finding":"SNRPB silencing induces skipping of exon 3 of POLA1, which generates a premature termination codon and triggers nonsense-mediated RNA decay (NMD) of POLA1 mRNA, thereby reducing POLA1 protein levels and impairing DNA replication. POLA1 knockdown partially reversed the increased malignancy conferred by SNRPB overexpression in ovarian cancer cells, placing POLA1 downstream of SNRPB in this splicing-regulated pathway.","method":"RNA-seq and RT-PCR to detect exon skipping; siRNA knockdown of SNRPB with rescue experiments; NMD demonstrated by cycloheximide treatment; POLA1 knockdown epistasis in SNRPB-overexpressing cells","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal molecular methods (RNA-seq, RT-PCR, siRNA, rescue) in a single lab establishing the splicing-NMD mechanism for POLA1 regulation","pmids":["37391593"],"is_preprint":false},{"year":2024,"finding":"POLA1 and ATR exhibit synthetic lethality: ATR-deficient cancer cells show markedly increased sensitivity to chemical POLA1 inhibition or siRNA-mediated POLA1 depletion, with cell death involving S-phase arrest and apoptosis. Conversely, siRNA-mediated POLA1 depletion sensitizes cancer cells to ATR and CHK1 inhibitors, establishing POLA1 as a functional partner of the ATR-CHK1 DNA damage response pathway.","method":"ATR-deficient DLD-1 cell model; chemical POLA1 inhibition; siRNA-mediated POLA1 knockdown; FACS-based cell cycle and apoptosis analysis; Western blotting for apoptotic markers","journal":"Neoplasia","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — two orthogonal approaches (chemical inhibition and siRNA) in ATR-deficient cells plus reciprocal sensitization experiments, single lab","pmids":["39128273"],"is_preprint":false},{"year":2021,"finding":"POLA1 has primer extension (DNA polymerase) activity that can be inhibited by small-molecule dual POLA1-HDAC11 inhibitors (MIR002, GEM144). Inhibition of POLA1 in immunocompetent mice significantly upregulated interferon-alpha, consistent with the model that reduced POLA1 activity promotes type I interferon induction.","method":"In vitro POLA1 primer extension functional assay; molecular docking; in vivo xenograft models; IFN-alpha ELISA in immunocompetent mice after POLA1 inhibitor treatment","journal":"European journal of medicinal chemistry","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — in vitro enzymatic assay confirming primer extension activity plus in vivo IFN induction upon POLA1 inhibition; single lab with multiple orthogonal methods","pmids":["34772529"],"is_preprint":false},{"year":2022,"finding":"Heterozygous deletion of POLA1 in females with skewed X-inactivation results in subfertility as the only phenotype, while hemizygous POLA1 nullisomy in males is inferred to cause very early embryonic lethality, demonstrating that complete absence of POLA1 function is incompatible with viability.","method":"Clinical and genomic characterization of a three-generation family with Xp22.11-p21.3 microdeletion encompassing POLA1; X-inactivation skewing analysis; reproductive outcome tracking across generations","journal":"European journal of medical genetics","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single family report, indirect inference of male lethality from absence of affected males; no direct cellular or biochemical mechanism demonstrated","pmids":["36182037"],"is_preprint":false}],"current_model":"POLA1 encodes the catalytic subunit of DNA polymerase alpha, an enzyme essential for initiating DNA replication in concert with the primase complex; partial loss-of-function mutations cause X-linked reticulate pigmentary disorder (XLPDR) or Van Esch-O'Driscoll syndrome (VEODS) with type I interferon activation and NK cell dysfunction, POLA1 expression is post-transcriptionally regulated by SNRPB-dependent exon 3 inclusion (loss causes NMD), POLA1 function is synthetically lethal with ATR/CHK1 pathway activity, and complete POLA1 nullisomy is likely lethal in males."},"narrative":{"mechanistic_narrative":"POLA1 encodes the catalytic subunit of DNA polymerase alpha, which together with the primase complex initiates DNA replication, and which possesses intrinsic primer extension (DNA polymerase) activity demonstrable in vitro [PMID:33392852, PMID:34772529]. Partial loss-of-function caused by a recurrent intronic mutation that misspices POLA1 underlies X-linked reticulate pigmentary disorder (XLPDR), an interferonopathy marked by profound type I interferon activation and Natural Killer cell dysfunction [PMID:33392852]; consistent with this, pharmacologic inhibition of POLA1 upregulates interferon-alpha in immunocompetent mice, linking reduced POLA1 activity to type I interferon induction [PMID:34772529]. POLA1 abundance is set post-transcriptionally: SNRPB promotes inclusion of POLA1 exon 3, and SNRPB silencing drives exon skipping that introduces a premature termination codon, triggering nonsense-mediated decay and lowering POLA1 protein, an axis that contributes to SNRPB-driven malignancy in ovarian cancer cells [PMID:37391593]. Functionally, POLA1 operates alongside the ATR-CHK1 DNA damage response: it is synthetically lethal with ATR loss, and its depletion sensitizes cells to ATR and CHK1 inhibition through S-phase arrest and apoptosis [PMID:39128273]. Complete absence of POLA1 is incompatible with viability, with heterozygous deletion in females producing subfertility and hemizygous nullisomy inferred to be embryonic lethal in males [PMID:36182037].","teleology":[{"year":2021,"claim":"Established that partial POLA1 deficiency is not merely a replication defect but drives a defined human interferonopathy, connecting a core replication enzyme to innate immune dysregulation.","evidence":"Human genetic analysis of XLPDR patients with