Evidence for the participation of a 5-oxo-prolinase in degradation of glutathione in nicotiana tabacum

Abstract

5-Oxo-prolinase, Glutathione, Tobacco, Tissue Culture. During degradation of glutathione in tobacco suspension cultures substancial amounts of 5-oxo-proline are formed in vivo as well as in crude cell homogenates in vitro. The existance of a 5-oxo-prolinase that catalyzes the conversion of 5-oxo-proline to glutamic acid was demonstrated in tobacco cells, grown with glutathione as sole sulfur source. © 1980, Walter de Gruyter. All rights reserved.