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- W2095996812 abstract "Like for most transmembrane proteins, translation of G protein-coupled receptors (GPCRs) mRNA takes place at the endoplasmic reticulum (ER) where they are synthesized, folded and assembled. The molecular mechanisms involved in the transport process of GPCRs from ER to the plasma membrane are poorly investigated. Here we studied the mechanisms involved in glycosylation-dependent cell surface expression and quality control of the receptor for Vasoactive Intestinal Polypeptide (VIP) VPAC1, a member of the B family of GPCRs. Using biochemical and pharmacological techniques and fluorescence microscopy, we have shown that only a fraction of newly synthesized VPAC1 attains properly conformation that allows their cell surface targeting. Misfolded or immature VPAC1 are taken in charge by co- and post-translational quality control that involves: 1) calnexin-dependent folding strictly through a glycan-dependent mechanism, 2) BiP-dependant folding, 3) translocation to the cytoplasm and proteasome-dependent degradation of improper proteins, and 4) post-ER quality control check points. Our data suggest that VPAC1 expression/trafficking pathways are under the control of complex and precise molecular mechanisms to ensure that only proper VPAC1 reaches the cell surface." @default.
- W2095996812 created "2016-06-24" @default.
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- W2095996812 date "2008-09-01" @default.
- W2095996812 modified "2023-10-10" @default.
- W2095996812 title "Cell surface targeting of VPAC1 receptors: Evidence for implication of a quality control system and the proteasome" @default.
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- W2095996812 doi "https://doi.org/10.1016/j.bbamcr.2008.03.013" @default.
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