KEGG   ENZYME: 3.2.1.190Help
Entry
EC 3.2.1.190                Enzyme                                 

Name
dioscin glycosidase (3-O-beta-D-Glc-diosgenin-forming);
dioscin-alpha-L-rhamnosidase
Class
Hydrolases;
Glycosylases;
Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
BRITE hierarchy
Sysname
3-O-[alpha-L-Rha-(1->4)-[alpha-L-Rha-(1->2)]-beta-D-Glc]diosgenin (3-O-beta-D-Glc-diosgenin-forming)
Reaction(IUBMB)
3-O-[alpha-L-Rha-(1->4)-[alpha-L-Rha-(1->2)]-beta-D-Glc]diosgenin + 2 H2O = 2 L-rhamnopyranose + diosgenin 3-O-beta-D-glucopyranoside [RN:R10582]
Reaction(KEGG)
Substrate
3-O-[alpha-L-Rha-(1->4)-[alpha-L-Rha-(1->2)]-beta-D-Glc]diosgenin [CPD:C08897];
H2O [CPD:C00001]
Product
L-rhamnopyranose [CPD:C00507];
diosgenin 3-O-beta-D-glucopyranoside [CPD:C20709]
Comment
The enzyme is involved in the hydrolysis of the steroid saponin dioscin by the digestive system of Sus scrofa (pig). cf. EC 3.2.1.189, dioscin glycosidase (diosgenin-forming).
History
EC 3.2.1.190 created 2013
Reference
1  [PMID:16079518]
  Authors
Qian S, Yu H, Zhang C, Lu M, Wang H, Jin F
  Title
Purification and characterization of dioscin-alpha-L-rhamnosidase from pig liver.
  Journal
Chem. Pharm. Bull. (Tokyo). 53 (2005) 911-4.
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 

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