Fine-tuning of GPCR activity by receptor-interacting proteins.

Fine-tuning of GPCR activity by receptor-interacting proteins.
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DOI:
10.1038/nrm2803
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发表时间:
2009-12
期刊:
Nature reviews. Molecular cell biology
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G蛋白偶联受体(GPCR)介导对各种配体(如激素、神经递质和感觉刺激)的生理反应。GPCR的信号传导和运输特性通常具有高度可塑性,这取决于细胞环境。在许多情况下,GPCR功能的这种微调可以归因于在不同细胞类型中差异表达的受体相互作用蛋白。在某些情况下,这些GPCR相互作用的伴侣直接介导受体信号传导,而在其他情况下,它们主要作为支架来调节G蛋白介导的信号传导。此外,GPCR相互作用蛋白可以对GPCR运输、定位和/或药理学性质的调节具有很大影响。
G protein-coupled receptors (GPCRs) mediate physiological responses to various ligands, such as hormones, neurotransmitters and sensory stimuli. The signalling and trafficking properties of GPCRs are often highly malleable depending on the cellular context. Such fine-tuning of GPCR function can be attributed in many cases to receptor-interacting proteins that are differentially expressed in distinct cell types. In some cases these GPCR-interacting partners directly mediate receptor signalling, whereas in other cases they act mainly as scaffolds to modulate G protein-mediated signalling. Furthermore, GPCR-interacting proteins can have a big impact on the regulation of GPCR trafficking, localization and/or pharmacological properties.
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