This enzyme is a class I terpene synthase . 9beta-Pimara-7,15-diene is a precursor of momilactones A and B, rice diterpenoid phytoalexins that are produced in response to attack (by a pathogen, elicitor or UV irradiation) and are involved in the defense mechanism of the plant. Momilactone B can also act as an allochemical, being constitutively produced in the root of the plant and secreted to the rhizosphere where it suppresses the growth of neighbouring plants and soil microorganisms .
This enzyme is a class I terpene synthase [1]. 9beta-Pimara-7,15-diene is a precursor of momilactones A and B, rice diterpenoid phytoalexins that are produced in response to attack (by a pathogen, elicitor or UV irradiation) and are involved in the defense mechanism of the plant. Momilactone B can also act as an allochemical, being constitutively produced in the root of the plant and secreted to the rhizosphere where it suppresses the growth of neighbouring plants and soil microorganisms [1].
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CRYSTALLIZATION/commentary
ORGANISM
UNIPROT
LITERATURE
homology model of the second active site of enzyme based on the structure of 5-epiaristolochene synthase from Nicotiana tabacum, Protein Data Bank ID code 5EAT
swapping of residues 568–640 of isopimaradiene synhase to corresponding residues 560-632 of levopimaradiene/abietadiene synthase results in complete reversion of the product profiles of the two enzymes
Biosynthesis of cyclic diterpene hydrocarbons in rice cell suspensions: conversion of 9,10-syn-labda-8(17),13-dienyl diphosphate to 9beta-pimara-7,15-diene and stemar-13-ene
Wilderman, P.R.; Xu, M.; Jin, Y.; Coates, R.M.; Peters, R.J.
Identification of syn-pimara-7,15-diene synthase reveals functional clustering of terpene synthases involved in rice phytoalexin/allelochemical biosynthesis
Okada, K.; Kawaide, H.; Miyamoto, K.; Miyazaki, S.; Kainuma, R.; Kimura, H.; Fujiwara, K.; Natsume, M.; Nojiri, H.; Nakajima, M.; Yamane, H.; Hatano, Y.; Nozaki, H.; Hayashi, K.
HpDTC1, a stress-inducible bifunctional diterpene cyclase involved in momilactone biosynthesis, functions in chemical defence in the moss Hypnum plumaeforme
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4.2.3.35 syn-pimara-7,15-diene synthase
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