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Molecular and Biochemical Characterization of a Cytokinin Oxidase from Maize
Open accessAbstract
It is generally accepted that cytokinin oxidases, which oxidatively remove cytokinin side chains to produce adenine and the corresponding isopentenyl aldehyde, play a major role in regulating cytokinin levels in planta. Partially purified fractions of cytokinin oxidase from various species have been studied for many years, but have yet to clearly reveal the properties of the enzyme or to define its biological significance. Details of the genomic organization of the recently isolated maize (Zea mays) cytokinin oxidase gene (ckx1) and some of its Arabidopsis homologs are now presented. Expression of an intronless ckx1 inPichia pastoris allowed production of large amounts of recombinant cytokinin oxidase and facilitated detailed kinetic and cofactor analysis and comparison with the native enzyme. The enzyme is a flavoprotein containing covalently bound flavin adenine dinucleotide, but no detectable heavy metals. Expression of the oxidase in maize tissues is described.
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Citations
Cited by
Werner, T., Motyka, V., Laucou, V., Smets, R., Van Onckelen, H., & Schmülling, T. (2003) · The Plant Cell · doi:10.1105/tpc.014928 · Cited by 1,527
C YTOKININ M ETABOLISM AND A CTION
Mok, D. W., & Mok, M. C. (2001) · Annual Review of Plant Physiology and Plant Molecular Biology · doi:10.1146/annurev.arplant.52.1.89 · Cited by 1,292
Regulation of plant growth by cytokinin
Werner, T., Motyka, V., Strnad, M., & Schmülling, T. (2001) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.171304098 · Cited by 1,133
Phytoremediation and rhizoremediation of organic soil contaminants: Potential and challenges
Gerhardt, K. E., Huang, X.-D., Glick, B. R., & Greenberg, B. M. (2009) · Plant Science · doi:10.1016/j.plantsci.2008.09.014 · Cited by 959
Comprehensive Comparison of Auxin-Regulated and Brassinosteroid-Regulated Genes in Arabidopsis
Goda, H., Sawa, S., Asami, T., Fujioka, S., Shimada, Y., & Yoshida, S. (2004) · Plant Physiology · doi:10.1104/pp.103.034736 · Cited by 499
Metadata
- Authors
- Bilyeu, K. D., Cole, J. L., Laskey, J. G., Riekhof, W. R., Esparza, T. J., Kramer, M. D., & Morris, R. O.
- Venue
- Plant Physiology
- Publisher
- Oxford University Press (OUP)
- Published
- 2001-01-01
- Volume
- 125
- Issue
- 1
- Pages
- 378-386
- ISSN
- 0032-0889 (ISSN-L)
- 1532-2548
- OpenAlex
- W2120742274
- Cited by
- 215
- References
- 0
- FWCI
- 15.01
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Bilyeu, K. D., Cole, J. L., Laskey, J. G., Riekhof, W. R., Esparza, T. J., Kramer, M. D., & Morris, R. O. (2001). Molecular and Biochemical Characterization of a Cytokinin Oxidase from Maize. Plant Physiology. https://doi.org/10.1104/pp.125.1.378
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