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Information on EC 4.2.1.105 - 2-hydroxyisoflavanone dehydratase and Organism(s) Glycyrrhiza echinata and UniProt Accession Q5NUF4

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EC Tree
     4 Lyases
         4.2 Carbon-oxygen lyases
             4.2.1 Hydro-lyases
                4.2.1.105 2-hydroxyisoflavanone dehydratase
IUBMB Comments
Catalyses the final step in the formation of the isoflavonoid skeleton. The reaction also occurs spontaneously.
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Select one or more organisms in this record: ?
This record set is specific for:
Glycyrrhiza echinata
UNIPROT: Q5NUF4
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Word Map
The taxonomic range for the selected organisms is: Glycyrrhiza echinata
The enzyme appears in selected viruses and cellular organisms
Synonyms
2-hydroxyisoflavanone dehydratase, gmhid, more
PATHWAY SOURCE
PATHWAYS
-
-, -, -, -
SYSTEMATIC NAME
IUBMB Comments
2,7,4'-trihydroxyisoflavanone hydro-lyase (daidzein-forming)
Catalyses the final step in the formation of the isoflavonoid skeleton. The reaction also occurs spontaneously.
CAS REGISTRY NUMBER
COMMENTARY hide
166800-10-8
-
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
2,5,7,4'-tetrahydroxyisoflavanone
genistein + H2O
show the reaction diagram
activity is 0.5% of the activity with 2,7-dihydroxy-4'-methoxyisoflavanone
-
-
?
2,7,4'-trihydroxyisoflavanone
daidzein + H2O
show the reaction diagram
activity is 0.5% of the activity with 2,7-dihydroxy-4'-methoxyisoflavanone
-
-
?
2,7-dihydroxy-4'-methoxyisoflavanone
formononetin + H2O
show the reaction diagram
-
-
-
?
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.304
2,5,7,4'-tetrahydroxyisoflavanone
pH 7.5, 30°C
0.21
2,7,4'-trihydroxyisoflavanone
pH 7.5, 30°C
0.058
2,7-dihydroxy-4'-methoxyisoflavanone
pH 7.5, 30°C
TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.19
2,5,7,4'-tetrahydroxyisoflavanone
pH 7.5, 30°C
0.12
2,7,4'-trihydroxyisoflavanone
pH 7.5, 30°C
9.8
2,7-dihydroxy-4'-methoxyisoflavanone
pH 7.5, 30°C
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
expressed in Escherichia coli
SwissProt
Manually annotated by BRENDA team
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
HIDM_GLYEC
328
0
36061
Swiss-Prot
other Location (Reliability: 3)
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Akashi, T.; Aoki, T.; Ayabe, S.
Molecular and biochemical characterization of 2-hydroxyisoflavanone dehydratase. Involvement of carboxylesterase-like proteins in leguminous isoflavone biosynthesis
Plant Physiol.
137
882-891
2005
Glycine max (Q5NUF3), Glycine max, Glycyrrhiza echinata (Q5NUF4), Glycyrrhiza echinata
Manually annotated by BRENDA team