The N-terminal and third transmembrane domain of PsCor413im1 are essential for targeting to chloroplast envelope membrane
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2020
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Abstract
Cold-regulated (COR) genes, located downstream of the C-repeat binding factors (CBFs) in cold signaling pathways, play a central role in plant response to cold stress. In our previous studies, a Cor413 chloroplast envelope membrane protein, PsCor413im1, was identified from the cold-tolerant plant Phlox subulata. Its overexpression enhanced cold tolerance and altered AtCor15 expression in Arabidopsis. In the present study, the function of PsCor413im1 was further investigated. Transmission electron microscope observation showed that the chloroplast envelope membrane of cold-treated transgenic Arabidopsis seedlings was more stable than that of cold-treated wild-type seedlings. Subcellular localization of green fluorescent protein as a marker revealed that the N-terminal and putative third transmembrane domain (TMD) of PsCor413im1 were essential for its targeting of the chloroplast envelope membrane. Furthermore, overexpression of PsCor413im1 fragments containing N-terminal and third TMD also altered the expression of AtCor15 genes in Arabidopsis. Overall, our results suggest that PsCor413im1 may stabilize the chloroplast envelope membrane under cold stress, and its N-terminal and third TMD are important for its targeting capability and function.
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zhou2020biochemicalthe
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| Authors | Jingang Wang,Shengyue Dai,Hongwei Sun,Enhui Liu,Mi Zhou,Shuang Feng,Kun Qiao,Shufang Gong,Aimin Zhou;Jingang Wang;Shengyue Dai;Hongwei Sun;Enhui Liu;Mi Zhou;Shuang Feng;Kun Qiao;Shufang Gong;Aimin Zhou; |
| Journal | Biochemical and biophysical research communications |
| Year | 2020 |
| DOI |
10.1016/j.bbrc.2020.05.046
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