Required for normal levels of the cell wall 1,6-beta-glucan. Involved in a protein folding machinery chaperoning proteins acting in various physiological processes including cell wall synthesis and lysis of autophagic bodies. Controls actin cytoskeleton polarization to the mother-bud neck and CLB2 protein stability. N-glycosylated. Present with 2360 molecules/cell in log phase SD medium. Belongs to the ROT1 family.