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Protoplast formation and localization of enzymes in Streptococcus mitis.

机译:微生物链球菌中原生质体的形成和酶的定位。

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Cells of Streptococcus mitis ATCC 903 were converted to stable protoplasts by the cell wall-degrading M-1 enzyme of the mutanolysin complex isolated from Streptomyces globisporus. Over 90% of total glucokinase (EC 2.7.1.2), aminopeptidase (EC 3.4.11.1), and dextranglucosidase (EC 3.2.1.70) was recovered in the cytoplasmic fraction, whereas over 20% of total invertase (beta-fructofuranosidase: EC 3.2.1.26) was released during protoplast formation. ATPase (EC 3.6.1.3). chymotrypsin-like protease (EC 3.4.21.1), arginine aminopeptidase (EC 3.4.11.6), and lactate dehydrogenase (EC 1.1.1.27) were detected in Triton X-100 extracts of the cytoplasmic membrane fraction by crossed immunoelectrophoresis in combination with enzyme-staining procedures. By these methods, NADH dehydrogenase (EC 1.6.99.3), aminopeptidase, and lactate dehydrogenase were detected in the cytoplasmic fraction. Aminopeptidases in the cytoplasmic fraction differed from this activity in the membrane fractions in electrophoretic mobility and substrate specificity.
机译:通过从球形双链霉菌中分离的变溶菌素复合物的细胞壁降解性M-1酶,将链球菌ATCC 903细胞转化为稳定的原生质体。超过90%的总葡萄糖激酶(EC 2.7.1.2),氨基肽酶(EC 3.4.11.1)和右旋糖苷酶(EC 3.2.1.70)回收到细胞质部分,而总转化酶(β-果糖呋喃糖苷酶:EC 3.2)超过20% 1.26)在原生质体形成过程中释放。 ATPase(EC 3.6.1.3)。通过交叉免疫电泳结合酶-酶法在细胞质膜部分的Triton X-100提取物中检测到胰凝乳蛋白酶样蛋白酶(EC 3.4.21.1),精氨酸氨基肽酶(EC 3.4.11.6)和乳酸脱氢酶(EC 1.1.1.27)。染色程序。通过这些方法,在细胞质级分中检测到NADH脱氢酶(EC 1.6.99.3),氨肽酶和乳酸脱氢酶。细胞质级分中的氨基肽酶在电泳迁移率和底物特异性方面与膜级分中的这种活性不同。

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