Glucosylceramidase - P04062 (GLCM_HUMAN)


Protein Feature View of PDB entries mapped to a UniProtKB sequence  

Glucosylceramidase that catalyzes, within the lysosomal compartment, the hydrolysis of glucosylceramide/GlcCer into free ceramide and glucose (PubMed:9201993, PubMed:24211208, PubMed:15916907). Thereby, plays a central role in the degradation of complex lipids and the turnover of cellular membranes (PubMed:27378698). Through the production of ceramides, participates in the PKC-activated salvage pathway of ceramide formation (PubMed:19279011). Also plays a role in cholesterol metabolism (PubMed:24211208, PubMed:26724485). May either catalyze the glucosylation of cholesterol, through a transglucosylation reaction that transfers glucose from glucosylceramide to cholesterol (PubMed:24211208, PubMed:26724485). The short chain saturated C8:0-GlcCer and the mono-unsaturated C18:0-GlcCer being the most effective glucose donors for that transglucosylation reaction (PubMed:24211208). Under specific conditions, may alternatively catalyze the reverse reaction, transferring glucose from cholesteryl-beta-D-glucoside to ceramide (PubMed:26724485). Finally, may also hydrolyze cholesteryl-beta-D-glucoside to produce D-glucose and cholesterol (PubMed:24211208, PubMed:26724485). UniProt
Catalytic Activity
a beta-D-glucosyl-1<->1'-N-acylsphing-4-enine + cholesterol = an N-acylsphing-4-enine + cholesteryl 3-beta-D-glucoside UniProt
Pathway Maps
      ESCHER  BiGG
Subunit Structure
Interacts with saposin-C (PubMed:10781797). Interacts with SCARB2 (PubMed:18022370). Interacts with TCP1 (PubMed:21098288). May interact with SNCA; may inhibit the glucosylceramidase activity (PubMed:23266198). Interacts with GRN; this interaction prevents aggregation of GBA-SCARB2 complex via interaction with HSPA1A upon stress (PubMed:27789271). UniProt
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