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Methionine, glucosinolates

Methylthiobutyl glucosinolate derives from L-methionine by a complex elongation process leading to dihomomethionine. Four of the five carbons of methionine are retained, one being lost in a decarboxylation. The two necessary additional carbons each derive from a methyl group of acetyl-S-CoA by a complex, multi-step condensation mechanism (Equation 11) ... [Pg.688]

These reactions to 4-methylthiobutyl glucosinolate, the precursor for sulforaphane formation, have been extensively studied in Eruca sativa (arugula, rocket).64 A gene controlling variation in the glucosinolates of Arabidopsis is part of the methionine elongation pathway just described.65... [Pg.688]

Glucosinolates are derived from amino acids. The precursor amino acids comprise seven protein amino acids (alanine, valine, leucine, isoleucine, phenylalanine, tyrosine, and tryptophan), a number of chain-elongated methionines (CH3-S-(CH2)2-(CH2)n-CH(NH2)-COOH, n = 1-9), and chain-elongated... [Pg.226]

Kroymann, J., Textor, S., Tokuhisa, J.G., Falk K.L., Bartram, S., Gershenzon, J. and Mitchell-Olds, Z. (2001) A gene controlling variation in Arabidopsis glucosinolate composition is part of the methionine chain elongation pathway. Plant Phi/sioL, 127, 1077-88. [Pg.169]

Glucosinolates are divided into three classes based on the general chemical properties of the amino acid precursors. Aliphatic glucosinolates variously contain a straight carbon chain derived from methionine or a branched chain fix)m isoleucine, leucine or valine. Indole glucosinolates are formed from tryptophan, and the aromatic glucosinolates are derived from phenylalanine or tyrosine. ... [Pg.21]

GRASER, G., SCHNEIDER, B., OLDHAM, N.J., GERSHENZON, J., The methionine chain elongation pathway in the biosynthesis of glucosinolates in Eruca. saliva (Brassicaceae)., Xrc/i. Biochem. Biophys., 2000,378, 411-419. [Pg.35]

TEXTOR S., BARTRAM, S., KROYMANN, J., FALK, K.L., HICK, A., PICKETT, J.A., GERSHENZON, J., Biosynthesis of methionine-derived glucosinolates in Arabidopsis thaliana Recombinant expression and charaeterization of methylthioalkylmalate synthase, the condensing enzyme of the chain elongation cycle., Planta, 2003, in press. [Pg.36]

Figure 3.2 P450-mediated reactions involved in the formation of indole and methionine-derived glucosinolates in Arabidopsis. Enzymes catalyzing each step are indicated below the reaction arrows. Arabidopsis mutants blocked in the corresponding reaction are indicated above. Figure 3.2 P450-mediated reactions involved in the formation of indole and methionine-derived glucosinolates in Arabidopsis. Enzymes catalyzing each step are indicated below the reaction arrows. Arabidopsis mutants blocked in the corresponding reaction are indicated above.
A1 Oxidation of methionine-derived oximes Aliphatic glucosinolates [150]... [Pg.414]

L-Homo methionine a -Methylth io propyl-glucosinolate (Glucoi bervi ri n) a -Methylthiopropyl mustard oil CH -S-CH - CH - CH -... [Pg.290]

See other pages where Methionine, glucosinolates is mentioned: [Pg.276]    [Pg.276]    [Pg.182]    [Pg.79]    [Pg.176]    [Pg.177]    [Pg.46]    [Pg.79]    [Pg.229]    [Pg.233]    [Pg.233]    [Pg.233]    [Pg.241]    [Pg.11]    [Pg.174]    [Pg.632]    [Pg.75]    [Pg.182]    [Pg.182]    [Pg.458]    [Pg.129]    [Pg.132]    [Pg.135]    [Pg.252]    [Pg.182]    [Pg.23]    [Pg.24]    [Pg.25]    [Pg.26]    [Pg.26]    [Pg.27]    [Pg.29]    [Pg.29]    [Pg.31]    [Pg.31]    [Pg.31]    [Pg.33]    [Pg.51]   
See also in sourсe #XX -- [ Pg.131 ]



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Glucosinolates

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