Pseudoalteromonas is a genus of marine bacteria. In 1995, Gauthier et al proposed Pseudoalteromonas as a new genus to be split from Alteromonas. The Pseudoalteromonas species that were described before 1995 were originally part of the genus Alteromonas, and were reassigned to Pseudoalteromonas based on their rRNA-DNA analysis.
Alteromonas is a genus of Pseudomonadota found in sea water, either in the open ocean or in the coast. It is Gram-negative. Its cells are curved rods with a single polar flagellum.
Pseudoalteromonas piscicida is a marine bacterium. It is known to produce a quorum sensing molecule called 2-heptyl-4-quinolone (HHQ), which functions as a bacterial infochemical. Research into the effects of this infochemical on phytoplankton is currently being conducted by Dr. Kristen Whalen of Haverford College.
Shewanella is the sole genus included in the marine bacteria family Shewanellaceae. Some species within it were formerly classed as Alteromonas. Shewanella consists of facultatively anaerobic Gram-negative rods, most of which are found in extreme aquatic habitats where the temperature is very low and the pressure is very high. Shewanella bacteria are a normal component of the surface flora of fish and are implicated in fish spoilage. Shewanella chilikensis, a species of the genus Shewanella commonly found in the marine sponges of Saint Martin's Island of the Bay of Bengal, Bangladesh.
Cytophaga is a genus of Gram-negative, gliding, rod-shaped bacteria. This bacterium is commonly found in soil, rapidly digests crystalline cellulose C. hutchinsonii is able to use its gliding motility to move quickly over surfaces. Although the mechanism for this is not known, there is a belief that the flagellum is not used
Lambda-carrageenase is an enzyme which breaks down a polysaccharide found in red seaweeds, lambda-carrageenan. This enzyme has only been found in marine bacteria.
Algicola is a genus in the phylum Pseudomonadota (Bacteria).
Halomonas titanicae is a gram-negative, halophilic species of bacteria which was isolated in 2010 from rusticles recovered from the wreck of the RMS Titanic. It has been estimated by Henrietta Mann, one of the researchers that first isolated it, that the action of microbes like Halomonas titanicae may bring about the total deterioration of the Titanic by 2030. While the bacteria have been identified as a potential danger to oil rigs and other man-made objects in the deep sea, they also have the potential to be used in bioremediation to accelerate the decomposition of shipwrecks littering the ocean floor.
Pseudoalteromonas aurantia is an antibacterial-producing marine bacterium commonly found in Mediterranean waters. In 1979, Gauthier and Breittmayer first named it Alteromonas aurantia to include it in the genus Alteromonas that was described seven years earlier, in 1972 by Baumann et al. In 1995, Gauthier et al renamed Alteromonas aurantia to Pseudoalteromonas aurantia to include it in their proposed new genus, Pseudoalteromonas, which they recommended splitting from Alteromonas.
Pseudoalteromonas citrea is a yellow-pigmented marine bacterium that is antibiotic-producing and was isolated from Mediterranean waters off Nice. Originally named Alteromonas citrea, nearly two decades later it was reclassified as part of the Genus Pseudoalteromonas.
Pseudoalteromonas elyakovii is a marine bacterium.
Pseudoalteromonas espejiana is a marine bacterium.
Pseudoalteromonas luteoviolacea is a marine bacterium which was isolated from seawater near Nice.
Pseudoalteromonas tetraodonis is a marine bacterium isolated from the surface slime of the puffer fish. It secretes the neurotoxin, tetrodotoxin. It was originally described in 1990 as Alteromonas tetraodonis but was reclassified in 2001 to the genus Pseudoalteromonas.
Pseudoalteromonas undina is a marine bacterium isolated from seawater off the coast of Northern California. It was originally classified as Alteromonas undina but was reclassified in 1995 to the genus Pseudoalteromonas.
Alteromonas macleodii is a species of widespread marine bacterium found in surface waters across temperate and tropical regions. First discovered in a survey of aerobic bacteria in 1972, A. macleodii has since been placed within the phylum Pseudomonadota and is recognised as a prominent component of surface waters between 0 and 50 metres. Alteromonas macleodii has a single circular DNA chromosome of 4.6 million base pairs. Variable regions in the genome of A. macleodii confer functional diversity to closely related strains and facilitate different lifestyles and strategies. Certain A. macleodii strains are currently being explored for their industrial uses, including in cosmetics, bioethanol production and rare earth mining.
Acetobacter aceti, a Gram-negative bacterium that moves using its peritrichous flagella, was discovered when Louis Pasteur proved it to be the cause of conversion of ethanol to acetic acid in 1864. Today, A.aceti is recognized as a species within the genus Acetobacter, belonging to the family Acetobacteraceae in the class Alphaproteobacteria. Its bacterial motility plays an important role in the formation of biofilms, intricate communities where A. aceti cells aggregate and collaborate, further enhancing their ability to metabolize ethanol and produce acetic acid. Widely distributed in various environmental niches, this benign microorganism thrives in habitats abundant in fermentable sugars, such as flowers, fruits, honey, water, and soil, present wherever sugar fermentation occurs. A. aceti grows best within temperatures ranging from 25 to 30 degrees Celsius, with an upper limit of 35 degrees Celsius, and in slightly acidic conditions with a pH between 5.5 to 6.3. A. aceti has long been used in the fermentation industry efficiently producing acetic acid from alcohol as an obligate aerobe dependent on oxygen as the terminal electron acceptor. A. aceti, classified as an acidophile, able to survive in acidic environments, possesses an acidified cytoplasm, providing most proteins with acid stability. The microorganism's ability to thrive in environments rich in fermentable sugars shows its potential as an organism for studying microbial metabolism and adaptation.
Acidithiobacillus caldus formerly belonged to the genus Thiobacillus prior to 2000, when it was reclassified along with a number of other bacterial species into one of three new genera that better categorize sulfur-oxidizing acidophiles. As a member of the Gammaproteobacteria class of Pseudomonadota, A. caldus may be identified as a Gram-negative bacterium that is frequently found in pairs. Considered to be one of the most common microbes involved in biomining, it is capable of oxidizing reduced inorganic sulfur compounds (RISCs) that form during the breakdown of sulfide minerals. The meaning of the prefix acidi- in the name Acidithiobacillus comes from the Latin word acidus, signifying that members of this genus love a sour, acidic environment. Thio is derived from the Greek word thios and describes the use of sulfur as an energy source, and bacillus describes the shape of these microorganisms, which are small rods. The species name, caldus, is derived from the Latin word for warm or hot, denoting this species' love of a warm environment.
Dokdonia donghaensis is a strictly aerobic, gram-negative, phototrophic bacterium that thrives in marine environments. The organism can grow at a broad range of temperatures on seawater media. It has the ability to form biofilms, which increases the organism's resistance to antimicrobial agents, such as tetracycline.
Halorubrum kocurii is a halophilic archaean belonging to the genus Halorubrum. This genus contains a total of thirty-seven different species, all of which thrive in high-salinity environments. Archaea belonging to this genus are typically found in hypersaline environments due to their halophilic nature, specifically in solar salterns. Halorubrum kocurii is a rod-shaped, Gram-negative archaeon. Different from its closest relatives, Halorubrum kocurii is non-motile and contains no flagella or cilia. This archaeon thrives at high pH levels, high salt concentrations, and moderate temperatures. It has a number of close relatives, including Halorubrum aidingense, Halorubrum lacusprofundi, and more.
