RT Journal Article SR Electronic(1) A1 Ivanova, Elena P A1 Sawabe, Tomoo A1 Alexeeva, Yuliya V A1 Lysenko, Anatolii M A1 Gorshkova, Nataliya M A1 Hayashi, Karin A1 Zukova, Natalia V A1 Christen, Richard A1 Mikhailov, Valery VYR 2002 T1 Pseudoalteromonas issachenkonii sp. nov., a bacterium that degrades the thallus of the brown alga Fucus evanescens. JF International Journal of Systematic and Evolutionary Microbiology, VO 52 IS 1 SP 229 OP 234 DO https://doi.org/10.1099/00207713-52-1-229 PB Microbiology Society, SN 1466-5034, AB Eleven non-pigmented strains of gram-negative, aerobic, marine bacteria with polar flagella were isolated from the thallus of the brown alga Fucus evanescens collected in the Kraternaya Bight of the Kurile Islands in the Pacific Ocean. These organisms were conspecific and exhibited high levels of genetic relatedness (up to 91%). The G+C contents of the DNAs of these strains were 42.9-43.3 mol%. These halophilic bacteria had bacteriolytic, proteolytic and haemolytic activities and degraded algal polysaccharides, synthesizing a number of glycoside hydrolases (fucoidanases, laminaranases, alginases, agarases, pullulanases, beta-glucosidases, beta-galactosidases, beta-N-acetylglucosaminidases and beta-xylosidases). By 16S rDNA analysis, the bacteria were shown to belong to the genus Pseudoalteromonas, a member of the gamma-subclass of the Proteobacteria. DNA from the strains isolated from the brown alga showed 27-54% genetic relatedness with respect to DNAs of other type strains of the genus Pseudoalteromonas. The phenotypic characteristics, together with the genetic evidence, indicate that this group of epiphytic bacteria represents a distinct species, Pseudoalteromonas issachenkonii sp. nov., for which the type strain is KMM 3549T (= LMG 19697T = CIP 106858T)., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-52-1-229