期刊文献+
共找到1篇文章
< 1 >
每页显示 20 50 100
A Crucial Role of the RGS Domain in Trans- Golgi Network Export of AtRGS1 in the Protein Secretory Pathway
1
作者 Guangzhen Hu Yiping Suo Jirong Huang 《Molecular Plant》 SCIE CAS CSCD 2013年第6期1933-1944,共12页
The secretory pathway is responsible for the transport of newly synthesized transmembrane proteins from the endoplasmic reticulum to their destinations via the Golgi/trans-Golgi network (TGN), Cargo proteins at each... The secretory pathway is responsible for the transport of newly synthesized transmembrane proteins from the endoplasmic reticulum to their destinations via the Golgi/trans-Golgi network (TGN), Cargo proteins at each sta- tion are actively sorted by specific sorting signals on the cargo and the corresponding coat complexes. Here, we used the Arabidopsis regulator of G-protein signaling (AtRGS1), which contains an N-terminal potentially sensing glucose seven-transmembrane domain and a C-terminal RGS domain, as a model to uncover sorting motifs required for its cell surface expression. Expression of wild-type and truncated or mutated AtRGS1 fluorescent fusion proteins identified two cysteine residues in the extracellular N-terminus that are essential for endoplasmic reticulum exit and/or correct folding of AtRGS1. The linker between the seven-transmembrane and RGS domains contains an endoplasmic reticulum export signal, whereas the C-terminus is dispensable for the plasma membrane expression of AtRGS1. Interestingly, deletion of the RGS domain results in Golgi/TGN localization of the truncated AtRGS1. Further analysis using site-directed mutagen- esis showed that a tyrosine-based motif embedded in the RGS domain is essential for Golgi/TGN export of AtRGS1. These results reveal a new role for the RGS domain in regulating AtRGS1 trafficking from the Golgi/TGN to the plasma membrane and explain the interaction between the seven-transmembrane and RGS domains. 展开更多
关键词 G-PROTEINS AtRGS1 TGN sorting signal RGS domain Arabidopsis.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部