Proteolytic Activation of a Galactosyl Transferase Involved in Osmotic Regulation

Osmotic regulation in the flagellate Ochromonas malhamensis Pringsheim is mainly mediated by changes in the pool size of α-galactosyl-(1 → 1)-glycerol (isofloridoside). Isofloridoside phosphate synthase, a regulated key enzyme responsible for the formation of isofloridoside phosphate, appears to exi...

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Bibliographic Details
Published in:Plant physiology (Bethesda) 1978-01, Vol.61 (1), p.35-37
Main Authors: Kauss, Heinrich, Klaus S. Thomson, Marta Tetour, Wolfgang Jeblick
Format: Article
Language:English
Subjects:
Biochemistry
Cell extracts
Centrifugation
Enzymes
Metabolism
Osmoregulation
Phosphates
Physiological regulation
Soybeans
Yeasts
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Summary:Osmotic regulation in the flagellate Ochromonas malhamensis Pringsheim is mainly mediated by changes in the pool size of α-galactosyl-(1 → 1)-glycerol (isofloridoside). Isofloridoside phosphate synthase, a regulated key enzyme responsible for the formation of isofloridoside phosphate, appears to exist as an inactive proenzyme which can be activated by incubation of crude cell extracts with endogenous or exogenous proteases.
ISSN:0032-0889
1532-2548
DOI:10.1104/pp.61.1.35