NK cell functional assays and interferon pathway measurements","pmids":["33392852"],"confidence":"Medium","gaps":["Molecular trigger linking reduced POLA1 to type I interferon induction not defined","Why NK cells are selectively impaired not established","Reviewed synthesis rather than single primary dataset"]},{"year":2021,"claim":"Confirmed POLA1 intrinsic primer extension catalytic activity in vitro and showed that inhibiting this activity induces interferon-alpha in vivo, providing a causal link between POLA1 enzymatic output and interferon induction.","evidence":"In vitro POLA1 primer extension assay, molecular docking, and IFN-alpha ELISA in immunocompetent mice treated with dual POLA1-HDAC11 inhibitors","pmids":["34772529"],"confidence":"Medium","gaps":["Dual POLA1-HDAC11 inhibitors confound attribution of IFN effect to POLA1 alone","Downstream sensor coupling reduced polymerase activity to IFN not identified"]},{"year":2022,"claim":"Defined the viability requirement for POLA1, distinguishing tolerated partial loss from lethal complete loss and explaining the X-linked inheritance pattern.","evidence":"Clinical and genomic characterization of a three-generation family with Xp22.11-p21.3 microdeletion plus X-inactivation skewing analysis","pmids":["36182037"],"confidence":"Low","gaps":["Single family report with male lethality inferred from absence of affected males, not directly demonstrated","Deletion spans additional genes beyond POLA1","No cellular or biochemical mechanism for the subfertility phenotype"]},{"year":2023,"claim":"Revealed that POLA1 protein level is controlled post-transcriptionally by splicing, placing it downstream of an SNRPB-regulated exon-inclusion/NMD axis relevant to cancer malignancy.","evidence":"RNA-seq, RT-PCR, siRNA knockdown with rescue, cycloheximide NMD assay, and POLA1 knockdown epistasis in SNRPB-overexpressing ovarian cancer cells","pmids":["37391593"],"confidence":"Medium","gaps":["Single lab and single cancer context","Whether this splicing axis operates in normal tissues not addressed"]},{"year":2024,"claim":"Positioned POLA1 as a functional partner of the ATR-CHK1 replication stress response, identifying a synthetic-lethal vulnerability with therapeutic potential.","evidence":"ATR-deficient DLD-1 model with chemical and siRNA POLA1 depletion, reciprocal sensitization to ATR/CHK1 inhibitors, and FACS cell-cycle/apoptosis analysis","pmids":["39128273"],"confidence":"Medium","gaps":["Single cell-line context","Mechanistic basis of the synthetic lethality (replication catastrophe vs checkpoint loss) not resolved"]},{"year":null,"claim":"The molecular mechanism coupling reduced POLA1 polymerase activity to type I interferon sensing and to selective NK cell impairment remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No identified nucleic acid sensor linking POLA1 deficiency to IFN","No structural model of POLA1 in the primase-polymerase initiation complex in this corpus","Cell-type basis of immune phenotypes uncharacterized"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140097","term_label":"catalytic activity, acting on DNA","supporting_discovery_ids":[0,3]}],"localization":[],"pathway":[{"term_id":"R-HSA-69306","term_label":"DNA Replication","supporting_discovery_ids":[0,2]}],"complexes":["DNA polymerase alpha-primase"],"partners":["SNRPB","ATR","CHK1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P09884","full_name":"DNA polymerase alpha catalytic subunit","aliases":["DNA polymerase alpha catalytic subunit p180"],"length_aa":1462,"mass_kda":165.9,"function":"Catalytic subunit of the DNA polymerase alpha complex (also known as the alpha DNA polymerase-primase complex) which plays an essential role in the initiation of DNA synthesis. During the S phase of the cell cycle, the DNA polymerase alpha complex (composed of a catalytic subunit POLA1, a regulatory subunit POLA2 and two primase subunits PRIM1 and PRIM2) is recruited to DNA at the replicative forks via direct interactions with MCM10 and WDHD1. The primase subunit of the polymerase alpha complex initiates DNA synthesis by oligomerising short RNA primers on both leading and lagging strands. These primers are initially extended by the polymerase alpha catalytic subunit and subsequently transferred to polymerase delta and polymerase epsilon for processive synthesis on the lagging and leading strand, respectively. The reason this transfer occurs is because the polymerase alpha has limited processivity and lacks intrinsic 3' exonuclease activity for proofreading error, and therefore is not well suited for replicating long complexes. In the cytosol, responsible for a substantial proportion of the physiological concentration of cytosolic RNA:DNA hybrids, which are necessary to prevent spontaneous activation of type I interferon responses (PubMed:27019227)","subcellular_location":"Nucleus; Cytoplasm, cytosol","url":"https://www.uniprot.org/uniprotkb/P09884/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/POLA1","classification":"Common Essential","n_dependent_lines":1066,"n_total_lines":1208,"dependency_fraction":0.8824503311258278},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"SSRP1","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/POLA1","total_profiled":1310},"omim":[{"mim_id":"620063","title":"DNA POLYMERASE ALPHA-2, ACCESSORY SUBUNIT; POLA2","url":"https://www.omim.org/entry/620063"},{"mim_id":"618030","title":"SHIELD COMPLEX, SUBUNIT 3; SHLD3","url":"https://www.omim.org/entry/618030"},{"mim_id":"618029","title":"SHIELD COMPLEX, SUBUNIT 2; SHLD2","url":"https://www.omim.org/entry/618029"},{"mim_id":"618028","title":"SHIELD COMPLEX, SUBUNIT 1; SHLD1","url":"https://www.omim.org/entry/618028"},{"mim_id":"614539","title":"HELICASE, DNA, B; HELB","url":"https://www.omim.org/entry/614539"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in