Background
Guanine nucleotide-binding proteins (G proteins) are involved as a modulator or transducer in various transmembrane signaling systems (Probable). The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein-effector interaction (Probable). Involved in the regulation of plant architecture, panicle erectness, panicle and grain length, grain weight, and grain yield (PubMed:19305410, PubMed:19407986, PubMed:19546322).