G-protein complex alpha subunit that plays a role in conidiation and regulation of the biosynthesis of secondary metabolites such as dihydroxynaphthalene (DHN)-melanin, via interaction with the G protein-coupled receptor gprM. G proteins are composed of 3 units; alpha, beta and gamma. The alpha chain contains the guanine nucleotide binding site (Probable). Interacts with gprM (PubMed:30914505). Leads to a strong increase of dihydroxynaphthalene (DHN)-melanin production. Belongs to the G-alpha family. G(q) subfamily.