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Methanol production by Mycobacterium smegmatis.
1Department of Biochemistry, University of California, Berkeley 94720.
Journal of Bacteriology
|March 1, 1988
Summary
Mycobacterium smegmatis produces [3H]methanol from [methyl-3H]methionine, primarily via S-adenosylmethionine. This methanol originates from protein demethylation and an unknown high-mobility component, not folate pathways.
Area of Science:
- Microbiology
- Biochemistry
Background:
- Mycobacterium smegmatis is a model organism for studying mycobacterial metabolism.
- Understanding methyl group metabolism is crucial for various biological processes.
Purpose of the Study:
- To investigate the metabolic origin and fate of methanol produced by Mycobacterium smegmatis.
- To identify the specific pathways and precursors involved in methanol biosynthesis in this bacterium.
Main Methods:
- Incubation of Mycobacterium smegmatis cells with radiolabeled [methyl-3H]methionine.
- Analysis of radiolabeled methanol production and its precursors using biochemical assays.
- Investigation of potential methanol incorporation into cellular components, including polysaccharides and lipids.
Main Results:
- Mycobacterium smegmatis produces [3H]methanol when incubated with [methyl-3H]methionine.
- The methanol is derived from S-adenosylmethionine, not methyltetrahydrofolate.
- Methanol likely results from the demethylation of carboxymethylated proteins and an unidentified high-gel-mobility component.
- Methanol was not incorporated into the methylated mannose polysaccharide or lipid carriers.
Conclusions:
- S-adenosylmethionine is the primary methyl donor for methanol production in M. smegmatis.
- Protein demethylation contributes to methanol formation, alongside an unidentified source.
- M. smegmatis does not incorporate exogenous methanol into its methylated mannose polysaccharide or lipid carriers.