Abstract
Conditions have been established for the optimization of the specific activity of a membrane-bound monoterpene hydroxylase from cell suspension cultures of Catharanthus roseus. In time course studies, the hydroxylase and NADPH-cytochrome c reductase exhibited maximal activities 18–20 days after inoculation, i.e., during early stationary phase. By late stationary phase, enzyme activity had declined. In contrast an enzyme of primary metabolism achieved optimal specific activity by the 12th day and remained constant through day 26, synchronous with general growth. Effects of nutritional and hormonal factors on the specific activity of the hydroxylase and cell growth were evaluated. Inhibitors of hydroxylase activity were also assessed in vitro. A soluble form of the monoterpene hydroxylase has been detected in cultured cells possibly affording a useful source of this enzyme for further purification.
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Spitsberg, V., Coscia, C.J. & Krueger, R.J. Characterization of a monoterpene hydroxylase from cell suspension cultures of Catharanthus roseus (L.) G. Don. Plant Cell Reports 1, 43–47 (1981). https://doi.org/10.1007/BF00269268
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DOI: https://doi.org/10.1007/BF00269268