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Polar flagellar wrapping and lateral flagella jointly contribute to Shewanella putrefaciens environmental spreading.
Kühn, Marco J; Edelmann, Daniel B; Thormann, Kai M.
Afiliación
  • Kühn MJ; Institut für Mikrobiologie und Molekularbiologie, Justus-Liebig-Universität Gießen, Gießen, Germany.
  • Edelmann DB; Institute of Bioengineering and Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
  • Thormann KM; Institut für Mikrobiologie und Molekularbiologie, Justus-Liebig-Universität Gießen, Gießen, Germany.
Environ Microbiol ; 24(12): 5911-5923, 2022 12.
Article en En | MEDLINE | ID: mdl-35722744
ABSTRACT
Flagella enable bacteria to actively spread within the environment. A number of species possess two separate flagellar systems, where in most cases a primary polar flagellar system is supported by distinct secondary lateral flagella under appropriate conditions. Using functional fluorescence tagging on one of these species, Shewanella putrefaciens, as a model system, we explored how two different flagellar systems can exhibit efficient joint function. The S. putrefaciens secondary flagellar filaments are composed as a mixture of two highly homologous non-glycosylated flagellins, FlaA2 and FlaB2 . Both are solely sufficient to form a functional filament, however, full spreading motility through soft agar requires both flagellins. During swimming, lateral flagella emerge from the cell surface at angles between 30° and 50°, and only filaments located close to the cell pole may form a bundle. Upon a directional shift from forward to backward swimming initiated by the main polar flagellum, the secondary filaments flip over and thus support propulsion into either direction. Lateral flagella do not inhibit the wrapping of the polar flagellum around the cell body at high load. Accordingly, screw thread-like motility mediated by the primary flagellum and activity of lateral flagella cumulatively supports spreading through constricted environments such as polysaccharide matrices.
Asunto(s)

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Shewanella putrefaciens Idioma: En Revista: Environ Microbiol Asunto de la revista: MICROBIOLOGIA / SAUDE AMBIENTAL Año: 2022 Tipo del documento: Article País de afiliación: Alemania

Texto completo: 1 Bases de datos: MEDLINE Asunto principal: Shewanella putrefaciens Idioma: En Revista: Environ Microbiol Asunto de la revista: MICROBIOLOGIA / SAUDE AMBIENTAL Año: 2022 Tipo del documento: Article País de afiliación: Alemania