6533b82dfe1ef96bd1291f7d

RESEARCH PRODUCT

Characterization of a novel selenium methyltransferase from freshwater bacteria showing strong similarities with the calicheamicin methyltransferase

Sylvie NazaretLionel RanjardSabine Adelaide Eugenie Favre-bonteBenoit CournoyerClaire MonnezClaire Prigent-combaret

subject

[SDE] Environmental SciencesMethyltransferaseStereochemistry[SDV]Life Sciences [q-bio]Molecular Sequence DataBiophysicschemistry.chemical_elementBiochemistryGas Chromatography-Mass Spectrometry03 medical and health sciencesStructural BiologyPhylogeneticsGeneticsAmino Acid SequencePeptide sequencePhylogenyComputingMilieux_MISCELLANEOUS030304 developmental biologyDNA Primerschemistry.chemical_classification0303 health sciencesbiologyPhylogenetic treeBacteriaBase SequenceSequence Homology Amino Acid030306 microbiologyMethylationMethyltransferasesbiology.organism_classificationAmino acid[SDV] Life Sciences [q-bio]Biochemistrychemistry[SDE]Environmental SciencesWater MicrobiologyBacteriaSelenium

description

A novel group of Se-methyltransferases is presented. The genetic determinant, named mmtA, which revealed this group was isolated from selenite and selenate-resistant freshwater bacteria. E. coli expressing mmtA and grown with a Se supplement emitted dimethyl selenide (DMSe) and dimethyl diselenide (DMDSe). Phylogenetic analysis divided MmtA-like bacterial sequences into two clusters, one grouping MmtA with S- and O-methyltransferases, and one grouping UbiE C-methyltransferases. Se methylation by some of these MmtA phyletic neighbours was investigated.

10.1016/j.bbaexp.2004.05.001https://hal-univ-lyon1.archives-ouvertes.fr/hal-02569679