POLE基因编码DNA聚合酶ε的催化亚基,属于B家族DNA聚合酶,在真核生物DNA复制和修复中起关键作用。POLE是DNA聚合酶ε复合物的核心组成部分,主要负责前导链的合成,具有高保真度的3'-5'核酸外切酶校对活性,确保DNA复制的准确性。该基因在细胞周期S期表达最高,与增殖细胞核抗原(PCNA)等复制因子相互作用形成复制体。POLE突变(特别是外切酶结构域突变如P286R和V411L)会导致校对功能缺陷,引发超突变表型,与多种癌症相关,尤其是结直肠癌和子宫内膜癌。这些突变使复制错误率增加100倍以上,产生微卫星不稳定(MSI)和肿瘤突变负荷(TMB)升高。POLE属于B家族聚合酶,该家族成员均含保守的聚合酶核心结构域,具有"右手"结构(掌、指、拇指域)和金属离子催化中心。POLE过表达可能加速DNA复制但增加错误风险,而表达降低会导致复制压力、基因组不稳定和细胞周期阻滞。POLE功能异常还与免疫治疗反应相关,因其产生的肿瘤新抗原可增强免疫识别。该基因突变表型具有"双重性":一方面增加癌症风险,另一方面因产生大量突变可能改善免疫治疗效果。
This gene encodes the catalytic subunit of DNA polymerase epsilon. The enzyme is involved in DNA repair and chromosomal DNA replication. Mutations in this gene have been associated with colorectal cancer 12 and facial dysmorphism, immunodeficiency, livedo, and short stature. [provided by RefSeq, Sep 2013]
这个基因编码DNA聚合酶小量的催化亚基。酶是参与DNA修复和染色体DNA的复制。在这个基因的突变已与结肠癌12和面部畸形,免疫缺陷,青斑,以及身材矮小相关联。 [由RefSeq的,2013年9月提供]
POLE基因(以及对应的蛋白质)的细胞分布位置:
POLE基因的本体(GO)信息:
名称 |
---|
230 Purine metabolism [PATH:hsa00230] |
240 Pyrimidine metabolism [PATH:hsa00240] |
3030 DNA replication [PATH:hsa03030] |
3410 Base excision repair [PATH:hsa03410] |
3420 Nucleotide excision repair [PATH:hsa03420] |
5166 HTLV-I infection [PATH:hsa05166] |
名称 |
---|
Activation of the pre-replicative complex |
Base Excision Repair |
Cell Cycle |
Cell Cycle, Mitotic |
Chromosome Maintenance |
DNA Damage Bypass |
DNA Repair |
DNA Replication |
DNA replication initiation |
DNA Replication Pre-Initiation |
Extension of Telomeres |
G1/S Transition |
Gap-filling DNA repair synthesis and ligation in GG-NER |
Gap-filling DNA repair synthesis and ligation in TC-NER |
Global Genomic NER (GG-NER) |
M/G1 Transition |
Mitotic G1-G1/S phases |
Nucleotide Excision Repair |
PCNA-Dependent Long Patch Base Excision Repair |
Recognition of DNA damage by PCNA-containing replication complex |
Repair synthesis for gap-filling by DNA polymerase in TC-NER |
Repair synthesis of patch ~27-30 bases long by DNA polymerase |
Resolution of Abasic Sites (AP sites) |
Resolution of AP sites via the multiple-nucleotide patch replacement pathway |
S Phase |
Synthesis of DNA |
Telomere C-strand (Lagging Strand) Synthesis |
Telomere C-strand synthesis initiation |
Telomere Maintenance |
Termination of translesion DNA synthesis |
Transcription-coupled NER (TC-NER) |
Translesion synthesis by Y family DNA polymerases bypasses lesions on DNA template |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
FACIAL DYSMORPHISM, IMMUNODEFICIENCY, LIVEDO, AND SHORT STATURE | 0.240271442 | 1 | 1 | BeFree_CLINVAR_ORPHANET |
COLORECTAL CANCER, SUSCEPTIBILITY TO, 12 | 0.24 | 1 | 1 | CLINVAR_UNIPROT |
Colorectal Neoplasms | 0.12 | 2 | 0 | CTD_human |
Endometrial Carcinoma | 0.002985861 | 11 | 1 | BeFree |
Lung Neoplasms | 0.00272435 | 1 | 0 | LHGDN |
Mammary Neoplasms | 0.00272435 | 1 | 0 | LHGDN |
Narcolepsy | 0.002638474 | 1 | 0 | BeFree_GAD |
Malignant neoplasm of urinary bladder | 0.002367032 | 1 | 0 | GAD |
Graft-vs-Host Disease | 0.002367032 | 1 | 0 | GAD |
Tobacco Use Disorder | 0.002367032 | 1 | 0 | GAD |
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