RT Journal Article SR Electronic(1) A1 Romanenko, Lyudmila A. A1 Zhukova, Natalia V. A1 Rohde, Manfred A1 Lysenko, Anatoly M. A1 Mikhailov, Valery V. A1 Stackebrandt, ErkoYR 2003 T1 Pseudoalteromonas agarivorans sp. nov., a novel marine agarolytic bacterium JF International Journal of Systematic and Evolutionary Microbiology, VO 53 IS 1 SP 125 OP 131 DO https://doi.org/10.1099/ijs.0.02234-0 PB Microbiology Society, SN 1466-5034, AB The phenotypic, genomic and phylogenetic characteristics of four aerobic, Gram-negative, non-fermentative, motile, non-pigmented, agarolytic Pseudoalteromonas-like bacteria, isolated from marine environments, have been investigated. These bacteria share DNA–DNA similarities above 86 %. Comparative 16S rDNA sequence analysis of strain KMM 255T revealed its membership of the genus Pseudoalteromonas; it shares 99·9 % sequence similarity with Pseudoalteromonas distincta, Pseudoalteromonas elyakovii, Pseudoalteromonas atlantica and Pseudoalteromonas espejiana. DNA–DNA reassociation levels obtained for strain KMM 255T and type strains of these four species and other Pseudoalteromonas species were below 45 %. The marine isolates differed from known species of the genus by the fact that the cells are motile by means of a single flagellum or two to four polar unsheathed flagella and by an inability to utilize most organic compounds. On the basis of phenotypic, DNA–DNA hybridization and phylogenetic data, it is concluded that the isolates represent a novel species within the genus Pseudoalteromonas, for which the name Pseudoalteromonas agarivorans sp. nov. is proposed. The type strain is strain KMM 255T (=DSM 14585T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.02234-0