Non-lysosomal glucosylceramidase that catalyzes the hydrolysis of glucosylceramides/GlcCers (such as beta-D-glucosyl-(1<->1')-N-acylsphing-4-enine) to free glucose and ceramides (such as N-acylsphing-4-enine) (PubMed:17105727, PubMed:30308956, PubMed:32144204). GlcCers are membrane glycosphingolipids that have a wide intracellular distribution (By similarity). They are the main precursors of more complex glycosphingolipids that play a role in cellular growth, differentiation, adhesion, signaling, cytoskeletal dynamics and membrane properties (By similarity). Involved in the transglucosylation of cholesterol, transfers glucose from GlcCer to cholesterol, thereby modifying its water solubility and biological properties (PubMed:32144204). Under specific conditions, may catalyze the reverse reaction, transferring glucose from cholesteryl-3-beta-D-glucoside to ceramide (such as N-acylsphing-4-enine) (Probable). May play a role in the metabolism of bile acids (PubMed:11489889, PubMed:9111029, PubMed:17080196). Able to hydrolyze bile acid 3-O-glucosides as well as to produce bile acid-glucose conjugates thanks to a bile acid glucosyl transferase activity (PubMed:11489889, PubMed:9111029, PubMed:17080196). Catalyzes the hydrolysis of galactosylceramides/GalCers (such as beta-D-galactosyl-(1<->1')-N-acylsphing-4-enine), as well as the galactosyl transfer between GalCers and cholesterol in vitro with lower activity compared with their activity against GlcCers (PubMed:32144204). a beta-D-glucosyl-(1<->1')-N-acylsphing-4-enine + H2O = an N-acylsphing-4-enine + D-glucose a beta-D-galactosyl-(1<->1')-N-acylsphing-4-enine + H2O = an N-acylsphing-4-enine + D-galactose beta-D-glucosyl-(1->3)-O-lithocholate + H2O = D-glucose + lithocholate beta-D-glucosyl-(1->3)-O-chenodeoxycholate + H2O = chenodeoxycholate + D-glucose a dolichyl beta-D-glucosyl phosphate + chenodeoxycholate = a dolichyl phosphate + beta-D-glucosyl-(1->3)-O-chenodeoxycholate + H(+) chenodeoxycholate + octyl beta-D-glucose = beta-D-glucosyl-(1->3)-O-chenodeoxycholate + octan-1-ol cholesteryl 3-beta-D-glucoside + H2O = cholesterol + D-glucose a beta-D-glucosyl-(1<->1')-N-acylsphing-4-enine + cholesterol = an N-acylsphing-4-enine + cholesteryl 3-beta-D-glucoside beta-D-glucosyl-N-(9Z-octadecenoyl)-sphing-4E-enine + cholesterol = cholesteryl 3-beta-D-glucoside + N-(9Z-octadecenoyl)-sphing-4-enine a beta-D-galactosyl-(1<->1')-N-acylsphing-4-enine + cholesterol = an N-acylsphing-4-enine + cholesteryl 3-beta-D-galactoside 1-(beta-D-galactosyl)-N-dodecanoylsphing-4-enine + cholesterol = cholesteryl 3-beta-D-galactoside + N-dodecanoylsphing-4-enine Inhibited by AMP-DMN/N -((5-adamantane-1-yl-methoxy)pentyl)-deoxynojirimycin (PubMed:11489889, PubMed:30308956). Activated by Mn(2+), Co(2+) and Mg(2+) and inhibited by Zn(2+) (PubMed:11489889). Enzymatic activity is dependent on membrane association and requires the presence of lipids (PubMed:11489889). The membrane-associated enzyme is not inhibited by condutiriol B epoxide and bromocondutiriol B epoxide (PubMed:11489889). kcat is 2500 min(-1) for the hydrolysis of beta-D-glucosyl-(1->3)-O-lithocholate (PubMed:9111029). kcat is 1300 min(-1) for the hydrolysis of beta-D-glucosyl-(1->3)-O-chenodeoxycholate (PubMed:9111029). kcat is 4700 min(-1) for the hydrolysis of 4-methylumbelliferyl beta-D-glucoside (PubMed:9111029). Optimum pH is 5.0 for the hydrolysis of bile acid glucosides. Lipid metabolism; sphingolipid metabolism. Steroid metabolism; cholesterol metabolism. Localization to the plasma membrane and alternative topologies have also been reported. Widely expressed (PubMed:11489889). Mainly expressed in brain, heart, skeletal muscle, kidney and placenta and expressed at lower levels in liver, spleen, small intestine and lung (PubMed:11489889). Detectable in colon, thymus and peripheral blood leukocytes (PubMed:11489889). The disease is caused by variants affecting the gene represented in this entry. Belongs to the non-lysosomal glucosylceramidase family.