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- W2124180162 abstract "2-Methyladenosine (methyl-Ado) has selective activity against Mycobacterium tuberculosis (M. tuberculosis). In an effort to better understand its mechanism of action, we have characterized its metabolism in M. tuberculosis cells. The primary intracellular metabolite of methyl-Ado was 2-methyl-adenylate (methyl-AMP). Very little of the methyl-AMP was metabolized further. A M. tuberculosis strain that was resistant to methyl-Ado did not express adenosine kinase and did not convert methyl-Ado to methyl-AMP in intact cells. In contrast to these results, the primary intracellular metabolite of adenosine in M. tuberculosis cells was ATP, which was readily incorporated into RNA. The rate of metabolism of methyl-Ado to methyl-AMP was similar to the rate of metabolism of adenosine to ATP. Treatment of M. tuberculosis with methyl-Ado did not affect intracellular ATP levels. Methyl-Ado and Ado were also cleaved to 2-methyladenine and adenine, respectively, which accumulated in the medium outside the cells. These studies suggested that methyl-AMP was the active metabolite responsible for the cytotoxicity of this agent. Furthermore, because methyl-Ado was poorly metabolized in human cells, these studies indicated that the selective activity of methyl-Ado was due to its selective activation by M. tuberculosis. These studies have identified two enzyme reactions (Ado kinase and Ado cleavage) in M. tuberculosis that could be exploited for the rational design of new and selective anti-M. tuberculosis agents." @default.
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- W2124180162 date "2004-01-01" @default.
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- W2124180162 title "Metabolism of 2-methyladenosine in Mycobacterium tuberculosis" @default.
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- W2124180162 doi "https://doi.org/10.1016/j.tube.2004.02.004" @default.
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