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

2,4,7-trihydroxy-1,4-benzoxazin-3-one-glucoside 7-O-methyltransferase (EC 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.[1] 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
2,4,7-trihydroxy-1,4-benzoxazin-3-one-glucoside 7-O-methyltransferase
Identifiers
EC no.2.1.1.241
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Search
PMCarticles
PubMedarticles
NCBIproteins

The enzyme is involved in the biosynthesis of the protective and allelopathic benzoxazinoid DIMBOA, e.g. from the family Poaceae (grasses).

References

  1. Jonczyk R, Schmidt H, Osterrieder A, Fiesselmann A, Schullehner K, Haslbeck M, Sicker D, Hofmann D, Yalpani N, Simmons C, Frey M, Gierl A (March 2008). "Elucidation of the final reactions of DIMBOA-glucoside biosynthesis in maize: characterization of Bx6 and Bx7". Plant Physiology. 146 (3): 1053–63. doi:10.1104/pp.107.111237. PMC 2259038. PMID 18192444.
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