2001
DOI: 10.1073/pnas.081557298
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Jasmonic acid carboxyl methyltransferase: A key enzyme for jasmonate-regulated plant responses

Abstract: Methyl jasmonate is a plant volatile that acts as an important cellular regulator mediating diverse developmental processes and defense responses. We have cloned the novel gene JMT encoding an S-adenosyl-L-methionine:jasmonic acid carboxyl methyltransferase (JMT) from Arabidopsis thaliana. Recombinant JMT protein expressed in Escherichia coli catalyzed the formation of methyl jasmonate from jasmonic acid with K m value of 38.5 M. JMT RNA was not detected in young seedlings but was detected in rosettes, cauline… Show more

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Cited by 660 publications
(511 citation statements)
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“…SAMT and BAMT belong to a protein family called the SABATH [7]. In addition to SA and BA, other known carboxylic acid substrates of the SABATH family include jasmonic acid (JA) [34], indole-3-acetic acid [31,44e46], gibberellic acids [41], farnesoic acid [42], cinnamic acid and p-coumaric acid [16] and loganic acid [21]. Other members of the SABATH family are involved in caffeine biosynthesis by catalyzing nitrogen methylation [25].…”
Section: Introductionmentioning
confidence: 99%
“…SAMT and BAMT belong to a protein family called the SABATH [7]. In addition to SA and BA, other known carboxylic acid substrates of the SABATH family include jasmonic acid (JA) [34], indole-3-acetic acid [31,44e46], gibberellic acids [41], farnesoic acid [42], cinnamic acid and p-coumaric acid [16] and loganic acid [21]. Other members of the SABATH family are involved in caffeine biosynthesis by catalyzing nitrogen methylation [25].…”
Section: Introductionmentioning
confidence: 99%
“…Interestingly, a group of N-methyltransferases involved in biosynthesis of the alkaloid caffeine, including theobromine synthase, share sequence similarity with the SA and BA carboxyl methyltransferases . These enzymes were therefore grouped into a new class of methyltransferases designated the SABATH methyltransferases, and this family now also includes jasmonic acid methyltransferase (Seo et al, 2001), indole-acetic acid methyltransferase and cinnamic/p-coumaric acid methyltransferase (Kapteyn et al, 2007). The recently obtained three-dimensional structure of C. breweri SA carboxyl methyltransferase , combined with in silico modeling of the active site pocket in the Nicotiana suaveolens and S. floribunda enzymes (Pott et al, 2004), also indicates that these enzymes have a unique structure that is distinct from those of unrelated methyltransferases found in plants .…”
Section: Amino Acid-derived Flavor Compoundsmentioning
confidence: 99%
“…Enfin, la chaîne latérale est raccourcie par trois cycles de beta-oxydation pour conduire à l'AJ. L'AOPD, l'AJ, et son ester méthylique, le méthyle jasmonate (MJ), possèdent des propriétés de signalisation similaires pour certaines réponses physiologiques [18] mais clairement distinctes pour d'autres [19][20][21]. Les enzymes de biosynthèse conduisant de l'acide linolénique à l'AOPD (LOX, AOS, et AOC) sont chloroplastiques, les étapes ultérieures sont probablement catalysées dans les peroxysomes [22].…”
Section: Biosynthèse Des Oxylipinesunclassified
“…Des plantes chez lesquelles on a surexprimé ou au contraire inhibé des enzymes de biosynthèse d'oxylipines ont été obtenues et présentent une augmentation [20] ou une diminution de la résistance à différents agents pathogènes [29,30]. Les conséquences de la sur-ou sousexpression d'un gène de 9-Lox sur la résistance du tabac à Phythophthora ont été exposées par M.-T. Esquerré-Tuguayé au cours du colloque.…”
Section: Fonctions Des Oxylipines Dans La Défenseunclassified