Is there a common allosteric binding site for G-protein coupled receptors?

Is there a common allosteric binding site for G-protein coupled receptors?
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DOI:
10.1007/s10822-022-00454-5
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发表时间:
2022-06
影响因子:
3.5
通讯作者:
--
中科院分区:
生物学3区
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--
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针对 G 蛋白偶联受体 (GPCR) 上的变构位点进行药物发现引起了越来越多的兴趣。给定 GPCR 靶标,识别其中的变构结合位点仍然是一个挑战。我们和其他实验室之前的工作表明,与 G 蛋白结合位点空间重叠的跨膜 (TM) 结构域中部下方的细胞内区域可能包含所有 GPCR 的共同变构位点。我们在此网站上对 100 多个具有代表性的人类 GPCR 结构进行了多次生物信息学分析。研究结果证实,所提出的区域包含一个可对 89% GPCR 进行药物化的变构位点,并且 GPCR 与 94% GPCR 的最相似同源物之间并非 100% 相同。该位点的理化性质和氨基酸组成在 GPCR 类别之间和内部有所不同。由于这个提议的区域占据了所有已知结构的 GPCR 中存在的空间,因此它可以代表所有 GPCR 的变构位点的共同宿主,这些 GPCR 可以作为基于结构的变构药物设计的目标。
Targeting the allosteric sites on G-protein coupled receptors (GPCRs) for drug discovery is attracting increased interest. Given a GPCR target, identifying the allosteric binding sites in it remains a challenge. Previous works from our and other labs suggest the intracellular region below the middle of the transmembrane (TM) domain that spatially overlaps with the G-protein binding site could contain a common allosteric site for all GPCRs. We performed several bioinformatics analyses on this site for more than 100 representative human GPCR structures. Results of the studies confirmed that the proposed region contains an allosteric site that is druggable for 89% of the GPCRs and is not 100% identical between a GPCR and its most similar homolog for 94% of the GPCRs. The physico-chemical properties and amino acid composition of this site vary among and within GPCR classes. Since this proposed region occupies the space existing in all GPCRs of known structure, it could represent a common host of an allosteric site for all GPCRs that can be targeted for structure-based allosteric drug design.
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