ERCC2(Excision Repair Cross-Complementation Group 2)是一种关键的DNA修复基因,属于核苷酸切除修复(NER)通路中的核心成员。它编码的蛋白质是转录因子IIH(TFIIH)复合物的组成部分,该复合物在DNA损伤修复和转录调控中起重要作用。ERCC2的主要功能是通过其DNA解旋酶活性参与识别和修复由紫外线(UV)或化学物质引起的DNA损伤,特别是嘧啶二聚体等大体积损伤。该基因在维持基因组稳定性中至关重要,其突变会导致修复功能缺陷,引发严重的遗传病如着色性干皮病(XP)、科凯恩综合征(CS)或毛发硫营养不良(TTD),患者表现为对光敏感、早衰或神经发育异常。ERCC2属于ERCC基因家族,该家族成员均参与DNA修复,特别是NER通路,共同特点是能够识别并切除受损DNA片段,确保遗传信息完整性。若ERCC2表达降低,细胞会积累DNA损伤,增加突变率和癌症风险(如皮肤癌);而过度表达虽可能增强修复能力,但可能干扰正常细胞周期调控。ERCC2突变还与多种癌症易感性相关,例如肺癌和膀胱癌,其单核苷酸多态性(SNP)可作为生物标志物预测癌症风险或化疗反应。研究还发现ERCC2与其他修复基因(如XPA、XPC)协同作用,其功能异常会影响整个NER通路效率。
The nucleotide excision repair pathway is a mechanism to repair damage to DNA. The protein encoded by this gene is involved in transcription-coupled nucleotide excision repair and is an integral member of the basal transcription factor BTF2/TFIIH complex. The gene product has ATP-dependent DNA helicase activity and belongs to the RAD3/XPD subfamily of helicases. Defects in this gene can result in three different disorders, the cancer-prone syndrome xeroderma pigmentosum complementation group D, trichothiodystrophy, and Cockayne syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]
Subcellular localization of ERCC2 (and its protein):
Gene Ontology (GO) terms for ERCC2:
| Interacting Gene | Interaction | Source/Score |
| Name |
|---|
| 3022 Basal transcription factors [PATH:hsa03022] |
| 3420 Nucleotide excision repair [PATH:hsa03420] |
| Name |
|---|
| Cytosolic iron-sulfur cluster assembly |
| Disease |
| DNA Repair |
| Dual incision reaction in GG-NER |
| Dual incision reaction in TC-NER |
| Epigenetic regulation of gene expression |
| Formation of HIV elongation complex in the absence of HIV Tat |
| Formation of HIV-1 elongation complex containing HIV-1 Tat |
| Formation of incision complex in GG-NER |
| Formation of RNA Pol II elongation complex |
| Formation of the Early Elongation Complex |
| Formation of the HIV-1 Early Elongation Complex |
| Formation of transcription-coupled NER (TC-NER) repair complex |
| Gene Expression |
| Global Genomic NER (GG-NER) |
| HIV Infection |
| HIV Life Cycle |
| HIV Transcription Elongation |
| HIV Transcription Initiation |
| Infectious disease |
| Late Phase of HIV Life Cycle |
| Metabolism |
| mRNA Capping |
| Negative epigenetic regulation of rRNA expression |
| NoRC negatively regulates rRNA expression |
| Nucleotide Excision Repair |
| RNA Pol II CTD phosphorylation and interaction with CE |
| RNA Polymerase I Chain Elongation |
| RNA Polymerase I Promoter Clearance |
| RNA Polymerase I Promoter Escape |
| RNA Polymerase I Transcription |
| RNA Polymerase I Transcription Initiation |
| RNA Polymerase I Transcription Termination |
| RNA Polymerase I, RNA Polymerase III, and Mitochondrial Transcription |
| RNA Polymerase II HIV Promoter Escape |
| RNA Polymerase II Pre-transcription Events |
| RNA Polymerase II Promoter Escape |
| RNA Polymerase II Transcription |
| RNA Polymerase II Transcription Elongation |
| RNA Polymerase II Transcription Initiation |
| RNA Polymerase II Transcription Initiation And Promoter Clearance |
| RNA Polymerase II Transcription Pre-Initiation And Promoter Opening |
| Tat-mediated elongation of the HIV-1 transcript |
| Transcription |
| Transcription of the HIV genome |
| Transcription-coupled NER (TC-NER) |
| Disease | Score | NofPmids | NofSnps | Source |
| Xeroderma Pigmentosum, Complementation Group D | 0.565428837 | 25 | 9 | BeFree_CLINVAR_CTD_human_MGD_ORPHANET_UNIPROT |
| Photosensitive Trichothiodystrophy | 0.44 | 6 | 6 | CLINVAR_CTD_human_MGD_UNIPROT |
| Cerebrooculofacioskeletal Syndrome 2 | 0.36 | 1 | 2 | CLINVAR_CTD_human_UNIPROT |
| Cerebrooculofacioskeletal Syndrome 1 | 0.240542884 | 2 | 2 | BeFree_CLINVAR_ORPHANET |
| Malignant neoplasm of lung | 0.213843535 | 78 | 18 | BeFree_GAD_GWASCAT |
| Squamous cell carcinoma | 0.175575822 | 23 | 2 | BeFree_CTD_human_GAD_LHGDN |
| Skin Neoplasms | 0.151486052 | 11 | 0 | CTD_human_GAD_LHGDN |
| Stomach Neoplasms | 0.144027638 | 9 | 0 | CTD_human_GAD_LHGDN |
| Colorectal Neoplasms | 0.142732561 | 9 | 0 | CTD_human_GAD_LHGDN |
| Trichothiodystrophy Syndromes | 0.137915164 | 66 | 2 | BeFree_ORPHANET |
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