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• W2031490085 abstract "Bacillus anthracis, which causes anthrax, has attracted attention because of its potential use as a biological weapon. The risk of multidrug resistance against B. anthracis increases the need for antibiotics with new molecular targets. Nucleoside analogs are well-known antiviral and anticancer prodrugs, and thymidine kinase catalyzes the rate-limiting step in the activation of pyrimidine nucleoside analogs used in chemotherapy. The thymidine kinase gene from B. anthracis Sterne strain (34F2) (Ba-TK) was cloned and expressed in E. coli, and the product was purified and characterized regarding its substrate specificity. Ba-TK phosphorylated pyrimidine nucleosides and all natural nucleoside triphosphates served as phosphate donors. Size exclusion chromatography indicated a dimeric form of Ba-TK, regardless of the presence of ATP. Thymidine was the most efficient substrate with a low Km value (0.6 μM) and a Vmax of 3.3 μmol dTMP mg-1 min-1, but deoxyuridine (Km=4.2 μM, Vmax=4.1 μmol dUMP mg-1 min-1) was also a good substrate. Several pyrimidine analogs were also tested and analogs with 5-position modifications showed higher activities compared to analogs with 3′- and N3-position modifications. Deoxyuridine analogs were the most potent inhibitors of B. anthracis growth in vitro. These results may be used to guide future development of nucleoside analogs against B. anthracis." @default.
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• W2031490085 date "2006-01-01" @default.
• W2031490085 modified "2023-09-23" @default.
• W2031490085 title "Evaluation of Bacillus anthracis thymidine kinase as a potential target for the development of antibacterial nucleoside analogs" @default.
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• W2031490085 doi "https://doi.org/10.1515/bc.2006.196" @default.
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