Luo M, Han Z, Huang G, Li R, Liu Y, Lu J, Liu L, Miao R. Structural comparison of unconventional G protein YchF with heterotrimeric G protein and small G protein.
Plant Signal Behav 2022;
17:2024405. [PMID:
35135414 PMCID:
PMC8959515 DOI:
10.1080/15592324.2021.2024405]
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Abstract
Guanine nucleotide-binding (G) proteins, namely, phosphate-binding (P) loop GTPases, play a critical role in life processes among different species. Based on the structural characteristics, G proteins can be divided into heterotrimeric G proteins, small G proteins and multiple unique unconventional G proteins. The highly conserved unconventional G protein YchF is composed of a core G domain, an inserted coiled-coil domain, and a TGS domain from the N-terminus to the C-terminus. In this review, we compared the structural characteristics of the G domain in rice OsYchF1 with those of Rattus norvegicus heterotrimeric G protein α-subunit and human small G protein Ras-related G protein C and analyzed the binding modes of these G proteins with GTP or ATP by performing molecular dynamics simulations. In summary, it will provide new insights into the enormous diversity of biological function of G proteins.
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