The plastid-encoded protein Orf2971 is required for protein translocation and chloroplast quality control.
The plastid-encoded protein Orf2971 is required for protein translocation and chloroplast quality control.
复制标题
质体编码蛋白 Orf2971 是蛋白质易位和叶绿体质量控制所必需的
DOI:
10.1093/plcell/koac180
复制
发表时间:
2022-08-25
期刊:
影响因子:
--
通讯作者:
中科院分区:
文献类型:
--
作者:
Photosynthesis and the biosynthesis of many important metabolites occur in chloroplasts. In these semi-autonomous organelles, the chloroplast genome encodes approximately 100 proteins. The remaining chloroplast proteins, close to 3,000, are encoded by nuclear genes whose products are translated in the cytosol and imported into chloroplasts. However, there is still no consensus on the composition of the protein import machinery including its motor proteins and on how newly imported chloroplast proteins are refolded. In this study, we have examined the function of orf2971, the largest chloroplast gene of Chlamydomonas reinhardtii. The depletion of Orf2971 causes the accumulation of protein precursors, partial proteolysis and aggregation of proteins, increased expression of chaperones and proteases, and autophagy. Orf2971 interacts with the TIC (translocon at the inner chloroplast envelope) complex, catalyzes ATP (adenosine triphosphate) hydrolysis, and associates with chaperones and chaperonins. We propose that Orf2971 is intimately connected to the protein import machinery and plays an important role in chloroplast protein quality control. Repression of Orf2971 induces accumulation of chloroplast precursor proteins and impaired chloroplast quality indicating that Orf2971 is required for protein import and chloroplast quality control.
登录
查看更多内容
影响因子:
11.6
作者:
Lee, Sookjin;Lee, Dong Wook;Hwang, Inhwan
通讯作者:
Hwang, Inhwan
影响因子:
4.3
作者:
Dinc, Emine;Ramundo, Silvia;Rochaix, Jean-David
通讯作者:
Rochaix, Jean-David
影响因子:
4.8
作者:
Dickson, R;Weiss, C;Viitanen, PV
通讯作者:
Viitanen, PV
影响因子:
56.9
作者:
Ling, Qihua;Huang, Weihua;Jarvis, Paul
通讯作者:
Jarvis, Paul
影响因子:
64.8
作者:
Croft, MT;Lawrence, AD;Smith, AG
通讯作者:
Smith, AG