''Tessaracoccus antarcticus'' is a

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. The Gram stain is ...

and

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' ...

bacterium from the genus ''

Tessaracoccus ''Tessaracoccus'' is a Gram-positive, non-spore-forming, facultatively anaerobic and non-motile bacterial genus from the family Propionibacteriaceae. Phylogeny The currently accepted taxonomy is based on the List of Prokaryotic names with Stand ...

'' which has been isolated from soil from the

Fildes Peninsula The Fildes Peninsula is a long peninsula that forms the south-western end of King George Island (South Shetland Islands), King George Island in the South Shetland Islands of Antarctica. It was named from association with nearby Fildes Strait b ...

. ''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 a light-sensitive receptor protein that triggers visual phototransduction in rod cells. Rhodopsin mediates dim ...

References

Propionibacteriales Bacteria described in 2020 {{Propionibacterineae-stub