Methylation of phytohormones by the SABATH methyltransferases
- 95 Downloads
In plants, one of the most common modifications of secondary metabolites is methylation catalyzed by various methyltransferases. Recently, a new class of methyltransferases, the SABATH family of methyltransferases, was found to modify phytohormones and other small molecules. The SABATH methyltransferases share little sequence similarity with other well characterized methyltransferases. Arabidopsis has 24 members of the SABATH methyltransferase genes, and a subset of them has been shown to catalyze the formation of methyl esters with phytohormones and other small molecules. Physiological and genetic analyses show that methylation of phytohormones plays important roles in regulating various biological processes in plants, including stress responses, leaf development, and seed maturation/germination. In this review, we focus on phytohormone methylation by the SABATH family methyltransferases and the implication of these modifications in plant development.
Keywordsphytohormone SABATH family methyltransferase methylation AtJMT AtBSMT AtIAMT1 AtGAMT1 AtGAMT2 enzyme activity
Unable to display preview. Download preview PDF.
- 5.D’Auria J C, Chen F, Pichersky E. The SABATH family of MTs in Arabidopsis thaliana and other plant species. In: Romeo J T, ed. Recent Advances in Phytochemistry. Oxford: Elsevier Science, 2003, 37. 253–283Google Scholar
- 10.Murfitt L M, Kolosova N, Mann C J, et al. Purification and characterization of S-adenosyl-L-methionine: Benzoic acid carboxyl methyltransferase, the enzyme responsible for biosynthesis of the volatile eater methyl benzoate in flowers of Antirrhinum majus. Arch Biochem Biophys, 2000, 382: 145–151CrossRefGoogle Scholar
- 11.Kolosova N, Sherman D, Karlson D, et al. Cellular and subcellular localization of S-adenosyl-L-methionine: Benzoic acid carboxyl methyltransferase, the enzyme responsible for biosynthesis of the volatile ester methylbenzoate in snapdragon flowers. Plant Physiol, 2001, 126: 956–964CrossRefGoogle Scholar
- 29.Hamberg M, Gardner H W. Oxylipin pathway to jasmonates: Biochemistry and biological significance. Biochim Biophys Acta, 1992, 1165: 1–18Google Scholar
- 38.Karssen C M, Zagorski S, Kepczynski J, et al. Key role for endogenous gibberellins in the control of seed germination. Ann Bot, 1989, 63: 71–80Google Scholar
- 41.Davies P G. Plant Hormones: Physiology, Biochemistry, and Molecular Biology. Dordrecht, The Netherlands: Kluwer Academic Publishers, 1995Google Scholar