Pyatibratov, Michael G. and Beznosov, Sergey N. and Rachel, Reinhard and Tiktopulo, Elizabeth I. and Surin, Alexei K. and Syutkin, Alexei S. and Fedorov, Oleg V. (2008) Alternative flagellar filament types in the haloarchaeon Haloarcula marismortui. Canadian journal of microbiology 54 (10), pp. 835-844.
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Many Archaea use rotation of helical flagellar filaments for swimming motility. We isolated and characterized the flagellar filaments of Haloarcula marismortui, an archaeal species previously considered to be nonmotile. Two Haloarcula marismortui phenotypes were discriminated--their filaments are composed predominantly of either FlaB or FlaA2 flagellin, and the corresponding genes are located on different replicons. FlaB and FlaA2 filaments differ in antigenicity and thermostability. FlaA2 filaments are distinctly thicker (20-22 nm) than FlaB filaments (16-18 nm). The observed filaments are nearly twice as thick as those of other characterized euryarchaeal filaments. The results suggest that the helicity of Haloarcula marismortui filaments is provided by a mechanism different from that in the related haloarchaeon Halobacterium salinarum, where 2 different flagellin molecules present in comparable quantities are required to form a helical filament.
|Institutions:||Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Lehrstuhl für Mikrobiologie > Prof. Dr. Michael Thomm|
|Subjects:||500 Science > 570 Life sciences|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||22 Mar 2010 07:37|
|Last Modified:||22 Mar 2010 07:37|