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1 Microbiology Laboratory, Department of Biotechnology, North Bengal University, Siliguri-734430, West Bengal, India
2 Department of Microbiology, Bose Institute, CIT-Scheme VII-A, Kolkata-56, India
Correspondence
Ranadhir Chakraborty
rcnbu2003{at}yahoo.com
A Gram-negative, rod-shaped, urea-dissolving and non-spore-forming bacterium, designated strain NiVa 51T, was isolated from water of the River Torsa in Hasimara, Jalpaiguri district, West Bengal, India. On the basis of 16S rRNA gene sequence similarity, strain NiVa 51T was shown to belong to the
-Proteobacteria and to be related to Serratia marcescens subsp. sakuensis (98·35 %) and S. marcescens subsp. marcescens (98·30 %); however, strain NiVa 51T exhibited only 43·7 % similarity to S. marcescens by DNADNA hybridization. The G+C content of the genomic DNA of the isolate was 60 mol%. Both biochemical characteristics and fatty acid analysis data supported the affiliation of strain NiVa 51T to the genus Serratia. Furthermore, strain NiVa 51T was found to utilize urea as nitrogen source. The results of DNADNA hybridization as well as physiological and biochemical tests allowed genotypic and phenotypic differentiation of strain NiVa 51T from recognized Serratia species. Strain NiVa 51T therefore represents a novel species, for which the name Serratia ureilytica sp. nov. is proposed, with type strain NiVa 51T (=LMG 22860T=CCUG 50595T).
The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain NiVa 51T is AJ854062
Figures showing the growth curve of strain NiVA 51T and phylogenetic trees constructed by using maximum-parsimony, KITSCH and FITCH algorithms, and tables detailing the cellular fatty acid composition of strain NiVA 51T and related taxa, and similarity coefficients of members of the family Enterobacteriaceae are available as supplementary material in IJSEM Online.
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