在介质重组和小鼠精子生成中,ANKRD31-REC114相互作用的重要作用
Jiaqi Xu1,2, Tao Li2, Soonjoung Kim2
1Biochemistry, Cell, and Molecular Biology (BCMB) Allied Program, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065.
概括
在 ANKRD31 蛋白质中,
科学领域:
- 介质变化和染色体分离的发生.
- DNA双链断裂 (DSB) 的形成和修复.
- 同类的重组组合.
背景情况:
- 介质DNA双链断裂 (DSB) 对于适当的染色体分离至关重要.
- ANKRD31调节了DSB的时间,数量和位置,特别是在性染色体的伪自体区域 (PAR).
- 假设ANKRD31可以作为支架蛋白,与REC114.4.等因素相互作用.
研究的目的:
- 在体内研究ANKRD31-REC114相互作用的功能重要性.
- 确定破坏这种相互作用如何影响DSB形成,重组和染色体分离.
- 阐明ANKRD31作为介质过程中的支架的作用.
主要方法:
- 产生具有特定Ankrd31突变 (误解和C端切断) 的小鼠来调节ANKRD31-REC114相互作用.
- 在突变小鼠中分析介质性进展,DSB形成,重组和DSB局部化.
- 评估ANKRD31与其他蛋白质合作伙伴的相互作用.
主要成果:
- 完全破坏ANKRD31-REC114相互作用表Ankrd31的零突变,导致延迟的DSB,受损的重组和改变的DSB位置.
- 对ANKRD31-REC114相互作用的部分干扰导致延迟DSB形成,但在很大程度上保留了重组和正常的DSB位置.
- 观察到一种剂量效应,中间表型与相互作用中断的程度相关.
结论:
- ANKRD31的介质功能严重依赖于它与REC114.14的相互作用.
- ANKRD31功能障碍的严重程度与其与REC114.1的相互作用中断的程度相关.
- ANKRD31作为一个关键的支架,与REC114的相互作用是其在调节介质DSBs的作用的关键.
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