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Institute of Cell and Molecular Biology, University of Edinburgh, Mayfield Road, Edinburgh EH9 3JR, UK
Author for correspondence: Graeme A. Reid. Tel: +44 131 650 5352. Fax: +44 131 650 8650. e-mail: Graeme.Reid{at}ed.ac.uk
ABSTRACT
Dissimilatory Fe(III) reduction by Shewanella putrefaciens and related species has generated considerable interest in biochemical characterization of the pathways for anaerobic electron transfer in this organism. Two strains, MR-1 and NCIMB 400, have been extensively used, and several respiratory enzymes have been isolated from each. It has become apparent that significant sequence differences exist between homologous proteins from these strains. The 16S rRNA from NCIMB 400 was sequenced and compared to the sequences from MR-1 and other Shewanella strains. The results indicate that NCIMB 400 is significantly more closely related to the newly identified Shewanella frigidimarina than to the S. putrefaciens type strain. It is therefore proposed that NCIMB 400 should be reclassified as S. frigidimarina.
Key Words: Shewanella • 16S rRNA • cytochromes • anaerobic respiration
The EMBL accession number for the 16S rRNA gene sequence of strain NCIMB 400 reported in this paper is Y13699.
Present Address: Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK.
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