Involved in the synthesis of (1->6)- and (1->3)-beta-D-glucan polymers of the yeast cell wall in vivo. It is required for full activity of beta-glucan synthase in vitro. May be involved in the maturation and transport of cell wall proteins (CWP) to the cell wall. May act as a transglucosidase and contribute to the construction of a protein-bound glucan-structure that acts as an acceptor site for the addition of (1->6)-beta-D-glucan at the cell surface. The cytoplasmic domain interacts with the actin patch assembly proteins LAS17 and SLA1. Interacts with KEG1. Present with 4760 molecules/cell in log phase SD medium. Belongs to the SKN1/KRE6 family.