many","driving_tissues":[],"url":"https://www.proteinatlas.org/search/POLA1"},"hgnc":{"alias_symbol":["p180"],"prev_symbol":["POLA","NSX"]},"alphafold":{"accession":"P09884","domains":[{"cath_id":"2.40.50.730","chopping":"332-383_497-529","consensus_level":"medium","plddt":91.7438,"start":332,"end":529},{"cath_id":"3.30.420.10","chopping":"538-760","consensus_level":"high","plddt":91.2271,"start":538,"end":760},{"cath_id":"3.90.1600.10","chopping":"761-809_899-969","consensus_level":"medium","plddt":90.9475,"start":761,"end":969},{"cath_id":"3.90.1600.10","chopping":"841-863_971-1077","consensus_level":"medium","plddt":91.9208,"start":841,"end":1077},{"cath_id":"1.10.132.60","chopping":"1087-1242","consensus_level":"high","plddt":89.1483,"start":1087,"end":1242},{"cath_id":"1.10.3200.20","chopping":"1254-1345_1383-1456","consensus_level":"high","plddt":83.6034,"start":1254,"end":1456}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P09884","model_url":"https://alphafold.ebi.ac.uk/files/AF-P09884-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P09884-F1-predicted_aligned_error_v6.png","plddt_mean":75.81},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=POLA1","jax_strain_url":"https://www.jax.org/strain/search?query=POLA1"},"sequence":{"accession":"P09884","fasta_url":"https://rest.uniprot.org/uniprotkb/P09884.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P09884/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P09884"}},"corpus_meta":[{"pmid":"6233260","id":"PMC_6233260","title":"Method for determining whether a gene of Escherichia coli is essential: application to the polA gene.","date":"1984","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/6233260","citation_count":234,"is_preprint":false},{"pmid":"164624","id":"PMC_164624","title":"Comparative analysis of deletion and base-change mutabilities of Escherichia coli B strains differing in DNA repair capacity (wild-type, uvrA-, polA-, recA-) by various mutagens.","date":"1975","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/164624","citation_count":155,"is_preprint":false},{"pmid":"6276402","id":"PMC_6276402","title":"Nucleotide sequence of the Escherichia coli polA gene and primary structure of DNA polymerase I.","date":"1982","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/6276402","citation_count":154,"is_preprint":false},{"pmid":"12794064","id":"PMC_12794064","title":"POLN, a nuclear PolA family DNA polymerase homologous to the DNA cross-link sensitivity protein Mus308.","date":"2003","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/12794064","citation_count":94,"is_preprint":false},{"pmid":"10532448","id":"PMC_10532448","title":"Age-related macular degeneration and antioxidant status in the POLA study. 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replication ability.","date":"1990","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/2205534","citation_count":17,"is_preprint":false},{"pmid":"23204468","id":"PMC_23204468","title":"PolA1, a putative DNA polymerase I, is coexpressed with PerR and contributes to peroxide stress defenses of group A Streptococcus.","date":"2012","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/23204468","citation_count":16,"is_preprint":false},{"pmid":"7037745","id":"PMC_7037745","title":"Powerful mutator activity of the polA1 mutation within the histidine region of Escherichia coli K-12.","date":"1982","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/7037745","citation_count":16,"is_preprint":false},{"pmid":"16005896","id":"PMC_16005896","title":"Escherichia coli mutator (Delta)polA is defective in base mismatch correction: the nature of in vivo DNA replication errors.","date":"2005","source":"Journal of molecular 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The role of the polA and recA gene products.","date":"1986","source":"Biophysical journal","url":"https://pubmed.ncbi.nlm.nih.gov/3513859","citation_count":15,"is_preprint":false},{"pmid":"3125407","id":"PMC_3125407","title":"Complementation of Bacillus subtilis polA mutants by DNA polymerase I from Streptococcus pneumoniae.","date":"1987","source":"Molecular & general genetics : MGG","url":"https://pubmed.ncbi.nlm.nih.gov/3125407","citation_count":15,"is_preprint":false},{"pmid":"8294019","id":"PMC_8294019","title":"A PCR method for the sequence analysis of the gyrA, polA and rnhA gene segments from mycobacteria.","date":"1993","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/8294019","citation_count":15,"is_preprint":false},{"pmid":"6088498","id":"PMC_6088498","title":"Escherichia coli DNA polymerase I. Construction of a polA plasmid for amplification and an improved purification scheme.","date":"1984","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/6088498","citation_count":14,"is_preprint":false},{"pmid":"6445899","id":"PMC_6445899","title":"Construction and characterization of Escherichia coli polA-lacZ gene fusions.","date":"1980","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/6445899","citation_count":14,"is_preprint":false},{"pmid":"39907880","id":"PMC_39907880","title":"Real-world effectiveness and safety of rituximab and reduced-dose CHP with polatuzumab vedotin (pola-R-CHP) in patients aged > 80 years with diffuse large B-cell lymphoma: a retrospective analysis.","date":"2025","source":"Blood research","url":"https://pubmed.ncbi.nlm.nih.gov/39907880","citation_count":13,"is_preprint":false},{"pmid":"10441470","id":"PMC_10441470","title":"DNA sequence analysis of spontaneous tonB deletion mutations in a polA1 strain of Escherichia coli K12.","date":"1999","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/10441470","citation_count":13,"is_preprint":false},{"pmid":"32920362","id":"PMC_32920362","title":"Novel