Cell-surface associated glycoprotein that acts as a plasma membrane receptor-type protein which senses the presence of matrix. Binds to calmodulin in response to environmental conditions and initiates a signaling cascade that activates CEK1, thus promoting invasive filamentation. Involved in the maintenance of the cell wall. A part becomes cross-linked to the cell wall and thus links the cell wall to the plasma membrane and cytoplasm. The GxxxG glycophorin motif in the transmembrane domain is required for CEK1 activation and subsequent invasive filamentation on agar medium. The cytoplasmic C-terminal calmodulin-binding motif (residues 301 to 317) is important for CEK1 activation and subsequent invasive filamentation on agar medium. Cross-linked to the carbohydrate polymers of the cell wall. O-glycosylated by MNT1 and MNT2. Also N-glycosylated. Shows defects in invasion of agar medium and attenuated virulence in a murine model of disseminated candidiasis. Leads to hypersensibility to the glucan synthase inhibitor capsofungin and the cell wall disturbing agents Congo red and calcofluor white. Belongs to the MID2 like cell wall stress sensor family.