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Regulator of G-protein signalling DHEX domain This domain is found in RGS9 (Class C) regulator of G-protein signalling (RGS) protein present in Mus musculus. RGS proteins attenuate heterotrimeric G-protein signalling by enhancing the intrinsic GTPase activity of G-alpha subunits and are vital for proper signal transduction kinetics. The domain is referred to as DEP helical extension (DHEX) because it is located next to N-terminal Dishevelled/Egl-10/Pleckstrin homology (DEP) domain. Both the DEP and DHEX domains are necessary, but not sufficient, to bind anchoring proteins such as RGS9 anchor protein. DHEX has no close structural homologs. This domain is also found in regulator of G-protein signaling 7 (RGS7), the crystal structure of which has been solved.
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PubMed References
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Jiyao W et al.(2023). "The conserved domain database in 2023.",