''Polynucleobacter meluiroseus'' is an
aerobic, chemo-
organotrophic
An organotroph is an organism that obtains hydrogen or electrons from organic substrates. This term is used in microbiology to classify and describe organisms based on how they obtain electrons for their respiration processes. Some organotrophs su ...
, non-motile, free-living
bacterium
Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among ...
of the genus ''
Polynucleobacter
''Polynucleobacter'' is a genus of bacteria, originally established by Heckmann and Schmidt (1987) to exclusively harbor obligate endosymbionts of ciliates belonging to the genus '' Euplotes''.
Recently, several new ''Polynucleobacter'' species ...
''.
The type strain was isolated from the mountain lake (1,710 meters)
Lac de Melu
Lac de Melu is a lake in Corsica, France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the A ...
located in the
Restonica Valley on the Mediterranean island
Corsica
Corsica ( , Upper , Southern ; it, Corsica; ; french: Corse ; lij, Còrsega; sc, Còssiga) is an island in the Mediterranean Sea and one of the 18 regions of France. It is the fourth-largest island in the Mediterranean and lies southeast of ...
,
France
France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
near to the commune of
Corte. The type strain of ''P. meluiroseus'' is remarkable because of its unusual pigmentation compared to other ''Polynucleobacter'' strains, as well as due to the presence of a
Proteorhodopsin
Proteorhodopsin (also known as pRhodopsin) is a family of transmembrane proteins that use retinal as a chromophore for light-mediated functionality, in this case, a proton pump. pRhodopsin is found in marine planktonic bacteria, archaea and e ...
gene in the genome of the strain. Furthermore, the
16S rRNA 16S rRNA may refer to:
* 16S ribosomal RNA
16 S ribosomal RNA (or 16 S rRNA) is the RNA component of the 30S subunit of a prokaryotic ribosome ( SSU rRNA). It binds to the Shine-Dalgarno sequence and provides most of the SSU structure.
The g ...
gene of the type strain contains an unusual
indel
Indel is a molecular biology term for an insertion or deletion of bases in the genome of an organism. It is classified among small genetic variations, measuring from 1 to 10 000 base pairs in length, including insertion and deletion events that ...
previously only known from uncultured ''Polynucleobacter'' strains detected by cultivation-independent methods in mountain lakes located in the
Pyrenees
The Pyrenees (; es, Pirineos ; french: Pyrénées ; ca, Pirineu ; eu, Pirinioak ; oc, Pirenèus ; an, Pirineus) is a mountain range straddling the border of France and Spain. It extends nearly from its union with the Cantabrian Mountains to C ...
.
The type strain dwells as a free-living, planktonic bacterium in the water column of the lake, thus is part of freshwater
bacterioplankton
Bacterioplankton refers to the bacterial component of the plankton that drifts in the water column. The name comes from the Ancient Greek word ' ('), meaning "wanderer" or "drifter", and ', a Latin term coined in the 19th century by Christian G ...
. The complete genome sequence of the type strain was determined.
[NCBI Genome (https://www.ncbi.nlm.nih.gov/genome/?term=txid1938814)]
References
External links
IMG - Integrated Microbial Genomes''
{{DEFAULTSORT:Polynucleobacter meluiroseus
Burkholderiaceae
Bacteria described in 2018