Methylation of inorganic and organic selenium by the bacterial thiopurine methyltransferase.

J Bacteriol

UMR CNRS 5557-Ecologie Microbienne (Center for Microbial Ecology), Université Claude Bernard-Lyon I, 69622 Villeurbanne Cedex, France.

Published: June 2002

Escherichia coli cells expressing the tpm gene encoding the bacterial thiopurine methyltransferase (bTPMT) are shown to methylate selenite and (methyl)selenocysteine into dimethylselenide (DMSe) and dimethyldiselenide (DMDSe). E. coli cells expressing tpm from a gene library cosmid clone (harboring a Pseudomonas syringae insert of about 20 kb) also methylated selenate into DMSe and DMDSe. bTPMT is the first methyltransferase shown to be involved in the methylation of these selenium derivatives.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC135077PMC
http://dx.doi.org/10.1128/JB.184.11.3146-3149.2002DOI Listing

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