Production of extracellular vesicles with light-induced proton pump activity by proteorhodopsin-containing marine bacteria.

The production and release of extracellular vesicles (EVs) is a common process occurring in various types of bacteria. However, little is known regarding the functions of EVs derived from marine bacteria. We observed that during cell growth, Sediminicola sp.

Amylibacter kogurei sp. nov., a novel marine alphaproteobacterium isolated from the coastal sea surface microlayer of a marine inlet.

A novel Gram-negative bacterium, designated 4G11, was isolated from the sea surface microlayer of a marine inlet. On the basis of 16S rRNA gene sequence analysis, the strain showed the closest similarity to Amylibacter ulvae KCTC 32465 (99.0 %).

Algibacter aquaticus sp. nov., a slightly alkaliphilic marine Flavobacterium isolated from coastal surface water.

A rod-shaped, pale yellow-pigmented, aerobic, Gram-staining-negative strain with gliding motility, designated as strain SK-16T, was isolated from the coastal surface water of a semi-enclosed coastal inlet in Misaki, Japan. Analysis of 16S rRNA gene sequences revealed that SK-16T represented a member of the family Flavobacteriaceae and was closely related to the genus Algibacter, with sequence similarities ranging from 95.9 to 94.

Fabibacter misakiensis sp. nov., a marine bacterium isolated from coastal surface water.

A slightly curved-rod-shaped, pink-pigmented, Gram-stain-negative, aerobic bacterial strain with gliding motility, designated SK-8T, was isolated from coastal surface water of Misaki, Japan. Phylogenetic trees generated using 16S rRNA gene sequences revealed that strain SK-8T belonged to the genus Fabibacter and showed 96.0 % sequence similarity to the type strain of the most closely related species, Fabibacter pacificus DY53T.

Extracellular Vesicles of the Hyperthermophilic Archaeon "Thermococcus onnurineus" NA1T.

Extracellular vesicles (EVs) produced by a sulfur-reducing, hyperthermophilic archaeon, "Thermococcus onnurineus" NA1(T), were purified and characterized. A maximum of four EV bands, showing buoyant densities between 1.1899 and 1.

Nonlabens marinus [corrected] sp. nov., a novel member of the Flavobacteriaceae isolated from the Pacific Ocean.

Two aerobic, Gram-negative, orange pigmented and irregular rod-shaped bacteria, designated S1-05 and S1-08(T), were isolated from seawater from the Pacific Ocean. Phylogenetic analysis based on their 16S rRNA gene sequences revealed that the novel isolates could be affiliated with the genus Nonlabens of the family Flavobacteriaceae. The strains S1-05 and S1-08(T) shared 100 % pairwise sequences similarity with each other and showed less than 96.

Evidence for particle-induced horizontal gene transfer and serial transduction between bacteria.

Incubation of the amino acid-deficient strain Escherichia coli AB1157 with particles harvested from an oligotrophic environment revealed evidence of horizontal gene transfer (HGT) with restoration of all deficiencies in revertant cells with frequencies up to 1.94 × 10(-5). None of the markers were preferentially transferred, indicating that the DNA transfer is performed by generalized transduction.

Broad-Host Range Gene Transporter Particles Produced by Aliivibrio fischeri.

Aliivibrio fischeri NCIMB1281(T) (basonym, Vibrio fischeri) spontaneously started broad-host range vector particle (AfVP) production by budding from the logarithmic phase, and stabilised at around 7.0×10(10)-7.4×10(11) particles mL(-1) without any accompanying change in the host population.