Genus Enhydrobacter Staley et al. 1987 should be recognized as a member of the family Rhodospirillaceae within the class Alphaproteobacteria
Article first published online: 13 FEB 2012
© 2012 The Societies and Blackwell Publishing Asia Pty Ltd
Microbiology and Immunology
Volume 56, Issue 1, pages 21–26, January 2012
How to Cite
Kawamura, Y., Fujiwara, N., Naka, T., Mitani, A., Kubota, H., Tomida, J., Morita, Y. and Hitomi, J. (2012), Genus Enhydrobacter Staley et al. 1987 should be recognized as a member of the family Rhodospirillaceae within the class Alphaproteobacteria. Microbiology and Immunology, 56: 21–26. doi: 10.1111/j.1348-0421.2011.00401.x
- Issue published online: 13 FEB 2012
- Article first published online: 13 FEB 2012
- Accepted manuscript online: 7 DEC 2011 04:35AM EST
- Received 15 July 2011; accepted 19 October 2011.
- class Alphaproteobacteria;
- family Rhodospirillaceae;
- genus Enhydrobacter;
- Moraxella osloensis
The genus Enhydrobacter, first reported as a member of the family Vibrionaceae, has been placed in the family Moraxellaceae, but as a genus incertae sedis in Bergey's Manual of Systematic Bacteriology 2nd edition. During our taxonomic investigation of Enhydrobacter-like organisms, we observed that the 16S rRNA sequences of E. aerosaccus-type strain versions NCIMB 12535T, ATCC 27094 T and CCUG 58314T were very different from the accessible data (accession no. AJ550856). Phylogenetic analysis of our 16S rRNA sequence data revealed that these organisms were located within the family Rhodospirillaceae. The genera Inquilinus, Oceanibaculum, Skermanella and Nisaea were closely related (sequence similarities were 88.3∼87.0%), but Enhydrobacter could be distinguished from these genera by growth characteristics, fatty acid profiles (C19:0 cyclo ω8c; 38.4% C18:1ω7c; 32.2%, and C16:0; 8.9% were major components), in being non-flagellated, and differing in enzymatic activities, including trypsin and β-glucosidase. From these data, we conclude that the genus Enhydrobacter should be recognized as an independent genus of the family Rhodospirillaceae within the class Alphaproteobacteria.