Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10870279 | FEBS Letters | 2015 | 10 Pages |
Abstract
Investigation of post-translational modifications of receptor proteins is important for our understanding of receptor pharmacology and disease physiology. However, our knowledge about post-translational modifications of class C G protein-coupled receptors and how these modifications regulate expression and function is very limited. Herein, we show that the nutrient-sensing class C G protein-coupled receptor GPRC6A carries seven N-glycans and that one of these sites modulates surface expression whereas mutation of another site affects receptor function. GPRC6A has been speculated to form covalently linked dimers through cysteine disulfide linkage in the extracellular amino-terminal domain and here we show that GPRC6A indeed is a homodimer and that a disulfide bridge between the C131 residues is formed.
Keywords
DPBSGPCRHBSSCRD7TMECDTBSVFTHEKGPRC6ADTTEtOHIP1Post-translational modification (PTM)BSAG protein-coupled receptor (GPCR)N-linked glycosylationbovine serum albuminEthanolDimerizationTris buffered salineELISAEnzyme-linked immunosorbent assayextracellular domaincysteine-rich domainRoom temperatureDisulfidedithiothreitolendoplasmic reticulumdulbecco’s phosphate-buffered salineHanks’ balanced salt solutionwild-typeSignal transductionseven transmembranehemagglutininVenus flytraphuman embryonic kidneyG protein-coupled receptor
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Authors
Lenea Nørskov-Lauritsen, Stine Jørgensen, Hans Bräuner-Osborne,