KACC - Korean Agricultural Culture Collection, Microbial Genetics Division, National Institute of Agricultural Biotechnology, Rural Development Administration, Suwon 441-707, Republic of Korea.
Published: February 2008
AI Article Synopsis
Article Abstract
A Gram-negative, aerobic bacterium, H1-M8(T), was isolated from seashore sand in Korea and then characterized using a polyphasic approach. Cells were short rods (0.7-1.0 x 1.5-2.0 microm) and were motile (each cell having at least one flagellum). Colonies were light-brown, non-pigmented, circular and convex with clear margins. Growth of the strain was observed at 5-35 degrees C, pH 6.0-9.0 and NaCl concentrations up to 8.4 % (w/v). Phylogenetic analysis of the 16S rRNA gene sequence revealed a clear affiliation between the novel strain and members of the genus Jannaschia. The sequence similarities between H1-M8(T) and type strains of the genus Jannaschia ranged from 97.0 to 97.8 %. However, DNA-DNA hybridizations between the isolate and type strains of other related species produced low values (21-38 %). The major isoprenoid quinone was Q-10 and the predominant cellular fatty acids were 18 : 1omega7c (68.2 %) and 18 : 0 (10.5 %). The G+C content of the DNA was 63.6 mol%. On the basis of physiological, biochemical and chemotaxonomic traits and data from the comparative 16S rRNA sequence analysis, strain H1-M8(T) represents a novel species of the genus Jannaschia, for which the name Jannaschia pohangensis sp. nov. is proposed. The type strain is H1-M8(T) (=KACC 11609(T) =DSM 19073(T)).
Division of Environmental Science and Ecological Engineering, College of Life Science and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
A Gram-stain-negative, non-motile, aerobic, pale-yellow coloured and oval-shaped bacterium designated GRR-S6-38 was isolated from a tidal flat sediment that collected from Garorim Bay of the Yellow Sea, Republic of Korea. Strain GRR-S6-38 grew at 15-40 °C (optimum, 30 °C) at pH 6-9 (optimum, pH 7) and at 2-6% (w/v) NaCl (optimum, 2% NaCl). Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain GRR-S6-38 was closely related to those of J.
The genus Jannaschia is one of the representatives of aerobic anoxygenic phototrophic (AAP) bacteria, which is a strictly aerobic bacterium, producing a photosynthetic pigment bacteriochlorophyll (BChl) a. However, a part of the genus Jannaschia members have not been confirmed the photosynthetic ability. The partly presence of the ability in the genus Jannaschia could suggest the complexity of evolutionary history for anoxygenic photosynthesis in the genus, which is expected as gene loss and/or horizontal gene transfer.
A bacterial strain, designated J12C1-MA-4, was isolated from liquid culture of the dinoflagellate Ceratoperidinium margalefii. The bacterium was Gram-negative, aerobic, and rod-shaped. Oxidase and catalase were positive.
Severe acute respiratory syndrome coronavirus 2 (SARS-Cov-2) is an infectious virus that causes coronavirus disease 2019 (COVID-19) transmitted mainly through droplets and aerosol affecting the respiratory tract and lungs. Little is known regarding why some individuals are more susceptible than others and develop severe symptoms. In this study, we analyzed the nasopharyngeal microbiota profile of aged patients with COVID-19 (asymptomatic vs.
Here, we report the draft genome sequences of putative aerobic anoxygenic phototrophic bacterial strains sp. strains AI_61 and AI_62, isolated from seawater around a coastal aquaculture in Ainan, Ehime, Japan. These genome sequences could be useful for our understanding of the variation of aerobic anoxygenic phototrophs in the genus.
