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在Deinococcus radiodurans中对DHH/DHHA1家族蛋白质的结构和功能研究

Ying Wang¹, Wanshan Hao¹, Ziming Guo¹

¹Zhejiang Key Laboratory of Medical Epigenetics, Department of Immunology and Pathogen Biology, School of Basic Medical Sciences, Affiliated Hospital of Hangzhou Normal University, Hangzhou Normal University, Hangzhou 311121, China.

Nucleic acids research

|May 28, 2024

概括

类似Deinococcus RecJ的蛋白质影响应激反应,细胞生长和蛋白质稳定性,具有独特的RNA/DNA和c-di-AMP活性. 它的结构揭示了关键的功能残留物和二元化要求.

科学领域:

微生物学微生物学
生物化学生化学
结构生物学结构生物学

背景情况:

DHH/DHHA1家族蛋白质对于细菌的抗压能力至关重要.
迪诺科克斯物种拥有两种这样的蛋白质:RecJ和RecJ-like.
虽然Deinococcus radiodurans RecJ (DrRecJ) 的功能是已知的,但Deinococcus radiodurans RecJ-like (DrRecJ-like) 的功能仍然不太清楚.

研究的目的:

阐明DrRecJ类生物化学活动和功能作用.
为了研究DrRecJ类函数的结构基础.
为了比较DrRecJ和DrRecJ类似的活动.

主要方法:

进行了表型和转录组分析.
生物化学测试用于确定基质特异性.
采用X射线结晶学和突变分析来确定结构和关键功能残留物.

主要成果:

类似DrRecJ的药物会影响应激反应,细胞生长,分裂,蛋白质折叠和膜稳定性.
类似DrRecJ的细胞对单链RNA/DNA寡头和循环二AMP (c-di-AMP) 具有催化活性.
类似DrRecJ的晶体结构揭示了Mg2+的结合,并确定了基质结合和二元化的关键残留物.

结论:

与DrRecJ相比,DrRecJ-like具有不同的生化活动和更广泛的功能作用.
对DrRecJ样蛋白的结构洞察力为了解NrnA样蛋白的功能提供了基础.
对DrRecJ类的进一步研究可能对了解细菌应激适应和蛋白质功能产生影响.

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