在SCFRMF中,SCFRMF调解了化特异性重组酶DMC1的降解
Wanyue Xu1, Yue Yu1, Juli Jing2
1State Key Laboratory of Genetic Engineering and Ministry of Education Key Laboratory of Biodiversity Sciences and Ecological Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, China.
研究人员发现关键的介质蛋白DMC1是如何调节的. 它的稳定性是由蛋白质酶介导的降解控制的,这对于真核生物中适当的介质交叉形成至关重要.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 介质性重组依赖于保留的RECA同源DMC1重组酶.
- 在化过程中,DMC1蛋白水平对其功能至关重要.
- 调节DMC1稳定的机制以前是未知的.
研究的目的:
- 阐明调控DMC1蛋白稳定性的调控机制.
- 确定DMC1降解中的因素.
- 了解DMC1稳定性在介质交叉形成中的作用.
主要方法:
- 研究了Arabidopsis.的26S蛋白酶体对DMC1的降解.
- 确定了F盒蛋白RMF1/2作为DMC1无化媒介.
- 标志着SCFRMF1/2 泛素合酶复合物的特征.
- 进行基因分析以确定涉及RMF1/2,ASK1和DMC1.1的途径.
- 在DMC1上确定了特定的氨酸残留物,这对于无处不在至关重要.
主要成果:
- 通过RMF1/2-依赖的全域化,DMC1降解由26S蛋白酶介导.
- RMF1/2 形成了SCFRMF1/2 随着ASK1.1.的泛素合酶复合体.
- RMF1/2,ASK1和DMC1在介质DNA双链断裂形成的下游途径中起作用.
- 有效的DMC1去除对于成功的介质交叉形成至关重要.
- 在DMC1上,六个氨酸残留物被确定为ubiquitination网站.
结论:
- 这项研究表明,DMC1的稳定性是由无化和蛋白质体降解调节的.
- SCFRMF1/2复合体在介质变化期间控制DMC1水平方面发挥着至关重要的作用.
- 适当调节DMC1稳定性对于真核细胞中精确的介质重组和交叉形成至关重要.
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