adamantyl retinoid-related molecules with POLA1 inhibitory activity.","date":"2020","source":"Bioorganic chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/32920362","citation_count":12,"is_preprint":false},{"pmid":"34772529","id":"PMC_34772529","title":"Antitumor activity of novel POLA1-HDAC11 dual inhibitors.","date":"2021","source":"European journal of medicinal chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/34772529","citation_count":11,"is_preprint":false},{"pmid":"3037366","id":"PMC_3037366","title":"Frameshift mutagenesis by nitracrine analogues in wild-type, uvrB, polA and recA strains of Salmonella typhimurium, with and without plasmid pKM101.","date":"1987","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/3037366","citation_count":11,"is_preprint":false},{"pmid":"8419292","id":"PMC_8419292","title":"Suppression of ColE1 high-copy-number mutants by mutations in the polA gene of Escherichia coli.","date":"1993","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/8419292","citation_count":11,"is_preprint":false},{"pmid":"2820948","id":"PMC_2820948","title":"Streptococcus pneumoniae polA gene is expressed in Escherichia coli and can functionally substitute for the E. coli polA gene.","date":"1987","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/2820948","citation_count":11,"is_preprint":false},{"pmid":"787765","id":"PMC_787765","title":"Mapping of the polA locus of Escherichia coli K12: orientation in the amino- and carboxy-termini of the cistron.","date":"1976","source":"Molecular & general genetics : MGG","url":"https://pubmed.ncbi.nlm.nih.gov/787765","citation_count":11,"is_preprint":false},{"pmid":"39908481","id":"PMC_39908481","title":"Mosunetuzumab plus Pola-CHP compared with Pola-R-CHP in previously untreated DLBCL: final results from a phase 2 study.","date":"2025","source":"Blood advances","url":"https://pubmed.ncbi.nlm.nih.gov/39908481","citation_count":10,"is_preprint":false},{"pmid":"28399709","id":"PMC_28399709","title":"Treponema pallidum ssp. pallidum identification by real-time PCR targetting the polA gene in paraffin-embedded samples positive by immunohistochemistry.","date":"2017","source":"International journal of STD & AIDS","url":"https://pubmed.ncbi.nlm.nih.gov/28399709","citation_count":10,"is_preprint":false},{"pmid":"6176674","id":"PMC_6176674","title":"Plasmid R46-mediated protection against bleomycin is poLA+-dependent.","date":"1982","source":"Journal of general microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/6176674","citation_count":9,"is_preprint":false},{"pmid":"4576410","id":"PMC_4576410","title":"Comparison of the resA1 and polA1 mutations in isogenic strains of Escherichia coli K-12.","date":"1973","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/4576410","citation_count":8,"is_preprint":false},{"pmid":"6379434","id":"PMC_6379434","title":"Biological effects of dyes on bacteria. VI. Mutation induction by acridine orange and methylene blue in the dark with special reference to Escherichia coli WP6 (polA1).","date":"1984","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/6379434","citation_count":8,"is_preprint":false},{"pmid":"25045589","id":"PMC_25045589","title":"Safeguarding Stem Cell-Based Regenerative Therapy against Iatrogenic Cancerogenesis: Transgenic Expression of DNASE1, DNASE1L3, DNASE2, DFFB Controlled By POLA1 Promoter in Proliferating and Directed Differentiation Resisting Human Autologous Pluripotent Induced Stem Cells Leads to their Death.","date":"2013","source":"Journal of stem cell research & therapy","url":"https://pubmed.ncbi.nlm.nih.gov/25045589","citation_count":8,"is_preprint":false},{"pmid":"35205662","id":"PMC_35205662","title":"Phase 2 Trial (POLA Study) of Lurbinectedin plus Olaparib in Patients with Advanced Solid Tumors: Results of Efficacy, Tolerability, and the Translational Study.","date":"2022","source":"Cancers","url":"https://pubmed.ncbi.nlm.nih.gov/35205662","citation_count":8,"is_preprint":false},{"pmid":"40532125","id":"PMC_40532125","title":"Glofitamab Combined With Pola-R-CHP or R-CHOP as First Therapy in Younger Patients With High-Risk Large B-Cell Lymphoma: Results From the COALITION Study.","date":"2025","source":"Journal of clinical oncology : official journal of the American Society of Clinical Oncology","url":"https://pubmed.ncbi.nlm.nih.gov/40532125","citation_count":7,"is_preprint":false},{"pmid":"30726292","id":"PMC_30726292","title":"YwqL (EndoV), ExoA and PolA act in a novel alternative excision pathway to repair deaminated DNA bases in Bacillus subtilis.","date":"2019","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/30726292","citation_count":7,"is_preprint":false},{"pmid":"37188351","id":"PMC_37188351","title":"Cost-effectiveness of polatuzumab vedotin in combination with chemoimmunotherapy (pola-R-CHP) in previously untreated diffuse large B-cell lymphoma in Germany.","date":"2023","source":"British journal of haematology","url":"https://pubmed.ncbi.nlm.nih.gov/37188351","citation_count":7,"is_preprint":false},{"pmid":"38310754","id":"PMC_38310754","title":"Navigating between Scylla and Charybdis: A roadmap to do better than Pola-RCHP in DLBCL.","date":"2024","source":"Cancer treatment reviews","url":"https://pubmed.ncbi.nlm.nih.gov/38310754","citation_count":6,"is_preprint":false},{"pmid":"8020959","id":"PMC_8020959","title":"Identification of YAC and cosmid clones encompassing the ZFX-POLA region using irradiation hybrid cell lines.","date":"1994","source":"Genomics","url":"https://pubmed.ncbi.nlm.nih.gov/8020959","citation_count":6,"is_preprint":false},{"pmid":"36428602","id":"PMC_36428602","title":"Characteristics, Patterns of Care and Predictive Geriatric Factors