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Comparative analysis of genes encoding methyl coenzyme M reductase in methanogenic bacteria



Comparative analysis of genes encoding methyl coenzyme M reductase in methanogenic bacteria



Molecular and General Genetics 213(2-3): 409-420



The sequence of the gene cluster encoding the methyl coenzyme M reductase (MCR) in Methanococcus voltae was determined. It contains five open reading frames (ORF), three of which encode the known enzyme subunits. Putative ribosome binding sites were found in front of all ORFs. They differ in their degrees of complementarity to the 3' end of the 16 S rRNA, which is discussed in terms of different translation efficiencies of the respective genes. The codon usage bias is different in the subunit encoding genes compared with the two other ORFs in the cluster and two other known genes of Mc. voltae. This is interpreted in terms of increased translational accuracy of the highly expressed MCR subunit genes. The derived polypeptide sequences encoded by the five ORFs of the MCR cluster were compared to those of the respective genes in Methanobacterium thermoautotrophicum Marburg and Methanosarcina barkeri. Conserved regions were detected in the enzyme subunits, which are candidates for factor binding domains. Conserved hydrophobic sequences found in the alpha and beta subunits are discussed with respect to the membrane association of the enzyme.

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Accession: 039614695

Download citation: RISBibTeXText

PMID: 3185509

DOI: 10.1007/bf00339610


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