Two chaperones locked in an embrace: structure and function of the ribosome-associated complex RAC
Two chaperones locked in an embrace: structure and function of the ribosome-associated complex RAC
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两个伴侣紧紧相拥:核糖体相关复合物 RAC 的结构和功能
DOI:
10.1038/nsmb.3435
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发表时间:
2017
期刊:
影响因子:
--
通讯作者:
Rospert
中科院分区:
文献类型:
--
作者:
Sinning;Rospert
Chaperones, which assist protein folding are essential components of every living cell. The yeast ribosome-associated complex (RAC) is a chaperone that is highly conserved in eukaryotic cells. The RAC consists of the J protein Zuo1 and the unconventional Hsp70 homolog Ssz1. The RAC heterodimer stimulates the ATPase activity of the ribosome-bound Hsp70 homolog Ssb, which interacts with nascent polypeptide chains to facilitatede novoprotein folding. In addition, the RAC–Ssb system is required to maintain the fidelity of protein translation. Recent work reveals important details of the unique structures of RAC and Ssb and identifies how the chaperones interact with the ribosome. The new findings start to uncover how the exceptional chaperone triad cooperates in protein folding and maintenance of translational fidelity and its connection to extraribosomal functions.
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