in Elderly Patients Treated for High-Grade IDH-Mutant Gliomas: A French POLA Network Study.","date":"2022","source":"Cancers","url":"https://pubmed.ncbi.nlm.nih.gov/36428602","citation_count":6,"is_preprint":false},{"pmid":"39128273","id":"PMC_39128273","title":"Synthetic lethality between ATR and POLA1 reveals a potential new target for individualized cancer therapy.","date":"2024","source":"Neoplasia (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/39128273","citation_count":5,"is_preprint":false},{"pmid":"40377673","id":"PMC_40377673","title":"Polatuzumab Vedotin, zanubrutinib and rituximab (Pola-ZR) achieved rapid and deep response in untreated frail and elderly DLBCL.","date":"2025","source":"Annals of hematology","url":"https://pubmed.ncbi.nlm.nih.gov/40377673","citation_count":5,"is_preprint":false},{"pmid":"8190065","id":"PMC_8190065","title":"Isolation of a DNA polymerase I (polA) mutant of Rhizobium leguminosarum that has significantly reduced levels of an IncQ-group plasmid.","date":"1994","source":"Molecular & general genetics : MGG","url":"https://pubmed.ncbi.nlm.nih.gov/8190065","citation_count":5,"is_preprint":false},{"pmid":"10192922","id":"PMC_10192922","title":"fcsA29 mutation is an allele of polA gene of Escherichia coli.","date":"1999","source":"Bioscience, biotechnology, and biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/10192922","citation_count":5,"is_preprint":false},{"pmid":"36564489","id":"PMC_36564489","title":"HslO ameliorates arrested ΔrecA polA cell growth and reduces DNA damage and oxidative stress responses.","date":"2022","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/36564489","citation_count":4,"is_preprint":false},{"pmid":"35705748","id":"PMC_35705748","title":"Reactive oxygen species accumulation is synchronised with growth inhibition of temperature-sensitive recAts polA Escherichia coli.","date":"2022","source":"Archives of microbiology","url":"https://pubmed.ncbi.nlm.nih.gov/35705748","citation_count":4,"is_preprint":false},{"pmid":"24867580","id":"PMC_24867580","title":"Malnutrition and retinal vascular caliber in the elderly: the POLA study.","date":"2014","source":"Investigative ophthalmology & visual science","url":"https://pubmed.ncbi.nlm.nih.gov/24867580","citation_count":4,"is_preprint":false},{"pmid":"6256261","id":"PMC_6256261","title":"[Relation between Escherichia coli K-12 viability and mutability and the balance between DNA and protein synthesis. III. Relation between disruptions in the balance between DNA and protein synthesis and mutagenesis and viability during thymidine deprivation of thy- cells defective with respect to recB and polA genes].","date":"1980","source":"Genetika","url":"https://pubmed.ncbi.nlm.nih.gov/6256261","citation_count":4,"is_preprint":false},{"pmid":"35807041","id":"PMC_35807041","title":"BeEAM High-Dose Chemotherapy with Polatuzumab (Pola-BeEAM) before ASCT in Patients with DLBCL-A Pilot Study.","date":"2022","source":"Journal of clinical medicine","url":"https://pubmed.ncbi.nlm.nih.gov/35807041","citation_count":4,"is_preprint":false},{"pmid":"1091300","id":"PMC_1091300","title":"Excision of pyrimidine dimers in normal and T4-infected Escherichia coli: effect of polA and other mutations.","date":"1975","source":"Biochimica et biophysica acta","url":"https://pubmed.ncbi.nlm.nih.gov/1091300","citation_count":4,"is_preprint":false},{"pmid":"9073067","id":"PMC_9073067","title":"The RLEP-flanked polA gene from Mycobacterium leprae is not transcribed in Mycobacterium smegmatis.","date":"1997","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/9073067","citation_count":4,"is_preprint":false},{"pmid":"7035922","id":"PMC_7035922","title":"The effects of mutations in the polA and recA genes on mutagenesis by nitrosoguanidine in Salmonella typhimurium.","date":"1981","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/7035922","citation_count":4,"is_preprint":false},{"pmid":"39832983","id":"PMC_39832983","title":"Is first-line treatment with polatuzumab vedotin-rituximab-cyclophosphamide, doxorubicin and prednisone (pola-R-CHP) for previously untreated diffuse large B-cell lymphoma cost-effective in China? A cost-effectiveness analysis using a Markov model.","date":"2025","source":"BMJ open","url":"https://pubmed.ncbi.nlm.nih.gov/39832983","citation_count":3,"is_preprint":false},{"pmid":"41068304","id":"PMC_41068304","title":"Polatuzumab vedotin, rituximab, cyclophosphamide, doxorubicin, and prednisone (Pola-R-CHP) therapy in diffuse large B-cell lymphoma in patients aged 80 years or older: a real-world study.","date":"2025","source":"Annals of hematology","url":"https://pubmed.ncbi.nlm.nih.gov/41068304","citation_count":3,"is_preprint":false},{"pmid":"9108296","id":"PMC_9108296","title":"Treatment with DNA-damaging agents increases expression of polA'-'lacZ gene fusions in Escherichia coli K-12.","date":"1997","source":"Molecular & general genetics : MGG","url":"https://pubmed.ncbi.nlm.nih.gov/9108296","citation_count":3,"is_preprint":false},{"pmid":"24177812","id":"PMC_24177812","title":"Plasmid cloning and expression of the E. coli polA (+) gene in S. cerevisiae.","date":"1984","source":"Current genetics","url":"https://pubmed.ncbi.nlm.nih.gov/24177812","citation_count":3,"is_preprint":false},{"pmid":"355054","id":"PMC_355054","title":"[Intergeneric conjugational crossing of Escherichia coli with Salmonella typhimurium. II. Transfer of a polA1 mutation from Escherichia coli to Salmonella typhimurium and its phenotypic expression in the salmonella genome].","date":"1977","source":"Genetika","url":"https://pubmed.ncbi.nlm.nih.gov/355054","citation_count":3,"is_preprint":false},{"pmid":"40728626","id":"PMC_40728626","title":"Pola-R-CHP performed well in first-line Polarix trial-ineligible