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The antitumorigenic roles of BRCA1-BARD1 in DNA repair and replication.
Nature Reviews Molecular Cell Biology ( IF 81.3 ) Pub Date : 2020-02-24 , DOI: 10.1038/s41580-020-0218-z
Madalena Tarsounas 1 , Patrick Sung 2
Affiliation  

The tumour suppressor breast cancer type 1 susceptibility protein (BRCA1) promotes DNA double-strand break (DSB) repair by homologous recombination and protects DNA replication forks from attrition. BRCA1 partners with BRCA1-associated RING domain protein 1 (BARD1) and other tumour suppressor proteins to mediate the initial nucleolytic resection of DNA lesions and the recruitment and regulation of the recombinase RAD51. The discovery of the opposing functions of BRCA1 and the p53-binding protein 1 (53BP1)-associated complex in DNA resection sheds light on how BRCA1 influences the choice of homologous recombination over non-homologous end joining and potentially other mutagenic pathways of DSB repair. Understanding the functional crosstalk between BRCA1-BARD1 and its cofactors and antagonists will illuminate the molecular basis of cancers that arise from a deficiency or misregulation of chromosome damage repair and replication fork maintenance. Such knowledge will also be valuable for understanding acquired tumour resistance to poly(ADP-ribose) polymerase (PARP) inhibitors and other therapeutics and for the development of new treatments. In this Review, we discuss recent advances in elucidating the mechanisms by which BRCA1-BARD1 functions in DNA repair, replication fork maintenance and tumour suppression, and its therapeutic relevance.

中文翻译:


BRCA1-BARD1 在 DNA 修复和复制中的抗肿瘤作用。



肿瘤抑制乳腺癌 1 型易感蛋白 (BRCA1) 通过同源重组促进 DNA 双链断裂 (DSB) 修复,并保护 DNA 复制叉免于磨损。 BRCA1 与 BRCA1 相关 RING 结构域蛋白 1 (BARD1) 和其他肿瘤抑制蛋白合作,介导 DNA 损伤的初始溶核切除以及重组酶 RAD51 的招募和调节。 BRCA1 和 p53 结合蛋白 1 (53BP1) 相关复合物在 DNA 切除中的相反功能的发现揭示了 BRCA1 如何影响同源重组相对于非同源末端连接的选择以及 DSB 修复的其他潜在诱变途径。了解 BRCA1-BARD1 及其辅助因子和拮抗剂之间的功能串扰将阐明因染色体损伤修复和复制叉维护的缺陷或失调而引起的癌症的分子基础。这些知识对于了解肿瘤对聚(ADP-核糖)聚合酶(PARP)抑制剂和其他疗法的耐药性以及新疗法的开发也很有价值。在这篇综述中,我们讨论了阐明 BRCA1-BARD1 在 DNA 修复、复制叉维持和肿瘤抑制中发挥作用的机制及其治疗相关性的最新进展。
更新日期:2020-02-24
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