Aug 2026· Current Microbiology· Vol 83· 0 citations· 30 references
Medicine
TL;DR
Based on phenotypic, chemotaxonomic, genomic, and phylogenetic data, strain PT13T represents a novel species of the genus Psychromonas, for which the name Psychromonas saccharinae sp.
Genome analysis identified genetic features potentially associated with stress adaptation and iron/tryptophan metabolism, providing additional ecological context for this plant-associated isolate.
Xue Li, Yu Tao, Ming Li et al.· Archives of Microbiology· 0 citations
A Gram-stain-negative, strictly aerobic, yellow-pigmented, non-motile, rod-shaped rod-shaped bacterium, designated J2K-J805T, was isolated from coastal seawater of Jeju Island, Republic of Korea. Strain J2K-J805T grew at 15–37°C (optimum, 30°C), pH 6.0–8.0 (optimum, pH 7.0–7.5) and in the presence of 1–4% (w/v) NaCl (optimum, 2–3%) and was catalase-positive and oxidase-negative. The strain showed the highest 16S rRNA gene sequence similarity to Hyunsoonleella flava T58T (98.4%). Phylogenetic and phylogenomic analyses based on the 16S rRNA gene and whole-genome sequences placed strain J2K-J805T within the genus Hyunsoonleella as a distinct lineage. The OrthoANIu and digital DNA-DNA hybridization values between strain J2K-J805T and H. flava T58T were 87.7 and 34.5%, respectively, both below their respective thresholds for species delineation. The genome size and DNA G+C content were 3,825,400 bp and 34.9 mol%, respectively. The predominant respiratory quinone was MK-6, and the major cellular fatty acids were iso-C15:1 G, iso-C15:0 and iso-C17:0 3-OH. The polar lipid profile comprised phosphatidylethanolamine, three unidentified aminolipids, two unidentified glycolipids and five unidentified lipids. High-performance liquid chromatography with photodiode-array detection identified the major yellow pigment as zeaxanthin, and the genome contained the carotenoid biosynthesis genes crtB, crtI, crtY and crtZ together with genes for isoprenoid precursor supply. On the basis of these polyphasic data, strain J2K-J805T represents a novel species, for which the name Hyunsoonleella zeaxanthinifaciens sp. nov. is proposed. The type strain is J2K-J805T (= KCTC 102498T = JCM 38469T).
Juyeong An, Jong Woo Hyeon, M. Taj et al.· Journal of Microbiology and...· 0 citations
A Gram-stain-negative, rod-shaped, aerobic strain CY06T was isolated from surface marine sediment sample of the Yellow Sea, China. The strain was positive for oxidase and catalase and could reduce nitrate to nitrite but not further to gaseous nitrogen products. Phylogenetic analysis based on 16S rRNA gene sequences and the up-to-date bacterial core gene (UBCG) sequences revealed that strain CY06T formed a distinct clade within the genus Parasedimentitalea. Genomic comparisons, including digital DNA-DNA hybridization (dDDH), average nucleotide identity (ANI) and average amino acid identity (AAI), clearly distinguished strain CY06T from other members of the genus. The morphological, physiological, biochemical and chemotaxonomic data further supported its differentiation from closely related species. Based on the polyphasic evidence, a new species, Parasedimentitalea nitratireducens sp. nov., is proposed, with the type strain CY06T (=MCCC 1K08636T = KCTC 72006T).