and IPI 0-1 DLBCL patients : Article type: research.","date":"2025","source":"Annals of hematology","url":"https://pubmed.ncbi.nlm.nih.gov/40728626","citation_count":2,"is_preprint":false},{"pmid":"37019676","id":"PMC_37019676","title":"[Autologous stem cell transplantation after pola-BR regimen as a salvage therapy in relapsed diffuse large B-cell lymphoma].","date":"2023","source":"[Rinsho ketsueki] The Japanese journal of clinical hematology","url":"https://pubmed.ncbi.nlm.nih.gov/37019676","citation_count":2,"is_preprint":false},{"pmid":"34119699","id":"PMC_34119699","title":"A patient with POLA1 splice variant expands the yet evolving phenotype of Van Esch O'Driscoll syndrome.","date":"2021","source":"European journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/34119699","citation_count":2,"is_preprint":false},{"pmid":"1103861","id":"PMC_1103861","title":"Dependence upon growth medium and the polA, polC, recA, recB, recC, and exrA genes of separate branches of the uvr Gene-dependent excision-repair process in Escherichia coli K12 cells.","date":"1975","source":"Basic life sciences","url":"https://pubmed.ncbi.nlm.nih.gov/1103861","citation_count":2,"is_preprint":false},{"pmid":"36182037","id":"PMC_36182037","title":"A Xp22.11-p21.3 microdeletion in a three-generation family supports male lethality of POLA1 nullisomy resulting in reduced fertility of female carriers.","date":"2022","source":"European journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/36182037","citation_count":1,"is_preprint":false},{"pmid":"37313856","id":"PMC_37313856","title":"Pola-R-CHP for frontline therapy in DLBCL: Are we saving money by spending more?","date":"2023","source":"British journal of haematology","url":"https://pubmed.ncbi.nlm.nih.gov/37313856","citation_count":1,"is_preprint":false},{"pmid":"3021157","id":"PMC_3021157","title":"Enhanced instability of IncFII basic replicon by the polA mutation.","date":"1986","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/3021157","citation_count":1,"is_preprint":false},{"pmid":"3903485","id":"PMC_3903485","title":"Modification of survival after ultraviolet light exposure in a wild-type and a polA strain of Escherichia coli B/r by preirradiation treatment with chloramphenicol or rifampin.","date":"1985","source":"Mutation research","url":"https://pubmed.ncbi.nlm.nih.gov/3903485","citation_count":1,"is_preprint":false},{"pmid":"7033042","id":"PMC_7033042","title":"[Repair and mutagenesis in Escherichia coli cells on induction in the DNA of monoadducts and cross-links by light-activated 8-methoxypsoralen. Dependence on the uvrA and polA genes].","date":"1981","source":"Genetika","url":"https://pubmed.ncbi.nlm.nih.gov/7033042","citation_count":1,"is_preprint":false},{"pmid":"39757000","id":"PMC_39757000","title":"Successful Treatment of Methotrexate-associated Lymphoproliferative Disorder with the Pola-R-CHP Regimen.","date":"2025","source":"Internal medicine (Tokyo, Japan)","url":"https://pubmed.ncbi.nlm.nih.gov/39757000","citation_count":1,"is_preprint":false},{"pmid":"3045488","id":"PMC_3045488","title":"Sensitivity of polA mutants of Escherichia coli K-12 to ozone and radiations.","date":"1988","source":"Mutagenesis","url":"https://pubmed.ncbi.nlm.nih.gov/3045488","citation_count":1,"is_preprint":false},{"pmid":"3294801","id":"PMC_3294801","title":"Isolation of Haemophilus influenzae genes that suppress Escherichia coli polA mutations.","date":"1987","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/3294801","citation_count":1,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":45357,"output_tokens":2335,"usd":0.085548,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":8358,"output_tokens":2246,"usd":0.04897,"stage2_stop_reason":"end_turn"},"total_usd":0.134518,"stage1_batch_id":"msgbatch_01CNoDbkChHEkgrJnL7BwtGJ","stage2_batch_id":"msgbatch_016Y4x9E9Wg5VQDANj9quSQD","note":"batch pricing = 50% of standard"},"stage1_raw":"Looking through the corpus, I need to identify papers about the human/mammalian POLA1 gene (encoding DNA polymerase alpha 1 catalytic subunit) versus papers about bacterial polA genes (DNA polymerase I in E. coli, B. subtilis, etc.) or other unrelated uses of \"POLA\" as an acronym (e.g., Pathologies Oculaires Liées à l'Age study, polatuzumab vedotin \"pola\").\n\nThe vast majority of papers are about:\n1. Bacterial polA (E. coli DNA Pol I) - these are NOT orthologs of human POLA1. Human POLA1 encodes DNA polymerase alpha (family B), while bacterial polA encodes DNA polymerase I (family A). These are fundamentally different enzymes. This is a symbol collision, not an ortholog situation.\n2. \"POLA\" as an epidemiological study acronym\n3. \"Pola\" as abbreviation for polatuzumab vedotin (a cancer drug)\n\nThe relevant papers about human POLA1 (DNA polymerase alpha catalytic subunit) are:\n- PMID 33392852: Review of POLA1 deficiency syndromes (XLPDR, VEODS) - mechanistic content about POLA1's role\n- PMID 37391593: SNRPB regulates POLA1 exon skipping leading to NMD\n- PMID 39128273: Synthetic lethality between ATR and POLA1\n- PMID 34772529: POLA1-HDAC11 dual inhibitors with POLA1 primer extension activity assay\n- PMID 32920362: Novel POLA1 inhibitors\n- PMID 34119699: POLA1 splice variant in VEODS\n- PMID 36182037: POLA1 nullisomy lethality\n- PMID 25045589: POLA1 promoter activity in proliferating cells\n\nLet me assess which have actual mechanistic findings about human POLA1:\n\n- PMID 33392852: Describes POLA1 as catalytic unit of DNA pol alpha that launches DNA replication with primase; XLPDR caused by intronic mutation causing missplicing; accompanied by type I IFN activation and NK cell dysfunction. Mechanistic content present.