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Gene Review

CYP83B1  -  cytochrome P450 83B1

Arabidopsis thaliana

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High impact information on CYP83B1


Biological context of CYP83B1


Associations of CYP83B1 with chemical compounds

  • Another cytochrome P450 enzyme, CYP83B1, funnels IAOx into IGS [5].
  • Although expression of CYP83A1 under control of its endogenous promoter in the rnt1-1 background does not prevent the auxin excess and indole glucosinolate deficit phenotype caused by the lack of the CYP83B1 gene, ectopic overexpression of CYP83A1 using a 35S promoter rescues the rnt1-1 phenotype [3].
  • The presence of putative auxin responsive cis-acting elements in the CYP83B1 promoter but not in the CYP83A1 promoter supports the suggestion that CYP83B1 has evolved to selectively metabolize a tryptophan-derived aldoxime intermediate shared with the pathway of auxin biosynthesis in Arabidopsis [3].
  • The ability of CYP83A1 to metabolize aromatic oximes, albeit at small levels, explains the presence of indole glucosinolates at various levels in different developmental stages of the CYP83B1 knockout mutant, rnt1-1 [6].
  • Plants overexpressing CYP83B1 contain elevated levels of aliphatic glucosinolates derived from methionine homologs, whereas the level of indole glucosinolates is almost constant in the overexpressing lines [6].

Regulatory relationships of CYP83B1


Other interactions of CYP83B1


Analytical, diagnostic and therapeutic context of CYP83B1


  1. CYP83B1, a cytochrome P450 at the metabolic branch point in auxin and indole glucosinolate biosynthesis in Arabidopsis. Bak, S., Tax, F.E., Feldmann, K.A., Galbraith, D.W., Feyereisen, R. Plant Cell (2001) [Pubmed]
  2. RED1 is necessary for phytochrome B-mediated red light-specific signal transduction in Arabidopsis. Wagner, D., Hoecker, U., Quail, P.H. Plant Cell (1997) [Pubmed]
  3. The involvement of two p450 enzymes, CYP83B1 and CYP83A1, in auxin homeostasis and glucosinolate biosynthesis. Bak, S., Feyereisen, R. Plant Physiol. (2001) [Pubmed]
  4. The SUR2 gene of Arabidopsis thaliana encodes the cytochrome P450 CYP83B1, a modulator of auxin homeostasis. Barlier, I., Kowalczyk, M., Marchant, A., Ljung, K., Bhalerao, R., Bennett, M., Sandberg, G., Bellini, C. Proc. Natl. Acad. Sci. U.S.A. (2000) [Pubmed]
  5. DOF transcription factor AtDof1.1 (OBP2) is part of a regulatory network controlling glucosinolate biosynthesis in Arabidopsis. Skirycz, A., Reichelt, M., Burow, M., Birkemeyer, C., Rolcik, J., Kopka, J., Zanor, M.I., Gershenzon, J., Strnad, M., Szopa, J., Mueller-Roeber, B., Witt, I. Plant J. (2006) [Pubmed]
  6. CYP83A1 and CYP83B1, two nonredundant cytochrome P450 enzymes metabolizing oximes in the biosynthesis of glucosinolates in Arabidopsis. Naur, P., Petersen, B.L., Mikkelsen, M.D., Bak, S., Rasmussen, H., Olsen, C.E., Halkier, B.A. Plant Physiol. (2003) [Pubmed]
  7. Sur2 mutations of Arabidopsis thaliana define a new locus involved in the control of auxin homeostasis. Delarue, M., Prinsen, E., Onckelen, H.V., Caboche, M., Bellini, C. Plant J. (1998) [Pubmed]
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