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Your query returned 2 entries. Printable version
EC | 3.2.1.193 | ||
Accepted name: | ginsenosidase type I | ||
Reaction: | (1) 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 (2) a protopanaxadiol-type ginsenoside with one glucosyl residue at position 3 + H2O = a protopanaxadiol-type ginsenoside with no glycosidic modifications at position 3 + D-glucopyranose (3) a protopanaxadiol-type ginsenoside with two glycosyl residues at position 20 + H2O = a protopanaxadiol-type ginsenoside with a single glucosyl residue at position 20 + a monosaccharide |
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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 ginsenoside Rb2 = 3β-[β-D-glucopyranosyl-(1→2)-β-D glucopyranosyloxy]-20-[α-L-arabinopyranosyl-(1→6)-β-D glucopyranosyloxy]dammar-24-en-12β-ol ginsenoside Rb3 = 3β-[β-D-glucopyranosyl-(1→2)-β-D glucopyranosyloxy]-20-[β-D-xylopyranosyl-(1→6)-β-D glucopyranosyloxy]dammar-24-en-12β-ol ginsenoside Rc = 3β-[β-D-glucopyranosyl-(1→2)-β-D glucopyranosyloxy]-20-[α-L-arabinofuranosyl-(1→6)-β-D glucopyranosyloxy]dammar-24-en-12β-ol ginsenoside Rd = 3β-[β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyloxy]-20-(β-D-glucopyranosyloxy)dammar-24-en-12β-ol ginsenoside F2 = 3β,20-bis(β-D-glucopyranosyloxy)dammar-24-en-12β-ol ginsenoside C-K = 20β-(β-D-glucopyranosyloxy)dammar-24-ene-3β,12β-diol ginsenoside Rh2 = 3β-(β-D-glucopyranosyloxy)dammar-24-ene-12β,20-diol |
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Systematic name: | ginsenoside glucohydrolase | ||
Comments: | Ginsenosidase type I is slightly activated by Mg2+ or Ca2+ [1]. The enzyme hydrolyses the 3-O-β-D-(1→2)-glucosidic bond, the 3-O-β-D-glucopyranosyl bond and the 20-O-β-D-(1→6)-glycosidic bond of protopanaxadiol-type ginsenosides. It usually leaves a single glucosyl residue attached at position 20 and one or no glucosyl residues at position 3. Starting with a ginsenoside that is glycosylated at both positions (e.g. ginsenoside Rb1, Rb2, Rb3, Rc or Rd), the most common products are ginsenoside F2 and ginsenoside C-K, with low amounts of ginsenoside Rh2. | ||
Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||
References: |
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EC | 3.2.1.195 | ||
Accepted name: | 20-O-multi-glycoside ginsenosidase | ||
Reaction: | a protopanaxadiol-type ginsenoside with two glycosyl residues at position 20 + H2O = a protopanaxadiol-type ginsenoside with a single glucosyl residue at position 20 + a monosaccharide | ||
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 ginsenoside Rb2 = 3β-[β-D-glucopyranosyl-(1→2)-β-D glucopyranosyloxy]-20-[α-L-arabinopyranosyl-(1→6)-β-D glucopyranosyloxy]dammar-24-en-12β-ol ginsenoside Rb3 = 3β-[β-D-glucopyranosyl-(1→2)-β-D glucopyranosyloxy]-20-[β-D-xylopyranosyl-(1→6)-β-D glucopyranosyloxy]dammar-24-en-12β-ol ginsenoside Rc = 3β-[β-D-glucopyranosyl-(1→2)-β-D glucopyranosyloxy]-20-[α-L-arabinofuranosyl-(1→6)-β-D glucopyranosyloxy]dammar-24-en-12β-ol ginsenoside Rd = 3β-[β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyloxy]-20-(β-D-glucopyranosyloxy)dammar-24-en-12β-ol ginsenoside Rg3 = 3β-[β-D-glucopyranosyl-(1→2)-β-D-glucopyranosyloxy]-20-(β-D-glucopyranosyloxy)dammar-24-ene-12β,20-diol |
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Other name(s): | ginsenosidase type II (erroneous) | ||
Systematic name: | protopanaxadiol-type ginsenoside 20-β-D-glucohydrolase | ||
Comments: | The 20-O-multi-glycoside ginsenosidase catalyses the hydrolysis of the 20-O-α-(1→6)-glycosidic bond and the 20-O-β-(1→6)-glycosidic bond of protopanaxadiol-type ginsenosides. The enzyme usually leaves a single glucosyl residue attached at position 20, although it can cleave the remaining glucosyl residue with a lower efficiency. Starting with a ginsenoside that is glycosylated at positions 3 and 20, such as ginsenosides Rb1, Rb2, Rb3 and Rc, the most common product is ginsenoside Rd, with a low amount of ginsenoside Rg3 also formed. | ||
Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc | ||
References: |
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