G protein activation is prerequisite for functional coupling between Galpha/Gbetagamma and tubulin/microtubules.
Roychowdhury S, Martinez L, Salgado L, Das S, Rasenick MM. G protein activation is prerequisite for functional coupling between Galpha/Gbetagamma and tubulin/microtubules. Biochem Biophys Res Commun. 2006 Feb 10; 340(2):441-8.