ceramide glucosyltransferase activity Reactome:R-HSA-1638104 GO:0008120 glucosylceramide synthase activity MetaCyc:CERAMIDE-GLUCOSYLTRANSFERASE-RXN UDPglucose:N-acylsphingosine D-glucosyltransferase activity ceramide:UDPGlc glucosyltransferase activity Catalysis of the reaction: an N-acylsphing-4-enine + UDP-alpha-D-glucose = a beta-D-glucosyl-(1<->1')-N-acylsphing-4-enine + H+ + UDP. EC:2.4.1.80 UDP-glucose:N-acylsphingosine D-glucosyltransferase activity UDP-glucose:ceramide glucosyltransferase activity uridine diphosphoglucose-ceramide glucosyltransferase activity UDP-glucose-ceramide glucosyltransferase activity RHEA:12088 ceramide:UDP-glucose glucosyltransferase activity molecular_function UDP-glucosyltransferase activity