''Desulfitobacterium hafniense'' is a species of gram positive bacteria, its type strain is DCB-2
T.
( NCBI taxonomy ID 272564; DSM 10664).
''D. hafniense'' are anaerobic
spore-forming bacteria. The majority of the described isolates are facultatively organohalide respiring bacteria capable of reductive
dechlorination
In organochlorine chemistry, reductive dechlorination describes any chemical reaction which cleaves the covalent bond between carbon and chlorine via reductants, to release chloride ions. Many modalities have been implemented, depending on the a ...
of
organohalides such as
chlorophenols, and
tetrachloroethene
Tetrachloroethylene, also known under the systematic name tetrachloroethene, or perchloroethylene, and many other names (and abbreviations such as "perc" or "PERC", and "PCE"), is a chlorocarbon with the formula Cl2C=CCl2 . It is a colorless li ...
. The cells of ''D. hafniense'' are rod-shaped and 3.3 to 6
μm long by 0.6 to 0.7 μm wide, they are
motile
Motility is the ability of an organism to move independently, using metabolic energy.
Definitions
Motility, the ability of an organism to move independently, using metabolic energy, can be contrasted with sessility, the state of organisms th ...
, each cell having one or two terminal
flagella. All tested strains are resistant to the antibiotic
vancomycin
Vancomycin is a glycopeptide antibiotic medication used to treat a number of bacterial infections. It is recommended intravenously as a treatment for complicated skin infections, bloodstream infections, endocarditis, bone and joint infections, ...
.
Over the years several additional strains belonging to the ''hafniense'' species has been described from a diverse range of environments. Strains PCP-1, TCE1, DP7, TCP-A and G2 were originally published as members of a separate species ''Frappieri,'' but all are today considered as belonging to the ''hafniense'' species.
Genomes
The genome of D. hafniense contains the machinery for both
pyrrolysine and
selenocysteine, making it the only known organism that potentially utilizes 22 amino acids in protein translation.
[ Herring, S.; Ambrogelly, A.; Polycarpo, C. R.; Soll, D. Recognition of Pyrrolysine TRNA by the Desulfitobacterium Hafniense Pyrrolysyl-TRNA Synthetase. Nucleic Acids Research 2007, 35 (4), 1270–1278. https://doi.org/10.1093/nar/gkl1151.
]
''Desulfitobacterium hafniense'' strain DCB-2
T has a single circular genome that contains 5.78 Mbp encoding 5,045 genes. The genome of ''Desulfitobacterium hafniense'' strain DCB-2
T harbors seven genes encoding reductive dehalogenases, five of these seems to be functional and two are disrupted by mutations.
Full genome sequence information is available for nine ''desulfitobacterium hafniense'' strains. They all have genome sizes ranging from 5 to 5,7 Mbp, none of the sequenced strains contains any plasmids. The genomes encodes only limited numbers of
reductive dehalogenases, in addition to genes for utilizing a wide range of electron donors and acceptors.
References
Further reading
*
*
*
*
*
External links
LPSN*
Type strain of ''Desulfitobacterium hafniense'' at Bac''Dive'' - the Bacterial Diversity Metadatabase
Peptococcaceae
Bacteria described in 1996
{{Clostridia-stub