Negative regulator of cell wall integrity (CWI) in unstressed cells, probably by inhibiting protein kinase ksg1/ppk21 activity and regulating their downstream CWI pathways pck2-MAP kinase pathway and protein kinase gad8 pathway. Activity may be regulated by the transient increase of sphingolipid long chain bases (LCBs) during heat stress (By similarity). Phosphorylated by ksg1 and ppk21. Phosphorylation is regulated by sphingolipid long chain bases (LCBs) (By similarity).