%0 Journal Article %A González, José M. %A Covert, Joseph S. %A Whitman, William B. %A Henriksen, James R. %A Mayer, Frank %A Scharf, Birgit %A Schmitt, Rüdiger %A Buchan, Alison %A Fuhrman, Jed A. %A Kiene, Ronald P. %A Moran, Mary Ann %T Silicibacter pomeroyi sp. nov. and Roseovarius nubinhibens sp. nov., dimethylsulfoniopropionate-demethylating bacteria from marine environments %D 2003 %J International Journal of Systematic and Evolutionary Microbiology, %V 53 %N 5 %P 1261-1269 %@ 1466-5034 %R https://doi.org/10.1099/ijs.0.02491-0 %K MeSH, methanethiol %K DMS, dimethylsulfide %K ITS, internal transcribed spacer %K DMSP, dimethylsulfoniopropionate; %K PHB, poly-β-hydroxybutyrate %I Microbiology Society, %X Three Gram-negative, rod-shaped, aerobic bacteria that were capable of degrading dimethylsulfoniopropionate (DMSP) were isolated from marine waters. These isolates (DSS-3T, DSS-10 and ISMT) exhibited the ability to demethylate and cleave DMSP, as well as to degrade other sulfur compounds related to DMSP that are cycled in marine environments. Intracellular poly-β-hydroxybutyrate inclusions, surface blebs and one polar, complex flagellum that rotated exclusively in the clockwise direction were observed for DSS-3T. The outer membrane of ISMT was separated from the cytoplasm at the poles in a toga-like morphology. The primary fatty acid in both strains was C18 : 1 ω7c. DNA G+C contents for the isolates were 68·0±0·1, 68·1±0·1 and 66·0±0·2 mol% for DSS-3T, DSS-10 and ISMT, respectively. 16S rRNA gene sequence analyses placed these organisms within the Roseobacter lineage of the α-Proteobacteria. Closely related species were Silicibacter lacuscaerulensis and Ruegeria atlantica (DSS-3T and DSS-10) and Roseovarius tolerans (ISMT). Neither DSS-3T nor ISMT exhibited 16S rRNA similarity >97 % or DNA–DNA hybridization values >45 % to their nearest described relatives. Genotypic and phenotypic analyses support the creation of two novel species: Silicibacter pomeroyi sp. nov. with strain DSS-3T (=ATCC 700808T=DSM 15171T) as the type strain, and Roseovarius nubinhibens sp. nov. with strain ISMT (=ATCC BAA-591T=DSM 15170T) as the type strain. %U https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.02491-0