2,4,7-trihydroxy-1,4-benzoxazin-3-one-glucoside 7-O-methyltransferase

Class of enzymes 2,4,7-trihydroxy-1,4-benzoxazin-3-one-glucoside 7-O-methyltransferase 2.1.1.241 2,4,7-trihydroxy-1,4-benzoxazin-3-one-glucoside 7-O-methyltransferase (2.1.1.241, BX7 (gene), OMT BX7) is an enzyme with systematic name S-adenosyl-L-methionine:(2R)-4,7-dihydroxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl β-D-glucopyranoside 7-O-methyltransferase. Jonczyk R, Schmidt H, Osterrieder A, Fiesselmann A, Schullehner K, Haslbeck M, Sicker D, Hofmann D, Yalpani N, Simmons C, Frey M, Gierl A Elucidation of the final reactions of DIMBOA-glucoside biosynthesis in maize: characterization of Bx6 and Bx7 Plant Physiology 146 3 1053–63 March 2008 18192444 2259038 10.1104/pp.107.111237 This enzyme catalyses the following chemical reaction S-adenosyl-L-methionine + (2R)-4,7-dihydroxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl β-D-glucopyranoside S-adenosyl-L-homocysteine + (2R)-4-hydroxy-7-methoxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl β-D-glucopyranoside The enzyme is involved in the biosynthesis of the protective and allelopathic glucoside of the benzoxazinoid, DIMBOA, e.g. from the family Poaceae (grasses). References External links 2,4,7-trihydroxy-1,4-benzoxazin-3-one-glucoside+7-O-methyltransferase Biology no Category:EC 2.1.1