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@ARTICLE{Jonczyk:62913,
      author       = {Jonczyk, R. and Schmidt, H. and Osterrieder, A. and
                      Fiesselmann, A. and Schullehner, K. and Haslbeck, M. and
                      Sicker, D. and Hofmann, D. and Yalpani, N. and Simmons, C.
                      and Frey, M. and Gierl, A.},
      title        = {{E}lucidation of the {F}inal {R}eactions of
                      {DIMBOA}-{G}lucoside {B}iosysnthesis in {M}aize:
                      {C}haracterization of {B}x6 and {B}x71[{W}][{OA}]},
      journal      = {Plant physiology},
      volume       = {146},
      issn         = {0032-0889},
      address      = {Rockville, Md.: Soc.},
      publisher    = {JSTOR},
      reportid     = {PreJuSER-62913},
      pages        = {1053 - 1063},
      year         = {2008},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Benzoxazinoids were identified in the early 1960s as
                      secondary metabolites of the grasses that function as
                      natural pesticides and exhibit allelopathic properties.
                      Benzoxazinoids are synthesized in seedlings and stored as
                      glucosides (glcs); the main aglucone moieties are
                      2,4-dihydroxy-2H-1,4-benzoxazin-3(4H)-one (DIBOA) and
                      2,4-dihydroxy-7-methoxy-2H-1,4-benzoxazin-3(4H)-one
                      (DIMBOA). The genes of DIBOA-glc biosynthesis have
                      previously been isolated and the enzymatic functions
                      characterized. Here, the enzymes for conversion of DIBOA-glc
                      to DIMBOA-glc are identified. DIBOA-glc is the substrate of
                      the dioxygenase BENZOXAZINLESS6 (BX6) and the produced
                      2,4,7-trihydroxy-2H-1,4-benzoxazin-3-(4H)-one-glc is
                      metabolized by the methyltransferase BX7 to yield
                      DIMBOA-glc. Both enzymes exhibit moderate K(m) values (below
                      0.4 mm) and k(cat) values of 2.10 s(-1) and 0.25 s(-1),
                      respectively. Although BX6 uses a glucosylated substrate,
                      our localization studies indicate a cytoplasmic localization
                      of the dioxygenase. Bx6 and Bx7 are highest expressed in
                      seedling tissue, a feature shared with the other Bx genes.
                      At present, Bx6 and Bx7 have no close relatives among the
                      members of their respective gene families. Bx6 and Bx7 map
                      to the cluster of Bx genes on the short arm of chromosome
                      4.},
      keywords     = {Benzoxazines: metabolism / Chromosomes, Plant / Cytoplasm:
                      enzymology / Genes, Plant / Glucosides: biosynthesis /
                      Glucosides: metabolism / Molecular Sequence Data / Multigene
                      Family / Phylogeny / Protein O-Methyltransferase: genetics /
                      Protein O-Methyltransferase: metabolism / Seedling:
                      enzymology / Zea mays: enzymology / Zea mays: genetics /
                      2,4-dihydroxy-1,4-benzoxazin-3-one (NLM Chemicals) /
                      2-O-glucopyranosyl-4-hydroxy-7-methoxy-1,4-benzoxazin-3-one
                      (NLM Chemicals) / Benzoxazines (NLM Chemicals) / Glucosides
                      (NLM Chemicals) /
                      2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (NLM Chemicals)
                      / Protein O-Methyltransferase (NLM Chemicals) / J (WoSType)},
      cin          = {ZCH},
      ddc          = {580},
      cid          = {I:(DE-Juel1)ZCH-20090406},
      pnm          = {Terrestrische Umwelt},
      pid          = {G:(DE-Juel1)FUEK407},
      shelfmark    = {Plant Sciences},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:18192444},
      pmc          = {pmc:PMC2259038},
      UT           = {WOS:000256412200031},
      doi          = {10.1104/pp.107.111237},
      url          = {https://juser.fz-juelich.de/record/62913},
}