ERCC5(也称为XPG)是核苷酸切除修复(NER)途径中的关键基因,属于ERCC(切除修复交叉互补)基因家族。该家族成员主要参与DNA损伤修复,特别是修复由紫外线或化学物质引起的DNA损伤。ERCC5编码的XPG蛋白是一种结构特异性内切酶,负责在NER过程中切割受损DNA链的3'端,与其他修复蛋白协同完成损伤修复。XPG还具有参与转录偶联修复(TCR)的功能,确保活跃转录基因的优先修复。ERCC5突变会导致着色性干皮病(XP)的G组表型,患者对紫外线极度敏感,易患皮肤癌,并可能出现神经退化症状。此外,ERCC5突变还与科凯恩综合征(CS)和毛发硫营养不良(TTD)等早衰性疾病相关,这些疾病表现为发育迟缓、光敏感和神经系统异常。ERCC5表达异常(过高或过低)会影响基因组稳定性,过表达可能干扰正常DNA修复平衡,而表达不足则导致损伤积累,增加突变和癌症风险。ERCC5还与癌症治疗反应相关,其表达水平可能影响化疗和放疗效果。ERCC基因家族的共性在于它们编码的蛋白大多参与DNA修复,特别是NER途径,共同维护基因组完整性。家族成员如ERCC1-ERCC8在不同修复步骤中发挥作用,突变常导致DNA修复缺陷疾病。ERCC5的功能研究有助于理解癌症、衰老和遗传性疾病的机制,并为相关治疗提供潜在靶点。
This gene encodes a single-strand specific DNA endonuclease that makes the 3' incision in DNA excision repair following UV-induced damage. The protein may also function in other cellular processes, including RNA polymerase II transcription, and transcription-coupled DNA repair. Mutations in this gene cause xeroderma pigmentosum complementation group G (XP-G), which is also referred to as xeroderma pigmentosum VII (XP7), a skin disorder characterized by hypersensitivity to UV light and increased susceptibility for skin cancer development following UV exposure. Some patients also develop Cockayne syndrome, which is characterized by severe growth defects, mental retardation, and cachexia. Read-through transcription exists between this gene and the neighboring upstream BIVM (basic, immunoglobulin-like variable motif containing) gene. [provided by RefSeq, Feb 2011]
此基因编码一种单链特异性DNA内切核酸酶,使3‘切口的DNA切除修复以下紫外线损伤。该蛋白还可以起到在其他细胞过程,包括RNA聚合酶II转录,以及转录偶联的DNA修复。突变该基因导致着色性干皮互补组G(XP??-G),其也被称作着色性干皮VII(XP7),皮肤疾病的特点是过敏紫外线和皮肤癌发展以下UV暴露增加的易感性英寸一些患者还开发科凯恩综合症,其特征是严重的生长缺陷,智力低下,和恶病质。这个基因和邻近的上游BIVM(基本,免疫球蛋白样可变图案含)基因之间存在读通过转录。 [由RefSeq的,2011年2月提供]
ERCC5基因(以及对应的蛋白质)的细胞分布位置:
ERCC5基因的本体(GO)信息:
名称 |
---|
3420 Nucleotide excision repair [PATH:hsa03420] |
名称 |
---|
DNA Repair |
Dual incision reaction in GG-NER |
Dual incision reaction in TC-NER |
Formation of incision complex in GG-NER |
Formation of transcription-coupled NER (TC-NER) repair complex |
Global Genomic NER (GG-NER) |
Nucleotide Excision Repair |
Transcription-coupled NER (TC-NER) |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Xeroderma pigmentosum, group G | 0.442171535 | 10 | 3 | BeFree_CTD_human_MGD_ORPHANET_UNIPROT |
Cerebrooculofacioskeletal Syndrome 1 | 0.240542884 | 2 | 0 | BeFree_CTD_human_ORPHANET |
Xeroderma Pigmentosum, Type G/Cockayne Syndrome | 0.120542884 | 2 | 0 | BeFree_CLINVAR |
Pena Shokeir syndrome Type 2 | 0.12 | 0 | 0 | ORPHANET |
CAMFAK syndrome | 0.12 | 0 | 0 | ORPHANET |
Malignant neoplasm of lung | 0.030033035 | 15 | 6 | BeFree_GAD |
Malignant neoplasm of urinary bladder | 0.020293465 | 12 | 2 | BeFree_GAD |
Malignant neoplasm of breast | 0.018740759 | 11 | 28 | BeFree_GAD |
Colorectal Cancer | 0.015830843 | 11 | 2 | BeFree_GAD |
Cockayne Syndrome | 0.010877538 | 21 | 1 | BeFree_LHGDN |
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