含有转录激活剂DriD的WYL域结构,与ssDNA效应器和DNA点位点复合
Maria A Schumacher1, Emily Cannistraci1, Raul Salinas1
1Department of Biochemistry, 307 Research Dr., Box 3711, Duke University Medical Center, Durham, NC 27710, USA.
Nucleic acids research
|December 24, 2023
概括
这项研究揭示了Caulobacter crescentus转录激活剂DriD如何结合DNA,使用在DNA损伤反应期间由单链DNA (ssDNA) 触发的新型不对称机制.
科学领域:
- 分子生物学分子生物学
- 结构生物学 结构生物学
- 微生物学 微生物学
背景情况:
- 转录调节器对于环境适应至关重要.
- 包括Caulobacter crescentus DriD在内的WYL域家族调节了DNA损伤反应.
- WYL调节器信号传感和DNA识别的机制尚不清楚.
研究的目的:
- 为了阐明DriD DNA结合的分子机制.
- 为了确定DriD与DNA和效应器ssDNA复合的结构.
- 了解ssDNA结合如何影响DriD与目标DNA的相互作用.
主要方法:
- 一个全长的Caulobacter crescentus的X射线晶体学DriD.
- 对DriD结合目标DNA和效应器单链DNA (ssDNA) 的结构分析.
- 对DriD的域互动的研究:有翅膀的-HTH (wHTH),链接器,WYL域和WCX二次元.
主要成果:
- 该结构揭示了DriD的多域架构,包括wHTH,链接器,WYL和WCX二次元域.
- 一个新的,不对称的DNA结合机制通过链接器构成介导被确定.
- 结合WYL域的ssDNA调节了wHTH域的DNA结合活性.
结论:
- 这项研究介绍了WYL激活器与效应器和点DNA结合的第一个结构.
- 独特的DriD非对称DNA结合模式提供了对WYL激活器功能的洞察.
- 这些发现表明,这种结合模式可能在WYL激活器家族中保持.
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