Department of Genetics and Netherlands Proteomics Centre, Centre for Biomedical Genetics, Erasmus Medical Centre, 3015 GE Rotterdam, The Netherlands.
Cold Spring Harb Perspect Biol. 2013 Aug 1;5(8):a012625. doi: 10.1101/cshperspect.a012625.
Transcriptional arrest caused by DNA damage is detrimental for cells and organisms as it impinges on gene expression and thereby on cell growth and survival. To alleviate transcriptional arrest, cells trigger a transcription-dependent genome surveillance pathway, termed transcription-coupled nucleotide excision repair (TC-NER) that ensures rapid removal of such transcription-impeding DNA lesions and prevents persistent stalling of transcription. Defective TC-NER is causatively linked to Cockayne syndrome, a rare severe genetic disorder with multisystem abnormalities that results in patients' death in early adulthood. Here we review recent data on how damage-arrested transcription is actively coupled to TC-NER in mammals and discuss new emerging models concerning the role of TC-NER-specific factors in this process.
DNA 损伤引起的转录停滞对细胞和生物体是有害的,因为它会影响基因表达,从而影响细胞生长和存活。为了减轻转录停滞,细胞会触发一种依赖转录的基因组监测途径,称为转录偶联核苷酸切除修复(TC-NER),它可确保快速清除这些转录受阻的 DNA 损伤,并防止转录持续停滞。TC-NER 缺陷与 Cockayne 综合征有关,Cockayne 综合征是一种罕见的严重遗传疾病,多系统异常,导致患者在成年早期死亡。本文综述了近年来关于哺乳动物中损伤诱导的转录如何与 TC-NER 有效偶联的相关数据,并讨论了关于 TC-NER 特异性因子在该过程中的作用的新出现模型。