RPA2(Replication Protein A2)是复制蛋白A(RPA)复合物的一个亚基,属于RPA基因家族。RPA是由RPA1、RPA2和RPA3三个亚基组成的异源三聚体蛋白复合物,在DNA代谢过程中发挥核心作用,包括DNA复制、修复和重组。RPA复合物通过与单链DNA(ssDNA)高亲和力结合,保护其免受核酸酶降解或形成二级结构,并为其他DNA处理蛋白提供平台。RPA2是该复合物的中间亚基,具有多个磷酸化位点,可调节其功能。RPA2在细胞周期检查点调控中起关键作用,特别是在DNA损伤应答(DDR)中,其磷酸化状态可影响下游信号通路的激活。RPA2突变可能导致基因组不稳定,增加癌症风险,如乳腺癌和卵巢癌。RPA2表达异常(过表达或低表达)会破坏DNA复制和修复的平衡,过表达可能促进肿瘤细胞增殖和耐药性,而低表达则导致DNA损伤积累和细胞凋亡。RPA基因家族的共性在于它们均参与DNA代谢,具有保守的ssDNA结合域(OB-fold),并在维持基因组稳定性中起协同作用。RPA2的功能障碍与多种疾病相关,包括癌症、神经退行性疾病和早衰综合征。
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RPA2基因(以及对应的蛋白质)的细胞分布位置:
RPA2基因的本体(GO)信息:
| 名称 |
|---|
| 3030 DNA replication [PATH:hsa03030] |
| 3420 Nucleotide excision repair [PATH:hsa03420] |
| 3430 Mismatch repair [PATH:hsa03430] |
| 3440 Homologous recombination [PATH:hsa03440] |
| 3460 Fanconi anemia pathway [PATH:hsa03460] |
| 名称 |
|---|
| Activation of ATR in response to replication stress |
| Activation of the pre-replicative complex |
| Assembly of the RAD51-ssDNA nucleoprotein complex |
| Base Excision Repair |
| Cell Cycle |
| Cell Cycle Checkpoints |
| Cell Cycle, Mitotic |
| Cellular response to heat stress |
| Cellular responses to stress |
| Chromosome Maintenance |
| DNA Damage Bypass |
| DNA Repair |
| DNA Replication |
| DNA Replication Pre-Initiation |
| DNA strand elongation |
| Double-Strand Break Repair |
| Dual incision reaction in GG-NER |
| Extension of Telomeres |
| Formation of incision complex in GG-NER |
| G1/S Transition |
| G2/M Checkpoints |
| 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) |
| Homologous DNA pairing and strand exchange |
| Homologous Recombination Repair |
| Homologous recombination repair of replication-independent double-strand breaks |
| HSF1 activation |
| Lagging Strand Synthesis |
| M/G1 Transition |
| Meiosis |
| Meiotic recombination |
| Mismatch Repair |
| Mismatch repair (MMR) directed by MSH2:MSH3 (MutSbeta) |
| Mismatch repair (MMR) directed by MSH2:MSH6 (MutSalpha) |
| Mitotic G1-G1/S phases |
| Nucleotide Excision Repair |
| PCNA-Dependent Long Patch Base Excision Repair |
| Presynaptic phase of homologous DNA pairing and strand exchange |
| Processing of DNA double-strand break ends |
| Processive synthesis on the C-strand of the telomere |
| Processive synthesis on the lagging strand |
| Recognition of DNA damage by PCNA-containing replication complex |
| Regulation of HSF1-mediated heat shock response |
| Removal of the Flap Intermediate |
| Removal of the Flap Intermediate from the C-strand |
| 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 Maintenance |
| Termination of translesion DNA synthesis |
| Transcription-coupled NER (TC-NER) |
| Translesion Synthesis by POLH |
| Translesion synthesis by POLI |
| Translesion synthesis by POLK |
| Translesion synthesis by REV1 |
| Translesion synthesis by Y family DNA polymerases bypasses lesions on DNA template |
| 疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
| Multiple Endocrine Neoplasia | 0.00272435 | 1 | 0 | LHGDN |
| Malignant neoplasm of breast | 0.002638474 | 2 | 0 | BeFree_GAD |
| Malignant neoplasm of urinary bladder | 0.002367032 | 1 | 0 | GAD |
| Alcoholic Intoxication, Chronic | 0.002367032 | 1 | 0 | GAD |
| Multiple Sclerosis | 0.002367032 | 1 | 0 | GAD |
| Mammary Ductal Carcinoma | 0.000271442 | 1 | 0 | BeFree |
| Breast Carcinoma | 0.000271442 | 1 | 0 | BeFree |
| Carcinogenesis | 0.000271442 | 1 | 0 | BeFree |
| Malignant neoplasm of female breast | 0.000271442 | 1 | 0 | BeFree |
| Ductal Breast Carcinoma | 0.000271442 | 1 | 0 | BeFree |
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