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Dynamics of serine/threonine protein kinase activity during the growth of the wild-typeStreptomyces avermitilis strain and its chloramphenicol-resistant mutant

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Abstract

The dynamics of serine/threonine protein kinase activity during the growth of the wild-typeStreptomyces avermitilis strain 964 and its chloramphenicol-resistant (Cmlr) pleiotropic mutant with an enhanced production of avermectins was studied by measuring the transfer of radiolabeled phosphate from [y-32P]ATP to the serine and threonine residues of proteins in cell-free extracts. In both of the strains studied, radiolabeled phosphate was found to incorporate into polypeptides with molecular masses of 32, 35, 41, 68, 75, 79, 83, and 137 kDa; however, the degree and the dynamics of phosphorylation of particular peptides were different in these strains. The differences revealed could not be accounted for by the interference of ATPases or phosphoprotein phosphatases. The data obtained may be interpreted as evidence that Cmlr mutation activates the protein kinase signalling system ofS.avermitilis cells in the early stationary growth phase and thus enhances the production of avermectins and leads to some other physiological changes in the mutant strain.

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Authors and Affiliations

  1. Russian Academy of Sciences, Bach Institute of Biochemistry, Leninskiipr. 33, 117071, Moscow, Russia

    S. M. Elizarov

  2. All-Russia Research Institute of Biosynthesis of Protein Substances, Moscow, Russia

    V. A. Mironov & V. N. Danilenko

Authors
  1. S. M. Elizarov
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  2. V. A. Mironov
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  3. V. N. Danilenko
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Elizarov, S.M., Mironov, V.A. & Danilenko, V.N. Dynamics of serine/threonine protein kinase activity during the growth of the wild-typeStreptomyces avermitilis strain and its chloramphenicol-resistant mutant. Microbiology 69, 281–286 (2000). https://doi.org/10.1007/BF02756734

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  • DOI: https://doi.org/10.1007/BF02756734

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