Proteolytic Activation of a Galactosyl Transferase Involved in Osmotic Regulation | Zendy

H. Kauss | Zendy; Kenneth S. Thomson | Zendy; Martha Tetour | Zendy; Wolfgang Jeblick | Zendy

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Proteolytic Activation of a Galactosyl Transferase Involved in Osmotic Regulation

Author(s) -

H. Kauss,

Kenneth S. Thomson,

Martha Tetour,

Wolfgang Jeblick

Publication year - 1978

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.61.1.35

Subject(s) - flagellate , proteases , biochemistry , incubation , enzyme , transferase , phosphate , endogeny , osmotic shock , biology , chemistry , botany , gene

Osmotic regulation in the flagellate Ochromonas malhamensis Pringsheim is mainly mediated by changes in the pool size of alpha-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.

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