Information on EC 4.2.3.106 - (E)-beta-ocimene synthase

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The expected taxonomic range for this enzyme is: Magnoliophyta

EC NUMBER
COMMENTARY hide
4.2.3.106
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RECOMMENDED NAME
GeneOntology No.
(E)-beta-ocimene synthase
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REACTION
REACTION DIAGRAM
COMMENTARY hide
ORGANISM
UNIPROT
LITERATURE
geranyl diphosphate = (E)-beta-ocimene + diphosphate
show the reaction diagram
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PATHWAY
BRENDA Link
KEGG Link
MetaCyc Link
monoterpene biosynthesis
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SYSTEMATIC NAME
IUBMB Comments
geranyl-diphosphate diphosphate-lyase [(E)-beta-ocimene-forming]
Widely distributed in plants, which release beta-ocimene when attacked by herbivorous insects.
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
memeber of TPSg group of terpene synthases
UniProt
Manually annotated by BRENDA team
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UniProt
Manually annotated by BRENDA team
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UniProt
Manually annotated by BRENDA team
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UniProt
Manually annotated by BRENDA team
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UniProt
Manually annotated by BRENDA team
-
UniProt
Manually annotated by BRENDA team
-
UniProt
Manually annotated by BRENDA team
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
physiological function
enzyme is involved in the herbivore-induced indirect defense response of spider mite-infested Lotus japonicus via de novo formation and emission (E)-beta-ocimene
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
geranyl diphosphate
(E)-beta-ocimene + diphosphate
show the reaction diagram
additional information
?
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
Mg2+
presence of Mn2+ and Mg2+ required
Mn2+
presence of Mn2+ and Mg2+ required
pI VALUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
5.8
calculated
6.3
calculated
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
additional information
SUBUNITS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
POSTTRANSLATIONAL MODIFICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
proteolytic modification
sequence contains a plastid transit peptide
Cloned/COMMENTARY
ORGANISM
UNIPROT
LITERATURE
expression in Escherichia coli
expression in Nicotiana tabacum
EXPRESSION
ORGANISM
UNIPROT
LITERATURE
only slight variations in monoterpene synthase mRNA levels during the daily light/dark cycle
transcripts accumulate in leaves in response to exogenous jasmonic acid treatments, lepidopteran herbivory, and lepidopteran oral secretions
transcripts are upregulated in response to mechanical wounding and treatment with jasmonic acid, concurrent with induced emission of (E)-beta-ocimene
transcripts of LjEbOS are induced in plants infested with two-spotted spider mites, Tetranychus urticae, coinciding with increasing emissions of (E)-beta-ocimene as well as other volatiles, (Z)-3-hexenyl acetate and (E)-4,8-dimethyl-1,3,7-nonatriene, by the infested plants. Mechanical wounding of the leaves or application of alamethicin, a potent fungal elicitor of plant volatile emission, also induces transiently increased levels of transcripts, but not elevated release of (E)-beta-ocimene
treatment with the ethylene precursor, 1-aminocyclopropane-1-carboxylic acid does not cause an increase in transcripts
APPLICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
agriculture
when lima bean plants that have previously been placed downwind of transgenic tobacco plants that are constitutively overexpressing (E)-beta-ocimene synthase are infested by spider mites in an open-flow tunnel, they are more defensive to spider mites and more attractive to predatory mites, in comparison to the infested plants that have been placed downwind of wild-type tobacco plants. Similarly, when the transgenic tobacco-downwind maize plants are infested with Mythimna separata larvae, this results in reduced larval growth and greater attraction of parasitic wasps Cotesia kariyai. In a greenhouse experiment, lima bean plants placed near the transgenic tobacco plants are more attractive when damaged by spider mites, in comparison to the infested plants that have been placed near the wild-type plants. Volatile organic compounds emitted from infested receiver plants affect their conspecific neighboring plants to prime indirect defenses in response to herbivory