Entry
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
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
Other DBs
ExPASy - ENZYME nomenclature database: 3.2.1.190