Proteolytic processing of dextransucrase of Leuconostoc mesenteroides |
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Authors: | Sánchez-González M Alagón A Rodríguez-Sotrés R López-Munguía A |
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Institution: | Instituto de Biotecnología, Universidad Nacional Autónoma de México, Apdo Postal 510-3, Cuernavaca, Morelos, Mexico. |
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Abstract: | Various dextransucrase molecular mass forms found in enzyme preparations may sometimes be products of proteolytic activity. Extracellular protease in Leuconostoc mesenteroides strains NRRL B-512F and B-512FMC dextransucrase preparations was identified. Protease had a molecular mass of 30 kDa and was the predominant form derived from a high molecular mass precursor. The production and activity of protease in culture medium was strongly dependent on pH. When L. mesenteroides dextransucrase (173 kDa) was hydrolyzed by protease, at pH 7 and 37 degrees C, various dextransucrase forms with molecular masses as low as 120 kDa conserving dextransucrase activity were obtained. |
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Keywords: | Strain typing Enterococcus RAPD-PCR Plasmid profile Pulsed-field gel electrophoresis |
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