4.2.1.110: aldos-2-ulose dehydratase

This is an abbreviated version!
For detailed information about aldos-2-ulose dehydratase, go to the full flat file.

Reaction

Synonyms

1,5-anhydro-D-fructose dehydratase (microthecin-forming), aldos-2-ulose dehydratase, aldos-2-ulose dehydratase/isomerase, aldosulose-utilizing enzyme, AUDH, pyranosone dehydratase

ECTree

     4 Lyases

         4.2 Carbon-oxygen lyases

             4.2.1 Hydro-lyases

                4.2.1.110 aldos-2-ulose dehydratase

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Results	in table
2	AA Sequence
2	CAS Registry Number
1	Cloned(Commentary)
2	General Information
1	General Stability
3	Inhibitors
2	KM Value [mM]
2	Metals/Ions
5	Molecular Weight [Da]
10	Natural Substrates/ Products (Substrates)
1	Organic Solvent Stability
13	Organism
3	PDB ID
6	pH Optimum
1	pH Range
2	pI Value
2	Purification (Commentary)
7	Reaction
5	Reaction Type
13	Reference
2	Source Tissue
2	Specific Activity [micromol/min/mg]
1	Storage Stability
23	Substrates and Products (Substrate)
6	Subunits
28	Synonyms
1	Systematic Name
1	Temperature Optimum [°C]

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Natural Substrates Products on EC 4.2.1.110 - aldos-2-ulose dehydratase

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NATURAL SUBSTRATE

NATURAL PRODUCT

REACTION DIAGRAM

ORGANISM

UNIPROT

COMMENTARY
(Substrate)

LITERATURE
(Substrate)

COMMENTARY
(Product)

LITERATURE
(Product)

REVERSIBILITY
r=reversible
ir=irreversible
?=not specified

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

7 entries

glucosone

cortalcerone + H2O

Phanerodontia chrysosporium

P84193

2-keto glucose

690688

-

-

?

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

Gracilariopsis lemaneiformis

-

1,5-anhydro-D-fructose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O (overall reaction), (1a) 1,5-anhydro-D-fructose = 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H2O, (1b) 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one. This enzyme catalyses two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose. The other enzymes involved in this pathway are EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase), EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) and EC 5.3.3.15 (ascopyrone tautomerase). This is a bifunctional enzyme that acts as both a lyase and as an isomerase. Differs from EC 4.2.1.111, which can carry out only reaction 1a

667822, 670508

i.e. microthecin

-

?

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

Microthecium compressum

-

1,5-anhydro-D-fructose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O (overall reaction), (1a) 1,5-anhydro-D-fructose = 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H2O, (1b) 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one. This enzyme catalyses two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose. The other enzymes involved in this pathway are EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase), EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) and EC 5.3.3.15 (ascopyrone tautomerase). This is a bifunctional enzyme that acts as both a lyase and as an isomerase. Differs from EC 4.2.1.111, which can carry out only reaction 1a

667822

i.e. microthecin

-

?

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

Microthecium sobelii

-

1,5-anhydro-D-fructose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O (overall reaction), (1a) 1,5-anhydro-D-fructose = 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H2O, (1b) 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one. This enzyme catalyses two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose. The other enzymes involved in this pathway are EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase), EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) and EC 5.3.3.15 (ascopyrone tautomerase). This is a bifunctional enzyme that acts as both a lyase and as an isomerase. Differs from EC 4.2.1.111, which can carry out only reaction 1a

667822

i.e. microthecin

-

?

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

Morchella costata

-

1,5-anhydro-D-fructose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O (overall reaction), (1a) 1,5-anhydro-D-fructose = 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H2O, (1b) 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one. This enzyme catalyses two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose. The other enzymes involved in this pathway are EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase), EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) and EC 5.3.3.15 (ascopyrone tautomerase). This is a bifunctional enzyme that acts as both a lyase and as an isomerase. Differs from EC 4.2.1.111, which can carry out only reaction 1a

667822

i.e. microthecin

-

?

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

Morchella vulgaris

-

1,5-anhydro-D-fructose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O (overall reaction), (1a) 1,5-anhydro-D-fructose = 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H2O, (1b) 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one. This enzyme catalyses two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose. The other enzymes involved in this pathway are EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase), EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) and EC 5.3.3.15 (ascopyrone tautomerase). This is a bifunctional enzyme that acts as both a lyase and as an isomerase. Differs from EC 4.2.1.111, which can carry out only reaction 1a

667822

i.e. microthecin

-

?

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

Phanerodontia chrysosporium

-

1,5-anhydro-D-fructose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O (overall reaction), (1a) 1,5-anhydro-D-fructose = 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H2O, (1b) 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one. This enzyme catalyses two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose. The other enzymes involved in this pathway are EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase), EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) and EC 5.3.3.15 (ascopyrone tautomerase). This is a bifunctional enzyme that acts as both a lyase and as an isomerase. Differs from EC 4.2.1.111, which can carry out only reaction 1a

667793, 667822

i.e. microthecin

-

?

1,5-anhydro-D-fructose

2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O

Sarcodontia unicolor

-

1,5-anhydro-D-fructose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one + H2O (overall reaction), (1a) 1,5-anhydro-D-fructose = 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose + H2O, (1b) 1,5-anhydro-4-deoxy-D-glycero-hex-3-en-2-ulose = 2-hydroxy-2-(hydroxymethyl)-2H-pyran-3(6H)-one. This enzyme catalyses two of the steps in the anhydrofructose pathway, which leads to the degradation of glycogen and starch via 1,5-anhydro-D-fructose [1,2]. The other enzymes involved in this pathway are EC 4.2.1.111 (1,5-anhydro-D-fructose dehydratase), EC 4.2.2.13 (exo-(1,4)-alpha-D-glucan lyase) and EC 5.3.3.15 (ascopyrone tautomerase). This is a bifunctional enzyme that acts as both a lyase and as an isomerase. Differs from EC 4.2.1.111, which can carry out only reaction 1a

667822

i.e. microthecin

-

?