需要对Atg16进行卷轴-卷轴介导的二分化,以便与PROPPIN Atg21结合
Miranda Bueno-Arribas1, Celia Cruz-Cuevas1, María-Angeles Navas2
1Instituto de Investigaciones Biomédicas Sols-Morreale CSIC-UAM, Madrid, 28029, Spain.
Open biology
|November 21, 2023
概括
酵母Atg21和哺乳动物WIPI2蛋白与Atg16/ATG16L1结合,这对自细胞形成至关重要. 这项研究使用RD2H系统确定了Atg21和Atg16中的关键残留物,这些残留物对于这种相互作用至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- PROPPINs/WIPIs是参与膜重塑的β-螺旋蛋白,包括自细胞形成和内贩运.
- 酵母Atg21和哺乳动物WIPI2与Atg16/ATG16L1相互作用,将脂化机制招募到自细胞膜中.
研究的目的:
- 用反向双双混合 (RD2H) 方法识别Atg21和Atg16中关键残留物,这些残留物对于它们的蛋白质-蛋白质结合至关重要.
- 为了研究Atg16卷轴-卷轴域二元化在Atg21结合中的作用.
- 评估WIPI2中确定的残留物的保存情况及其在ATG16L1结合中的作用.
主要方法:
- 反向双双混合 (RD2H) 系统用于识别蛋白质-蛋白质相互作用的关键残留物.
- 蛋白质复杂晶体结构的分析.
- 局部定向突变发生,以产生组合突变.
主要成果:
- 对于Atg21结合,Atg16卷-卷域的二元化是必要的.
- 确定了Atg21中调节ATG16L1结合的保存残留物,与其他自蛋白相互作用中的残留物占有类似的结构位置.
- 证明了RD2H系统在识别相互作用热点和产生完全失去结合的突变物的有效性.
结论:
- RD2H系统是剖析蛋白质与蛋白质相互作用的强大工具.
- 在Atg21和WIPI2中的特定残留物对于结合Atg16/ATG16L1至关重要,突出显示了自过程中保留的相互作用机制.
- 结构性见解表明,自机械内部的蛋白质-蛋白质相互作用接口的融合进化.
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