Haloplasma contractile
Scientific classification

Rainey, da Costa, Antunes & Huber, 2008[1][2]

Rainey, da Costa, Antunes & Huber, 2008[1]

Antunes, Rainey, da Costa & Huber, 2008[1]
H. contractile
Binomial name
Haloplasma contractile
Antunes, Rainey, da Costa & Huber, 2008[1]

Haloplasma contractile is a halophilic, cell wall-less bacterium. It is the only known representative of a deep lineage, and is classified in its own family (Haloplasmataceae) and order (Haloplasmatales), in the class Mollicutes.[1] In terms of genetics, the bacterium Haloplasma contractile contains a dcwgene cluster is responsible for containing all the genes of the organism and promoting peptidoglycan synthesis. Also, MreB/Mbl are specific homologous parts of this bacterium that are vital in the contractility of the cell. In regards to its physical attributes, this organism consists of a spherical body with approximately two protrusions which alternate between straight and contracted forms.


  1. ^ a b c d e André Antunes; Fred A. Rainey; Gerhard Wanner; Marco Taborda; Jürgen Pätzold; M. Fernanda Nobre; Milton S. da Costa; Robert Huber (2008). "A new lineage of halophilic, wall-less, contractile bacteria from a brine-filled deep of the Red Sea". Journal of Bacteriology. 190 (10): 3580–3587. doi:10.1128/JB.01860-07. PMC 2394993. PMID 18326567.
  2. ^ J. P. Euzéby. "Order Haloplasmatales". List of Prokaryotic names with Standing in Nomenclature.

3. Antunes, A., et al. “A New Lineage of Halophilic, Wall-Less, Contractile Bacteria from a Brine-Filled Deep of the Red Sea.” Journal of Bacteriology, vol. 190, no. 10, July 2008, pp. 3580–3587., doi:10.1128/jb.01860-07.

4. Antunes, A., et al. “Genome Sequence of Haloplasma Contractile, an Unusual Contractile Bacterium from a Deep-Sea Anoxic Brine Lake.” Journal of Bacteriology, vol. 193, no. 17, 2011, pp. 4551–4552., doi:10.1128/jb.05461-11.

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