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Purification and Assay of Extracellular Autolysin from Moraxella sp. CK-l  

오영상 (한양대학교 화학과)
이장현 (평택대학교 교양학부)
한명수 (한양대학교 생명과학과)
윤문영 (한양대학교 화학과)
Publication Information
Korean Journal of Microbiology / v.39, no.3, 2003 , pp. 148-154 More about this Journal
Abstract
Moraxella sp. CK-l is known to inhibits the growth of Anabaena cylindrica, a cyanobacterium. It has been documented that the ability of this growth inhibition of Anabaena cylindrica was attributed to extracellular autolysin from Moraxella sp. CK-l. However, it remains to be elucidated identification and characterization of autolysin have yet been elucidated. In this study, we tried to purify and identify autolysin secreted from Moraxella sp. CK-l. Cells were grown in a complex liquid medium (BGC-11) and culture supernatants were collected, followed by ammonium sulfate fractionation. Fractions were further separated with anion exchange column, Mono-Q, in FPLC system and analyzed by SDS/PAGE. The fraction containing high autolysin activity showed a single distinct protein peak in anion column and molecular mass of about 17 kDa in SDS/PAGE. Nterminal amino acid sequencing of the protein was analyzed, of which result showed the homology with some proteases, including extracellular serine protease, Dichelobacter nodosus.
Keywords
Anabaena cylindrica; Extracellular autolysin; Moraxella sp. CK-1;
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