Title : Structural evidence for a sequential release mechanism for activation of heterotrimeric G proteins.

Pub. Date : 2009 Nov 6

PMID : 19703466






2 Functional Relationships(s)
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1 For example, mutant Galpha(i1)-T329A shows an 18-fold increase in basal GDP release rate and, when expressed in culture, it causes a significant decrease in forskolin-stimulated cAMP accumulation. Guanosine Diphosphate protein phosphatase 1 regulatory inhibitor subunit 1A Homo sapiens
2 The crystal structure of Galpha(i1)-T329A.GDP shows substantial conformational rearrangement of the switch I region and additional striking alterations of side chains lining the catalytic pocket that disrupt the Mg(+2) coordination sphere and dislodge bound Mg(+2). Guanosine Diphosphate protein phosphatase 1 regulatory inhibitor subunit 1A Homo sapiens