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Biochemistry (Moscow)

, Volume 73, Issue 3, pp 310–314 | Cite as

Extracellular yeast-lytic enzyme of the bacterium Lysobacter sp. XL 1

  • O. A. StepnayaEmail author
  • I. M. Tsfasman
  • I. A. Chaika
  • T. A. Muranova
  • I. S. Kulaev
Article

Abstract

An enzyme exhibiting yeast-lytic activity has been isolated from the culture liquid of the bacterium Lysobacter sp. XL. 1. The optimal conditions for the hydrolysis of Saccharomyces cerevisiae cells by the enzyme have been established: 0.15 M sodium acetate buffer, pH 6.0, 50°C. The yeast-lytic activity of the enzyme is inhibited by EDTA, p-chloromercuribenzoate, and phenylmethylsulfonyl fluoride. According to the data of SDS-PAGE, the molecular weight of the protein is 36 kD. The enzyme hydrolyzes casein, hemoglobin, and synthetic peptide Abz-Ala-Ala-Phe-pNA, i.e. it exhibits proteolytic activity. The properties of the enzyme and its molecular weight correspond to those of a previously isolated extracellular metalloproteinase. The N-terminal amino acid sequence of the protein exhibits 67% homology with the N-terminal sequence of achromolysine of Achromobacter lyticus (EC 3.4.24.-).

Key words

metalloproteinase lysoamidase Lysobacter sp yeast-lytic enzymes 

Abbreviations

Abz

o-aminobenzoate

pNA

p-nitroaniline

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Copyright information

© Pleiades Publishing, Ltd. 2008

Authors and Affiliations

  • O. A. Stepnaya
    • 1
    Email author
  • I. M. Tsfasman
    • 1
  • I. A. Chaika
    • 1
  • T. A. Muranova
    • 2
  • I. S. Kulaev
    • 1
  1. 1.Skryabin Institute of Biochemistry and Physiology of MicroorganismsRussian Academy of SciencesPushchino, Moscow RegionRussia
  2. 2.Branch of Shemyakin and Ovchinnikov Institute of Bioorganic ChemistryRussian Academy of SciencesPushchino, Moscow RegionRussia

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