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J. Biochem, 1978, Vol. 83, No. 3 893-903
© 1978 Japanese Biochemical Society


research-article

Purification and Characterization of Lysozyme Produced by Streptomyces erythraeus

Takashi MORITA, Saburo HARA and Yoshio MATSUSHIMA

Department of Chemistry, College of Science, Osaka University Toyonaka, Osaka 560

A species of lysozyme (SE lysozyme) was purified from culture filtrate of Streptomyces erythraeus. The enzyme has a molecular weight of 18,500 as determined by ultracentrifugation. Its isoelectric point is 9.5, and it shows optimal activity at pH 4.0 with an optimal ionic strength of 0.1. Investigation of the substrate specificity showed SE lysozyme to be an N-acetyl-muramidase. The simplest product in the digest of cell walls of Micrococcus lysodeikticus was identified as a disaccharide, [GlcNAcß(1{uparrow}4)MurNAc]. While S. aureus as well as M. lysodeikticus was lysed by this lysozyme, chitin and its derivatives were not.


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J. Biol. Chem.Home page
A. Rau, T. Hogg, R. Marquardt, and R. Hilgenfeld
A New Lysozyme Fold. CRYSTAL STRUCTURE OF THE MURAMIDASE FROM STREPTOMYCES COELICOLOR AT 1.65 A RESOLUTION
J. Biol. Chem., August 17, 2001; 276(34): 31994 - 31999.
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