4.2.1.139: pterocarpan synthase

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For detailed information about pterocarpan synthase, go to the full flat file.

Word Map on EC 4.2.1.139

4.2.1.139

pterocarpans

phytoalexins

dirigent

leguminous

elicitor

japonicus

soybean

lotus

isoflavonoid

sativa

medicago

stereochemistry

stereoisomer

lignan

domain-containing

alfalfa

Reaction

Synonyms

2',7-dihydroxy-4'-methoxyisoflavanol dehydratase, 7,2'-dihydroxy-4'-methoxyisoflavanol dehydratase, 7,2-dihydroxy-4-methoxyisoflavanol dehydratase, DMI dehydratase, DMID, EC 1.1.1.246, medicarpan synthase, medicarpin synthase

ECTree

4 Lyases

4.2 Carbon-oxygen lyases

4.2.1 Hydro-lyases

4.2.1.139 pterocarpan synthase

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Results	in table
2	AA Sequence
3	Expression
5	General Information
1	KM Value [mM]
3	Molecular Weight [Da]
2	Natural Substrates/ Products (Substrates)
5	Organism
6	Pathway
2	pH Optimum
2	Protein Variants
1	Purification (Commentary)
1	Reaction
4	Reference
4	Source Tissue
1	Specific Activity [micromol/min/mg]
4	Substrates and Products (Substrate)
9	Synonyms
1	Systematic Name
2	Temperature Optimum [°C]

Systematic Name

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Systematic Name on EC 4.2.1.139 - pterocarpan synthase

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(4R)-4,2'-dihydroxyisoflavan hydro-lyase (pterocarpan-forming)

The enzyme catalyses the formation of the additional ring in pterocarpan, the basic structure of phytoalexins produced by leguminous plants, including (-)-medicarpin, (+)-medicarpin, (-)-maackiain and (+)-maackiain. The enzyme requires that the hydroxyl group at C-4 of the substrate is in the (4R) configuration. The configuration of the hydrogen atom at C-3 determines whether the pterocarpan is the (+)- or (-)-enantiomer. The enzyme contains amino acid motifs characteristic of dirigent proteins.