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EC 3.2.1.190 Details

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EC number

3.2.1.190

Accepted name

dioscin glycosidase (3-O-β-D-Glc-diosgenin-forming)

Reaction

3-O-[α-L-Rha-(1→4)-[α-L-Rha-(1→2)]-β-D-Glc]diosgenin + 2 H₂O = 2 L-rhamnopyranose + diosgenin 3-O-β-D-glucopyranoside

Other name(s)

dioscin-α-L-rhamnosidase

Systematic name

3-O-[α-L-Rha-(1→4)-[α-L-Rha-(1→2)]-β-D-Glc]diosgenin (3-O-β-D-Glc-diosgenin-forming)

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

created 2013

EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

1.2 Acting on the aldehyde or oxo group of donors

1.3 Acting on the CH-CH group of donors

1.4 Acting on the CH-NH₂ group of donors

1.5 Acting on the CH-NH group of donors

1.5.1 With NAD⁺ or NADP⁺ as acceptor

1.5.3 With oxygen as acceptor

1.5.4 With a disulfide as acceptor

1.5.5 With a quinone or similar compound as acceptor

1.5.7 With an iron-sulfur protein as acceptor

1.5.8 With a flavin or flavoprotein as acceptor

1.5.98 With other, known, physiological acceptors

1.5.98.1 methylenetetrahydromethanopterin dehydrogenase

1.5.98.2 5,10-methylenetetrahydromethanopterin reductase

1.5.98.3 coenzyme F₄₂₀:methanophenazine dehydrogenase

1.5.99 With unknown physiological acceptors

1.6 Acting on NADH or NADPH

1.7 Acting on other nitrogenous compounds as donors

1.8 Acting on a sulfur group of donors

1.9 Acting on a heme group of donors

1.10 Acting on diphenols and related substances as donors

1.11 Acting on a peroxide as acceptor

1.12 Acting on hydrogen as donor

1.12.1 With NAD⁺ or NADP⁺ as acceptor

1.12.2 With a cytochrome as acceptor

1.12.5 With a quinone or similar compound as acceptor

1.12.7 With an iron-sulfur protein as acceptor

1.12.98 With other, known, physiological acceptors

1.12.99 With unknown physiological acceptors

1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)

1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen

1.15 Acting on superoxide as acceptor

1.16 Oxidizing metal ions

1.17 Acting on CH or CH₂ groups

1.18 Acting on iron-sulfur proteins as donors

1.19 Acting on reduced flavodoxin as donor

1.20 Acting on phosphorus or arsenic in donors

1.21 Catalysing the reaction X-H + Y-H = X-Y

1.21.1 With NAD⁺ or NADP⁺ as acceptor

1.21.3 With oxygen as acceptor

1.21.4 With a disulfide as acceptor

1.21.98 With other, known, physiological acceptors

1.21.99 With unknown physiological acceptors

1.22 Acting on halogen in donors

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.97.1 Sole sub-subclass for oxidoreductases that do not belong in the other subclasses

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)