G protein‐coupled receptors: a count of 1001 conformations

G protein‐coupled receptors: a count of 1001 conformations
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G 蛋白偶联受体:1001 种构象

DOI:
10.1111/j.1472-8206.2005.00319.x
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发表时间:
2005
影响因子:
2.9
通讯作者:
I. Liefde
I. Liefde
中科院分区:
医学4区
文献类型:
--
作者:
Georges Vauquelin;I. Liefde

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G蛋白偶联受体(GPCR)最初被认为具有非活性和活性构象,并激活单一类型的G蛋白。对重组细胞系统的研究导致了更复杂的情况。首先,GPCR可以激活不同的G蛋白种类。其次,GPCR多态模型已被调用来解释其复杂的行为,在激动剂,拮抗剂和其他结合伙伴的存在。GPCR激活和拮抗剂结合过程中的中间受体构象状态的发生建议荧光测量和研究与组成型活性受体突变体和不可逾越的拮抗剂。不同的激动剂可以通过指示其对某些G蛋白的偏好(即“激动剂运输”)通过单个受体触发不同的效应器途径。结构修饰和外源性和内源性(例如其他细胞蛋白质、脂质)变构调节剂也影响配体-GPCR相互作用和受体活化。GPCR研究的这些新进展可能导致开发更具选择性的治疗药物。
G protein‐coupled receptors (GPCRs) were initially regarded to adopt an inactive and an active conformation and to activate a single type of G protein. Studies with recombinant cell systems have led to a more complex picture. First, GPCRs can activate distinct G protein species. Second, GPCR multistate models have been invoked to explain their complex behaviour in the presence of agonists, antagonists and other binding partners. The occurrence of intermediate receptor conformational states during GPCR activation and antagonist binding is suggested by fluorescence measurements and studies with constitutively active receptor mutants and insurmountable antagonists. Different agonists may trigger distinct effector pathways through a single receptor by dictating its preference for certain G proteins (i.e. ‘agonist trafficking’). Structural modification and exogenous and endogenous (e.g. other cellular proteins, lipids) allosteric modulators also affect ligand–GPCR interaction and receptor activation. These new developments in GPCR research could lead to the development of more selective therapeutic drugs.
DOI: 10.1016/s0021-9258(18)53442-6
发表时间: 1993-03
期刊: The Journal of biological chemistry
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