ExplorEnz: EC 3.2.1.191

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3.2.1.191

Accepted name:

ginsenosidase type III

Reaction:

a protopanaxadiol-type ginsenoside with two glucosyl residues at position 3 + 2 H₂O = a protopanaxadiol-type ginsenoside with no glycosidic modification at position 3 + 2 D-glucopyranose (overall reaction)
(1a) a protopanaxadiol-type ginsenoside with two glucosyl residues at position 3 + H₂O = a protopanaxadiol-type ginsenoside with one glucosyl residue at position 3 + D-glucopyranose
(1b) a protopanaxadiol-type ginsenoside with one glucosyl residue at position 3 + H₂O = a protopanaxadiol-type ginsenoside with no glycosidic modification at position 3 + D-glucopyranose

For diagram of protopanaxadiol ginsenosides ginsenosidases, click here

Glossary:

ginsenoside Rb1 = 3β-[β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyloxy]-20-[β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyloxy]dammar-24-en-12β-ol
gypenoside XVII = 3β-(β-D-glucopyranosyloxy)-20-[β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyloxy]dammar-24-en-12β-ol
gypenoside LXXV = 20-[β-D-glucopyranosyl-(1→6)-β-D-glucopyranosyloxy]dammar-24-ene-3β,12β-diol

Systematic name:

protopanaxadiol-type ginsenoside 3-β-D-hydrolase

Comments:

Ginsenosidase type III catalyses the sequential hydrolysis of the 3-O-β-D-(1→2)-glucopyranosyl bond followed by hydrolysis of the 3-O-β-D-glucopyranosyl bond of protopanaxadiol ginsenosides. When acting for example on ginsenoside Rb1 the enzyme first generates ginsenoside XVII, and subsequently ginsenoside LXXV.

Links to other databases:

BRENDA, EXPASY, KEGG, MetaCyc

References:

1.	Jin, X.F., Yu, H.S., Wang, D.M., Liu, T.Q., Liu, C.Y., An, D.S., Im, W.T., Kim, S.G. and Jin, F.X. Kinetics of a cloned special ginsenosidase hydrolyzing 3-O-glucoside of multi-protopanaxadiol-type ginsenosides, named ginsenosidase type III. J. Microbiol. Biotechnol. 22 (2012) 343–351. [PMID: 22450790]
2.	An, D.S., Cui, C.H., Lee, H.G., Wang, L., Kim, S.C., Lee, S.T., Jin, F., Yu, H., Chin, Y.W., Lee, H.K., Im, W.T. and Kim, S.G. Identification and characterization of a novel Terrabacter ginsenosidimutans sp. nov. β-glucosidase that transforms ginsenoside Rb1 into the rare gypenosides XVII and LXXV. Appl. Environ. Microbiol. 76 (2010) 5827–5836. [DOI] [PMID: 20622122]
3.	Hong, H., Cui, C.H., Kim, J.K., Jin, F.X., Kim, S.C. and Im, W.T. Enzymatic Biotransformation of Ginsenoside Rb1 and Gypenoside XVII into Ginsenosides Rd and F2 by Recombinant β-glucosidase from Flavobacterium johnsoniae. J Ginseng Res 36 (2012) 418–424. [DOI] [PMID: 23717145]

[EC 3.2.1.191 created 2014]