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Tessaracoccus Antarcticus
''Tessaracoccus antarcticus'' is a Gram-positive and facultatively anaerobic bacterium from the genus ''Tessaracoccus'' which has been isolated from soil from the Fildes Peninsula. ''Tessaracoccus antarcticus'' produces rhodopsin Rhodopsin, also known as visual purple, is a protein encoded by the RHO gene and a G-protein-coupled receptor (GPCR). It is the opsin of the rod cells in the retina and a light-sensitive receptor protein that triggers visual phototransduct .... References Propionibacteriales Bacteria described in 2020 {{Propionibacterineae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gram-positive
In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bacteria take up the crystal violet stain used in the test, and then appear to be purple-coloured when seen through an optical microscope. This is because the thick peptidoglycan layer in the bacterial cell wall retains the stain after it is washed away from the rest of the sample, in the decolorization stage of the test. Conversely, gram-negative bacteria cannot retain the violet stain after the decolorization step; alcohol used in this stage degrades the outer membrane of gram-negative cells, making the cell wall more porous and incapable of retaining the crystal violet stain. Their peptidoglycan layer is much thinner and sandwiched between an inner cell membrane and a bacterial outer membrane, causing them to take up the counterstain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facultatively Anaerobic
A facultative anaerobic organism is an organism that makes ATP by aerobic respiration if oxygen is present, but is capable of switching to fermentation if oxygen is absent. Some examples of facultatively anaerobic bacteria are ''Staphylococcus'' spp., ''Escherichia coli'', ''Salmonella'', ''Listeria'' spp., '' Shewanella oneidensis'' and ''Yersinia pestis''. Certain eukaryotes are also facultative anaerobes, including fungi such as ''Saccharomyces cerevisiae'' and many aquatic invertebrates such as nereid polychaetes. See also * Aerobic respiration * Anaerobic respiration * Fermentation * Obligate aerobe * Obligate anaerobe * Microaerophile A microaerophile is a microorganism that requires environments containing lower levels of dioxygen than that are present in the atmosphere (i.e. < 21% O2; typically 2–10% O2) for optimal growth. A more re ... References External links [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tessaracoccus
''Tessaracoccus'' is a Gram-positive, non-spore-forming, facultatively anaerobic and non-motile bacterial genus from the family Propionibacteriaceae The Propionibacteriaceae are a family of Gram-positive bacteria In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad ca .... References Propionibacteriales Bacteria genera {{Propionibacterineae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fildes Peninsula
The Fildes Peninsula is a long peninsula that forms the south-western end of King George Island in the South Shetland Islands of Antarctica. It was named from association with nearby Fildes Strait by the UK Antarctic Place-Names Committee in 1960; the strait was likely named for Robert Fildes, a British sealer of the 1800s. Description The peninsula is the most extensively snow-free coastal area in summer on the island, most of which is permanently covered by ice. Its southeastern end is a point called Halfthree Point. It was charted and named by Discovery Investigations personnel on the '' Discovery II'' in 1935. It is part of the Fildes Peninsula Antarctic Specially Protected Area (ASPA 125), designated as such because of its paleontological values. It is separated at its tip from Nelson Island (South Shetland Islands), Nelson Island by Fildes Strait, only 370 m wide at its narrowest. It is bounded on its south-east coast by Maxwell Bay (Antarctica), Maxwell Bay, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodopsin
Rhodopsin, also known as visual purple, is a protein encoded by the RHO gene and a G-protein-coupled receptor (GPCR). It is the opsin of the rod cells in the retina and a light-sensitive receptor protein that triggers visual phototransduction in rods. Rhodopsin mediates dim light vision and thus is extremely sensitive to light. When rhodopsin is exposed to light, it immediately photobleaches. In humans, it is regenerated fully in about 30 minutes, after which the rods are more sensitive. Defects in the rhodopsin gene cause eye diseases such as retinitis pigmentosa and congenital stationary night blindness. Names Rhodopsin was discovered by Franz Christian Boll in 1876. The name rhodospsin derives from Ancient Greek () for "rose", due to its pinkish color, and () for "sight". It was coined in 1878 by the German physiologist Wilhelm Friedrich Kühne (1837-1900). When George Wald discovered that rhodopsin is a holoprotein, consisting of retinal and an apoprotein, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propionibacteriales
The ''Propionibacteriales'' are an order of bacteria. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature List of Prokaryotic names with Standing in Nomenclature (LPSN) is an online database that maintains information on the naming and taxonomy Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical ... (LPSN). The phylogeny is based on whole-genome analysis. References Actinomycetota {{actinobacteria-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
