Major glucan 1,3-beta-glucosidase required for cell wall integrity (By similarity). Beta-glucanases participate in the metabolism of beta-glucan, the main structural component of the cell wall (By similarity). Can also function biosynthetically as a transglycosylase (By similarity). Functions to deliver glucan from the cell to the extracellular matrix (By similarity). Involved in cell-substrate and cell-cell adhesion (By similarity). Successive hydrolysis of beta-D-glucose units from the non-reducing ends of (1->3)-beta-D-glucans, releasing alpha-glucose. Monomer. Is non-covalently attached to the cell wall. Expression is down-regulated in presence of human keratinocytes. Belongs to the glycosyl hydrolase 5 (cellulase A) family.