\n- PMID 37391593: SNRPB knockdown causes exon 3 skipping of POLA1, leading to premature termination codons and NMD - direct experiment.\n- PMID 39128273: Synthetic lethality between ATR/CHK1 and POLA1 demonstrated experimentally with ATR-deficient cells + POLA1 inhibition/siRNA.\n- PMID 34772529: In vitro POLA1 primer extension activity inhibited by novel compounds; MIR002 upregulates IFN-alpha in immunocompetent mice.\n- PMID 36182037: Heterozygous POLA1 deletion in females with skewed X-inactivation causes subfertility; supports male lethality of nullisomy.\n\n```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2021,\n      \"finding\": \"POLA1 encodes the catalytic subunit of DNA polymerase alpha, which together with the Primase complex initiates DNA replication. A recurrent intronic mutation causing missplicing of POLA1 underlies X-linked reticulate pigmentary disorder (XLPDR), which is accompanied by profound activation of type I interferon signaling and marked Natural Killer (NK) cell dysfunction, establishing that partial POLA1 deficiency drives an interferonopathy with specific immune cell impairment.\",\n      \"method\": \"Human genetic analysis of XLPDR patients combined with functional immunological characterization (NK cell functional assays, interferon pathway activation measurements)\",\n      \"journal\": \"Journal of clinical immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — human genetics plus functional immune assays in a single review synthesizing multiple studies; mechanistic link between missplicing and IFN activation established across multiple cases but reviewed rather than primary data\",\n      \"pmids\": [\"33392852\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"SNRPB silencing induces skipping of exon 3 of POLA1, which generates a premature termination codon and triggers nonsense-mediated RNA decay (NMD) of POLA1 mRNA, thereby reducing POLA1 protein levels and impairing DNA replication. POLA1 knockdown partially reversed the increased malignancy conferred by SNRPB overexpression in ovarian cancer cells, placing POLA1 downstream of SNRPB in this splicing-regulated pathway.\",\n      \"method\": \"RNA-seq and RT-PCR to detect exon skipping; siRNA knockdown of SNRPB with rescue experiments; NMD demonstrated by cycloheximide treatment; POLA1 knockdown epistasis in SNRPB-overexpressing cells\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal molecular methods (RNA-seq, RT-PCR, siRNA, rescue) in a single lab establishing the splicing-NMD mechanism for POLA1 regulation\",\n      \"pmids\": [\"37391593\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"POLA1 and ATR exhibit synthetic lethality: ATR-deficient cancer cells show markedly increased sensitivity to chemical POLA1 inhibition or siRNA-mediated POLA1 depletion, with cell death involving S-phase arrest and apoptosis. Conversely, siRNA-mediated POLA1 depletion sensitizes cancer cells to ATR and CHK1 inhibitors, establishing POLA1 as a functional partner of the ATR-CHK1 DNA damage response pathway.\",\n      \"method\": \"ATR-deficient DLD-1 cell model; chemical POLA1 inhibition; siRNA-mediated POLA1 knockdown; FACS-based cell cycle and apoptosis analysis; Western blotting for apoptotic markers\",\n      \"journal\": \"Neoplasia\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — two orthogonal approaches (chemical inhibition and siRNA) in ATR-deficient cells plus reciprocal sensitization experiments, single lab\",\n      \"pmids\": [\"39128273\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"POLA1 has primer extension (DNA polymerase) activity that can be inhibited by small-molecule dual POLA1-HDAC11 inhibitors (MIR002, GEM144). Inhibition of POLA1 in immunocompetent mice significantly upregulated interferon-alpha, consistent with the model that reduced POLA1 activity promotes type I interferon induction.\",\n      \"method\": \"In vitro POLA1 primer extension functional assay; molecular docking; in vivo xenograft models; IFN-alpha ELISA in immunocompetent mice after POLA1 inhibitor treatment\",\n      \"journal\": \"European journal of medicinal chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — in vitro enzymatic assay confirming primer extension activity plus in vivo IFN induction upon POLA1 inhibition; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"34772529\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Heterozygous deletion of POLA1 in females with skewed X-inactivation results in subfertility as the only phenotype, while hemizygous POLA1 nullisomy in males is inferred to cause very early embryonic lethality, demonstrating that complete absence of POLA1 function is incompatible with viability.\",\n      \"method\": \"Clinical and genomic characterization of a three-generation family with Xp22.11-p21.3 microdeletion encompassing POLA1; X-inactivation skewing analysis; reproductive outcome tracking across generations\",\n      \"journal\": \"European journal of medical genetics\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single family report, indirect inference of male lethality from absence of affected males; no direct cellular or biochemical mechanism demonstrated\",\n      \"pmids\": [\"36182037\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"POLA1 encodes the catalytic subunit of DNA polymerase alpha, an enzyme essential for initiating DNA replication in concert with the primase complex; partial loss-of-function mutations cause X-linked reticulate pigmentary disorder (XLPDR) or Van Esch-O'Driscoll syndrome (VEODS) with type I interferon activation and NK cell dysfunction, POLA1 expression is post-transcriptionally regulated by SNRPB-dependent exon 3 inclusion (loss causes NMD), POLA1 function is synthetically lethal with ATR/CHK1 pathway activity, and complete POLA1 nullisomy is likely lethal in males.