Zymographic characterization of bacteriolytic enzymes produced by oral streptococci |
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Authors: | Yoshimura Goh Komatsuzawa Hitoshi Kajimura Junko Fujiwara Tamaki Ohara Masaru Kozai Katsuyuki Sugai Motoyuki |
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Institution: | Department of Bacteriology, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima, Japan. |
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Abstract: | Zymographic analysis was performed to know the bacteriolytic enzyme profiles of 4% SDS extracts of oral streptococci, Streptococcus mutans, S. sobrinus, S. sanguis, S. mitis and S. salivarius. We investigated the five strains in each species and found that the profile was very similar among strains of the same species except for S. salivarius(the profile was classified into two types). On the other hand, the profile was considerably different among species. Two major bacteriolytic enzymes of S. mutans showing molecular mass of 80 and 100 kDa were found using SDS-boiled S. mutans or S. sobrinus cells as substrate. These bacteriolytic activities were less apparent in the gel containing S. mitis or S. salivarius, and also not detectable in the gel containing S. sanguis. S. sobrinus extract showed only one bacteriolytic band (78 kDa) as strong activity using S. sobrinus cells as substrate. S. sanguis extract showed no bacteriolytic bands using any streptococcal cells. Extracts of either S. mitis or S. salivarius showed weak activity by using respective strains as substrate. |
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Keywords: | zymography oral streptococci bacteriolytic enzyme |
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