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- W1978484897 abstract "GRKs play a key role in regulating G protein-coupled receptor (GPCR) responsiveness. To investigate the role of GRKs in desensitization of TP, we replaced threonines with favorable phosphorylation motifs for GRKs (positions 226 and 230) with alanine. Mutant and wild-type receptors were expressed in cell culture models and clones expressing similar numbers of receptors were studied. We found that: (1) affinity and specificity of thromboxane A2 (TxA2) binding to mutant TP were identical to the wild-type, (2) replacement of threonines 226 and 230 with alanines delayed the onset of agonist-induced desensitization, and (3) inhibition of endogenous GRK activity with a dominant-negative construct inhibited agonist-induced phosphorylation and enhanced responsiveness of wild-type TP but had little effect on responsiveness of the receptor mutant. These data are consistent with the notion that GRKs contribute to desensitization of TP." @default.
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- W1978484897 date "2002-09-01" @default.
- W1978484897 modified "2023-09-27" @default.
- W1978484897 title "Desensitization of the mouse thromboxane A2 receptor (TP) by G protein-coupled receptor kinases (GRKs)" @default.
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- W1978484897 doi "https://doi.org/10.1016/s0090-6980(02)00013-8" @default.
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