GTP-Binding Protein alpha Subunits
G Protein alpha Subunit
G-Protein alpha Subunit
GTP Binding Protein alpha Subunit
GTP Binding Protein alpha Subunits
GTP-Binding Protein alpha Subunit
alpha Subunit, G-Protein
The GTPase-containing subunits of heterotrimeric GTP-binding proteins. When dissociated from the heterotrimeric complex these subunits interact with a variety of second messenger systems. Hydrolysis of GTP by the inherent GTPase activity of the subunit causes it to revert to its inactive (heterotrimeric) form. The GTP-Binding protein alpha subunits are grouped into families according to the type of action they have on second messenger systems.