期刊
NATURE
卷 524, 期 7564, 页码 173-+出版社
NATURE PORTFOLIO
DOI: 10.1038/nature14663
关键词
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资金
- Medical Research Council [MC_U105185859, MC_U105197215]
- Swiss National Science Foundation [141898, 133810, 31-135754]
- MRC Centenary Award
- AFR scholarship from Luxembourg National Research Fund
- Boehringer Ingelheim Fond
- Medical Research Council [1274107, MC_U105197215, MC_U105185859] Funding Source: researchfish
- MRC [MC_U105197215, MC_U105185859] Funding Source: UKRI
G protein-coupled receptors (GPCRs) allosterically activate heterotrimeric G proteins and trigger GDP release. Given that there are similar to 800 human GPCRs and 16 different G alpha genes, this raises the question of whether a universal allosteric mechanism governs G alpha activation. Here we show that different GPCRs interact with and activate G alpha proteins through a highly conserved mechanism. Comparison of G alpha with the small G protein Ras reveals how the evolution of short segments that undergo disorder-to-order transitions can decouple regions important for allosteric activation from receptor binding specificity. This might explain how the GPCR-G alpha system diversified rapidly, while conserving the allosteric activation mechanism.
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