Molecular regulation of lysophosphatidic acid receptor 1 trafficking to the cell surface.
Molecular regulation of lysophosphatidic acid receptor 1 trafficking to the cell surface.
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分子调节溶血磷脂酸受体1运输到细胞表面。
DOI:
10.1016/j.cellsig.2014.07.005
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发表时间:
2014-11
影响因子:
4.8
通讯作者:
Zhao Y
中科院分区:
文献类型:
--
作者:
Zhao J;Wei J;Bowser RK;Dong S;Xiao S;Zhao Y
The lysophosphatidic acid receptor 1 (LPA1), a G-protein coupled receptor, regulates cell proliferation, migration, and cytokine release. Here, we investigate the molecular signature of LPA1 trafficking to the cell surface. The overexpressed LPA1 with a C-terminal V5 tag (LPA1-V5) is majorly expressed on the cell surface, while two deletion mutants (C320 and Δ84–87) failed to be trafficked to the cell surface. Further, site-directed mutagenesis analysis of the LPA1 revealed that Ile325, Tyr85, and Leu87 within these two fragments regulate LPA1 maturation and trafficking to the cell surface. Over-expression of Sar1, a component of coat protein complex II (COPII), enhances glycosylation of LPA1 wild type, but not these mutants. The mutants of LPA1 are majorly localized in the endoplasmic reticulum (ER) and exhibit a higher binding affinity to heat shock protein 70 (Hsp70), when compared to the LPA1 wild type. Further, we found that all these mutants failed to increase phosphorylation of Erk, and the cytokine release in response to LPA treatment. These results suggest that Ile325, Tyr85, and Leu87 within LPA1 are essential for LPA1protein properly folding in the ER.
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DOI:
10.1073/pnas.1106129108
发表时间:
2011-09-13
影响因子:
11.1
作者:
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影响因子:
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影响因子:
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