Methanocaldococcus villosus sp. nov., a heavily flagellated archaeon that adheres to surfaces and forms cell-cell contacts

International Journal of Systematic and Evolutionary Microbiology
Annett BellackReinhard Wirth

Abstract

A novel chemolithoautotrophic, hyperthermophilic methanogen was isolated from a submarine hydrothermal system at the Kolbeinsey Ridge, north of Iceland. Based on its 16S rRNA gene sequence, the strain belongs to the order Methanococcales within the genus Methanocaldococcus, with approximately 95 % sequence similarity to Methanocaldococcus jannaschii as its closest relative. Cells of the novel organism stained Gram-negative and appeared as regular to irregular cocci possessing more than 50 polar flagella. These cell appendages mediated not only motility but also adherence to abiotic surfaces and the formation of cell-cell contacts. The new isolate grew at 55-90 °C, with optimum growth at 80 °C. The optimum NaCl concentration for growth was 2.5 % (w/v), and the optimal pH was 6.5. The cells gained their energy exclusively by reduction of CO(2) with H(2). Selenate, tungstate and yeast extract stimulated growth significantly. The genome size was determined to be in the range 1.8-2.0 kb, and the G+C content of the genomic DNA was 30 mol%. Despite being physiologically nearly identical to the other members of the genus Methanocaldococcus, analysis of whole-cell proteins revealed significant differences. Based on the results from phyl...Continue Reading

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Citations

Jan 17, 2012·Applied and Environmental Microbiology·Bastian Herzog, Reinhard Wirth
Jul 3, 2013·Annual Review of Microbiology·Alvaro OrellSonja-Verena Albers
Nov 14, 2012·Research in Microbiology·Kerstin LassakSonja-Verena Albers
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Aug 21, 2014·Frontiers in Microbiology·Alexandra K PerrasChristine Moissl-Eichinger
Nov 24, 2016·Trends in Microbiology·Reinhard Wirth
Jun 27, 2018·FEMS Microbiology Reviews·Christopher T StraubRobert M Kelly
Mar 1, 2018·Nature Communications·Ruth-Sophie TaubnerSimon K-M R Rittmann
May 17, 2011·Nature Reviews. Microbiology·Sonja-Verena Albers, Benjamin H Meyer
Dec 2, 2017·Molecular Microbiology·Paushali ChaudhurySonja-Verena Albers
Mar 18, 2011·FEMS Microbiology Letters·Ken F JarrellJames P J Chong
Aug 12, 2018·Nature Reviews. Microbiology·Marleen van WolferenSonja-Verena Albers
Jun 5, 2020·Acta Crystallographica. Section D, Structural Biology·P N BlankJ A Himmelberger
Jul 1, 2018·Applied Microbiology and Biotechnology·Lisa-Maria MauerhoferSimon K-M R Rittmann
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Jun 11, 2021·PloS One·Marcos F Velho RodriguesEric Lauga
Jun 17, 2021·Applied and Environmental Microbiology·Matthew P HoltenKyle C Costa

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