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Expression of the plant sulphite reductase in cell suspension cultures fromCatharanthus roseusL.

✍ Scribed by Jens D. Schwenn; Annette Kemena

Publisher
Springer-Verlag
Year
1984
Tongue
English
Weight
804 KB
Volume
160
Category
Article
ISSN
0032-0935

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✦ Synopsis

Sulphur-heterotrophic growth exhibited a dual response to the expression of sulphate-assimilating enzymes. The level of ATP-sulphurylase (EC 2.7.7.4) appeared "repressed" while sulphite reductase (EC 1.8.7.1) and O-acetyl-L-serine sulphhydrylase (EC 4.2.99.8) were "derepressed" and coordinated in their occurrence. The capability of the cells to reduce adenylylphosphosulphate or 3'phospho adenylylphosphosulphate to cysteine coincided with the activity of sulphite reductase. The expression of these reducing steps lacked correlation with the regulation of ATP-sulphurylase.

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Dissimilation of methionine in cell susp
Dissimilation of methionine in cell suspension cultures fromCatharanthus roseusL.
✍ Jens D. Schwenn; Ulrich Schriek; Hans H. Kiltz πŸ“‚ Article πŸ“… 1983 πŸ› Springer-Verlag 🌐 English βš– 1003 KB

Plant cell suspension cultures from Catharanthus roseus were investigated for their capability to dissimilate methionine or its analogs in order to reutilize the sulphane group for cysteine biosynthesis. Three steps have been described as prerequisites of this process: (a) oxidative degradation by t