葡萄球菌中腺苷和胞苷甲基衍生物的分解代谢。

Microbios Pub Date : 1999-01-01
A Krasuski, M Marlewski
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引用次数: 0

摘要

对金黄色葡萄球菌和中间葡萄球菌静息细胞分解代谢1-甲基腺苷、2′- o -甲基腺苷、2′- o -甲基胞苷和5-甲基胞苷的产物进行了色谱分离。1-甲基腺苷中的甲基可以保护腺苷衍生物不受中间葡萄球菌的脱氨作用,但不能保护n -糖苷键不受中间葡萄球菌和金黄色葡萄球菌的裂解。2'- o -甲基腺苷和2'- o -甲基胞苷中的甲基可以保护n -糖苷键免受金黄色葡萄球菌和中间葡萄球菌的切割,但不能保护腺苷和胞苷衍生物免受中间葡萄球菌的脱氨作用。5-甲基胞苷转化的一般途径是先将5-甲基胞苷脱胺为核糖嘧啶,核糖嘧啶裂解生成胸腺嘧啶。S.中间体脱胺嘌呤和嘧啶核糖核苷腺苷,2'- o -甲基腺苷,胞苷和5-甲基胞苷。嘧啶核糖核苷(胞苷,5-甲基胞苷)仅被金黄色葡萄球菌缓慢地脱胺,而嘌呤核糖核苷(腺苷,2'- o -甲基腺苷)完全不被金黄色葡萄球菌脱胺。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Catabolism of the methyl derivatives of adenosine and cytidine in staphylococci.

Products of 1-methyladenosine, 2'-O-methyladenosine, 2'-O-methylcytidine, and 5-methylcytidine catabolism by resting cells of Staphylococcus aureus and Staphylococcus intermedius were chromatographically separated. The methyl group in 1-methyladenosine protected the adenosine derivative from deamination by S. intermedius but it did not protect N-glycosidic bond from cleavage by S. intermedius and S. aureus. The methyl group in 2'-O-methyladenosine and 2'-O-methylcytidine protected the N-glycosidic bond from cleavage by S. aureus and S. intermedius but it did not protect the adenosine and cytidine derivatives from deamination by S. intermedius. 5-Methylcytidine was converted by the common route in which 5-methylcytidine was first deaminated to ribothymidine which was cleaved to yield thymine. S. intermedius deaminated the purine and pyrimidine ribonucleosides adenosine, 2'-O-methyladenosine, cytidine, and 5-methylcytidine. Pyrimidine ribonucleosides (cytidine, 5-methyl-cytidine) were deaminated only slowly and purine ribonucleosides (adenosine, 2'-O-methyladenosine) not at all by S. aureus.

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