Transcription factor required for the mating response; subunit of the mRNA m6A methyltransferase (MIS) complex, regulating meiosis at multiple steps, early prior to pre-meiotic S phase and late during the completion of meiosis and sporulation; exists in two forms, a slower-migrating form abundant during vegetative growth and a faster-migrating pheromone-induced form; null mutant exhibits abnormal lipid metabolic phenotype; homologous to human METTL14, a subunit of a m6A methyltransferase complex