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Results 1 - 5 of 5
EC Number
Substrates
Commentary Substrates
Organism
Products
Commentary (Products)
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the only substance that serves as a substrate for the recombinant Bx7 is TRIBOA-Glc, neither the aglucone TRIBOA nor well-known substrates of plant O-methyltransferases are efficiently converted by the enzyme. In case of quercetin, a minor activity is detected. BX7 has no catalytic activity toward phenylpropanoids and flavonoids, e.g. apigenin is no substrate
?
-
?
S-adenosyl-L-methionine + (2R)-4,7-dihydroxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl beta-D-glucopyranoside
-
S-adenosyl-L-homocysteine + (2R)-4-hydroxy-7-methoxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl beta-D-glucopyranoside
-
?
S-adenosyl-L-methionine + 2-(2,4,7-trihydroxy-8-methoxy-1,4-benzoxazin-3-one)-beta-D-glucopyranose
i.e. TRIMBOA-Glc
S-adenosyl-L-homocysteine + 2-(2,4-dihydroxy-7,8-dimethoxy-1,4-benzoxazin-3-one)-beta-D-glucopyranose
-
?
S-adenosyl-L-methionine + 2-(2,4,7-trihydroxy-8-methoxy-1,4-benzoxazin-3-one)-beta-D-glucopyranose
i.e. TRIMBOA-Glc, enzyme BX7 methylates the C-7 hydroxyl group of TRIBOA-Glc. Recombinant BX7 also accepts TRIMBOA-Glc as substrate and methylates the hydroxyl group at C-7
S-adenosyl-L-homocysteine + 2-(2,4-dihydroxy-7,8-dimethoxy-1,4-benzoxazin-3-one)-beta-D-glucopyranose
-
?
S-adenosyl-L-methionine + (2R)-4,7-dihydroxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl beta-D-glucopyranoside
conversion of (2R)-2,4,7-trihydroxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl beta-D-glucopyranoside, TRIBOA-Glc, to DIMBOA-Glc
S-adenosyl-L-homocysteine + (2R)-4-hydroxy-7-methoxy-3-oxo-3,4-dihydro-2H-1,4-benzoxazin-2-yl beta-D-glucopyranoside
i.e. DIMBOA-Glc
?
Results 1 - 5 of 5