Psychrobacter saeujeotis sp. nov., a novel halophilic bacterium isolated from salted shrimp jeotgal

A novel bacterial species, designated FBL11T, was isolated from salted shrimp jeotgal, a traditional Korean fermented food sampled in the Republic of Korea. This strain showed the highest 16S rRNA gene sequence similarity to Psychrobacter halodurans strain F2608T (NR_181578.1) at 98.3%. The genome size of strain FBL11T was 3,294,493 bp with a G+C content of 42.5 mol%. Computation of relatedness indicates that strain FBL11T shares the highest relatedness of 78.5% with Psychrobacter fulvigenes strain KC-40T (NZ_CAJGZP01) and 25.2% with Psychrobacter piechaudii strain CIP110854T (NZ_FUGE01), with values clearly below the cut-offs for species distinction. Polyphasic characterization using biochemical tests and matrix-assisted laser desorption/ionization time-of-flight MS analysis confirmed these findings. Strain FBL11T grew at 10-30 °C (optimum, 20-30 °C) with 0-15% NaCl (w/v; optimum, 3-6%). Analysis of biosynthetic gene clusters responsible for secondary metabolite production revealed that strain FBL11T generates unique products such as beta-lactone and redox-cofactors within this genus. Based on the genomic and phenotypic data obtained, we propose that strain FBL11T represents a novel species, for which we propose the name Psychrobacter saeujeotis sp. nov. (type strain FBL11T=KACC 23745T=KCTC 8655T=JCM 37231T).

Psychrobacter raelei sp. nov., isolated from a dog with peritonitis

A strain belonging to the genus Psychrobacter, named PraFG1T, was isolated from the peritoneal effusion of a stray dog during necropsy procedures. The strain was characterized by the phylogenetic analyses based on the nucleotide sequences of 16S and 23S rRNA genes and of gyrB, which placed the strain in the genus Psychrobacter. The nucleotide sequence of the chromosome confirmed the placement, showing an average nucleotide identity of 72.1, 77.7, and 77.5 % with the closest related species, namely Psychrobacter sanguinis, Psychrobacter piechaudii, and Psychrobacter phenylpyruvicus, respectively, thus indicating a novel species. The polyphasic characterization by biochemical and fatty acid profiling as well as MALDI-TOF supported those findings. The strain was halotolerant, capable of growing within a temperature range between 4 and 37 °C, it was positive for catalase and oxidase, indole producing, nitrate reducing, and not able to use 5-keto-d-gluconic acid as a carbon source. Taken together, the data suggest that strain PraFG1T could be considered as representing a novel species, with the name Psychrobacter raelei sp. nov. (type strain PraFG1T=CIP 111873T=LMG 32233T).