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"POLA1 encodes the catalytic subunit of DNA polymerase alpha, which together with the primase complex initiates DNA replication, and which possesses intrinsic primer extension (DNA polymerase) activity demonstrable in vitro [#0, #3]. Partial loss-of-function caused by a recurrent intronic mutation that misspices POLA1 underlies X-linked reticulate pigmentary disorder (XLPDR), an interferonopathy marked by profound type I interferon activation and Natural Killer cell dysfunction [#0]; consistent with this, pharmacologic inhibition of POLA1 upregulates interferon-alpha in immunocompetent mice, linking reduced POLA1 activity to type I interferon induction [#3]. POLA1 abundance is set post-transcriptionally: SNRPB promotes inclusion of POLA1 exon 3, and SNRPB silencing drives exon skipping that introduces a premature termination codon, triggering nonsense-mediated decay and lowering POLA1 protein, an axis that contributes to SNRPB-driven malignancy in ovarian cancer cells [#1]. Functionally, POLA1 operates alongside the ATR-CHK1 DNA damage response: it is synthetically lethal with ATR loss, and its depletion sensitizes cells to ATR and CHK1 inhibition through S-phase arrest and apoptosis [#2]. Complete absence of POLA1 is incompatible with viability, with heterozygous deletion in females producing subfertility and hemizygous nullisomy inferred to be embryonic lethal in males [#4].\",\n  \"teleology\": [\n    {\n      \"year\": 2021,\n      \"claim\": \"Established that partial POLA1 deficiency is not merely a replication defect but drives a defined human interferonopathy, connecting a core replication enzyme to innate immune dysregulation.\",\n      \"evidence\": \"Human genetic analysis of XLPDR patients with NK cell functional assays and interferon pathway measurements\",\n      \"pmids\": [\"33392852\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Molecular trigger linking reduced POLA1 to type I interferon induction not defined\",\n        \"Why NK cells are selectively impaired not established\",\n        \"Reviewed synthesis rather than single primary dataset\"\n      ]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Confirmed POLA1 intrinsic primer extension catalytic activity in vitro and showed that inhibiting this activity induces interferon-alpha in vivo, providing a causal link between POLA1 enzymatic output and interferon induction.\",\n      \"evidence\": \"In vitro POLA1 primer extension assay, molecular docking, and IFN-alpha ELISA in immunocompetent mice treated with dual POLA1-HDAC11 inhibitors\",\n      \"pmids\": [\"34772529\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Dual POLA1-HDAC11 inhibitors confound attribution of IFN effect to POLA1 alone\",\n        \"Downstream sensor coupling reduced polymerase activity to IFN not identified\"\n      ]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Defined the viability requirement for POLA1, distinguishing tolerated partial loss from lethal complete loss and explaining the X-linked inheritance pattern.\",\n      \"evidence\": \"Clinical and genomic characterization of a three-generation family with Xp22.11-p21.3 microdeletion plus X-inactivation skewing analysis\",\n      \"pmids\": [\"36182037\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"Single family report with male lethality inferred from absence of affected males, not directly demonstrated\",\n        \"Deletion spans additional genes beyond POLA1\",\n        \"No cellular or biochemical mechanism for the subfertility phenotype\"\n      ]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Revealed that POLA1 protein level is controlled post-transcriptionally by splicing, placing it downstream of an SNRPB-regulated exon-inclusion/NMD axis relevant to cancer malignancy.\",\n      \"evidence\": \"RNA-seq, RT-PCR, siRNA knockdown with rescue, cycloheximide NMD assay, and POLA1 knockdown epistasis in SNRPB-overexpressing ovarian cancer cells\",\n      \"pmids\": [\"37391593\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Single lab and single cancer context\",\n        \"Whether this splicing axis operates in normal tissues not addressed\"\n      ]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Positioned POLA1 as a functional partner of the ATR-CHK1 replication stress response, identifying a synthetic-lethal vulnerability with therapeutic potential.\",\n      \"evidence\": \"ATR-deficient DLD-1 model with chemical and siRNA POLA1 depletion, reciprocal sensitization to ATR/CHK1 inhibitors, and FACS cell-cycle/apoptosis analysis\",\n      \"pmids\": [\"39128273\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"Single cell-line context\",\n        \"Mechanistic basis of the synthetic lethality (replication catastrophe vs checkpoint loss) not resolved\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The molecular mechanism coupling reduced POLA1 polymerase activity to type I interferon sensing and to selective NK cell impairment remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"No identified nucleic acid sensor linking POLA1 deficiency to IFN\",\n        \"No structural model of POLA1 in the primase-polymerase initiation complex in this corpus\",\n        \"Cell-type basis of immune phenotypes uncharacterized\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140097\", \"supporting_discovery_ids\": [0, 3]}\n    ],\n    \"localization\": [],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-69306\", \"supporting_discovery_ids\": [0, 2]}\n    ],\n    \"complexes\": [\"DNA polymerase alpha-primase\"],\n    \"partners\": [\"SNRPB\", \"ATR\", \"CHK1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"tie","faith_supported":5,"faith_total":5,"faith_pct":100.0}}