Interacts with SIK1. Expression is detected along the vasculature in cotyledons, hypocotyls and roots of 3- to 4-day-old seedlings. No visible phenotype. Belongs to the MOB1/phocein family. The predicted gene At4g19050 has been split into 2 genes: At4g19045 and At4g19050. The predicted gene At4g19050 has been split into 2 genes: At4g19045 and At4g19050.