Higgs Martin R, Stewart Grant S
a Institute of Cancer and Genomic Studies , University of Birmingham , Birmingham , UK.
Nucleus. 2016;7(1):34-40. doi: 10.1080/19491034.2016.1143183. Epub 2016 Feb 18.
Replication stress, defined as the slowing or stalling of cellular DNA replication forks, represents a serious threat to genome stability. Numerous cellular pathways protect against replication stress and maintain genomic integrity. Among these, the Fanconi Anemia/homologous recombination pathways are critical for recognizing and repairing stalled replication forks. Members of these pathways play a vital role in protecting damaged forks from uncontrolled attack from cellular nucleases, which would otherwise render these irreparable. Recent studies have begun to shed light on the protective factors necessary to suppress nucleolytic over-processing of nascent DNA, and on the different cellular nucleases involved. Here, we review our recent identification of a novel fork protection factor, BOD1L, and discuss its role in preventing the processing of stalled replication forks within the context of current knowledge of the replication fork 'protectosome'.
复制应激被定义为细胞DNA复制叉的减慢或停滞,对基因组稳定性构成严重威胁。众多细胞通路可抵御复制应激并维持基因组完整性。其中,范可尼贫血/同源重组通路对于识别和修复停滞的复制叉至关重要。这些通路的成员在保护受损复制叉免受细胞核酸酶的无节制攻击方面发挥着至关重要的作用,否则这些复制叉将无法修复。最近的研究已开始揭示抑制新生DNA核酸分解过度加工所需的保护因子,以及所涉及的不同细胞核酸酶。在此,我们回顾我们最近对一种新型叉保护因子BOD1L的鉴定,并结合复制叉“保护体”的现有知识,讨论其在防止停滞复制叉加工中的作用。