Genome Stability Group, YCR Institute for Cancer Studies, University of Sheffield Medical School, Sheffield, UK.
EMBO J. 2010 Feb 17;29(4):703-5. doi: 10.1038/emboj.2009.415.
DNA lesions or genomic regions that are difficult to traverse frequently hinder or block DNA replication. In response to replication fork stalling, the cell activates the replication stress response pathway, which acts to protect the fork from collapse, promotes the repair or bypass of the blockage and facilitates the resumption of DNA synthesis. In this issue of the EMBO Journal, two studies conducted by the Constantinou and Niedzwiedz laboratories shed light on how the DNA translocase FANCM acts to regulate the replication stress response (Luke-Glaser et al, 2009; Schwab et al, 2009). These studies help to explain how FANCM (mutated in the human cancer predisposition syndrome, Fanconi's anaemia (FA)) co-ordinately regulates checkpoint signalling and replication fork progression.
DNA 损伤或难以穿越的基因组区域经常阻碍或阻断 DNA 复制。为了应对复制叉停滞,细胞激活复制应激反应途径,该途径的作用是保护叉不崩溃,促进阻塞的修复或绕过,并促进 DNA 合成的恢复。在本期《欧洲分子生物学组织杂志》上, Constantinou 和 Niedzwiedz 实验室的两项研究揭示了 DNA 易位酶 FANCM 如何调节复制应激反应(Luke-Glaser 等人,2009;Schwab 等人,2009)。这些研究有助于解释 FANCM(在人类癌症易感性综合征,范可尼贫血(FA)中突变)如何协调调节检查点信号和复制叉进展。