Mst50 is an adapter protein involved in the Pmk1 MAPK, Mps1 MAPK, and Osm1 MAPK pathways (Li et al., 2017), suggesting that PoRal2 possibly plays its physiological functions in appressorium formation and infection via the Mps1 MAPK and Osm1 MAPK pathways. This evidence concerns the gene MPEG1 and infection.