更新于:2025-05-07

WRN

基本信息

别名
3'-5' exonuclease、ATP-dependent helicase、Bifunctional 3'-5' exonuclease/ATP-dependent helicase WRN
+ [9]
简介
Multifunctional enzyme that has magnesium and ATP-dependent 3'-5' DNA-helicase activity on partially duplex substrates (PubMed:9224595, PubMed:9288107, PubMed:9611231). Also has 3'->5' exonuclease activity towards double-stranded (ds)DNA with a 5'-overhang (PubMed:11863428). Has no nuclease activity towards single-stranded (ss)DNA or blunt-ended dsDNA (PubMed:11863428). Helicase activity is most efficient with (d)ATP, but (d)CTP will substitute with reduced efficiency; strand displacement is enhanced by single-strand binding-protein (heterotrimeric replication protein A complex, RPA1, RPA2, RPA3) (PubMed:9611231). Binds preferentially to DNA substrates containing alternate secondary structures, such as replication forks and Holliday junctions. May play an important role in the dissociation of joint DNA molecules that can arise as products of homologous recombination, at stalled replication forks or during DNA repair. Alleviates stalling of DNA polymerases at the site of DNA lesions. Plays a role in the formation of DNA replication focal centers; stably associates with foci elements generating binding sites for RP-A (By similarity). Plays a role in double-strand break repair after gamma-irradiation (PubMed:9224595, PubMed:9288107, PubMed:9611231). Unwinds some G-quadruplex DNA (d(CGG)n tracts); unwinding seems to occur in both 5'-3' and 3'-5' direction and requires a short single-stranded tail (PubMed:10212265). d(CGG)n tracts have a propensity to assemble into tetraplex structures; other G-rich substrates from a telomeric or IgG switch sequence are not unwound (PubMed:10212265). Depletion leads to chromosomal breaks and genome instability (PubMed:33199508).

分析

对领域进行一次全面的分析。
对领域进行一次全面的分析。
提出任何生物医药研究问题
让每一步生物医药决策都精准制胜
基于十亿级生物数据与全球情报的精准 AI,赋能早期药物发现
立即开始免费试用!
智慧芽新药情报库是智慧芽专为生命科学人士构建的基于AI的创新药情报平台,助您全方位提升您的研发与决策效率。
立即接入生物医药数据包
智慧芽新药库数据也通过智慧芽开放平台,以MCP或API服务形式对外开放。立即使用我们的MCP服务定制您的LLM智能体。
生物序列数据库
生物药研发创新
免费使用
化学结构数据库
小分子化药研发创新
免费使用