Distinct roles of the FliI ATPase and proton motive force in
2008年1月24日 · Here we report that flagellar proteins of Salmonella enterica serovar Typhimurium are exported even in the absence of FliI. A fliH fliI double null mutant was weakly motile. Certain mutations in...
From The Origin of Species to the origin of bacterial flagella
2006年9月5日 · Rotation of bacterial flagella is powered by a proton- or sodium-motive force. The flagellar motor converts electrochemical energy into torque through an interaction between two components:...
Flagellum - Wikipedia
Bacterial flagella rotation is powered by the proton motive force – a flow of H + ions or occasionally by the sodium-motive force – a flow of Na + ions; archaeal flagella rotation is powered by ATP.
An energy transduction mechanism used in bacterial flagellar …
2011年9月20日 · Proton motive force (PMF), the electrochemical potential difference of protons across a biological membrane, is utilized as the energy source of many biological activities, including protein...
Spatiotemporal dynamics of the proton motive force on single
2024年5月23日 · Using a light-activated proton pump and detecting the activity of the bacterial flagellar motor, we perturb and probe the PMF of single cells. Spatially homogeneous PMF perturbations reveal millisecond-scale temporal dynamics and an …
Bacterial proton motive force as an unprecedented target to …
2023年3月10日 · Bacterial proton motive force (PMF), an energetic pathway located on the bacterial membrane, crucially regulates various biological possesses such as adenosine triphosphate synthesis, active transport of molecules, and rotation of bacterial flagella. Nevertheless, the potential of bacterial PMF as an antibacterial target remains largely unexplored.
Biofilms, flagella, and mechanosensing of surfaces by bacteria
2014年9月1日 · Flagellar stators (MotAB) play a critical role in flagellum-mediated surface-sensing. Perturbation of proton motive force or ion flow through the stators appears to be important in response to a surface. One of the major outcomes of flagellar mechanosensing is control of the flagellar master regulator.
The proton flux through the bacterial flagellar motor - Cell Press
Bacterial flagella are driven by a rotary motor that utilizes the free energy stored in the electrochemical proton gradient across the cytoplasmic membrane to do mechanical work. The flux of protons coupled to motor rotation was measured in Streptococcus and found to be directly proportional to motor speed.
Chapter 2 Flagellar Motility in Bacteria: Structure and Function …
2008年1月1日 · Bacterial flagella are filamentous organelles that drive cell locomotion. They thrust cells in liquids (swimming) or on surfaces (swarming) so that cells can move toward favorable environments. At the base of each flagellum, a reversible rotary motor, which is powered by the proton‐ or the sodium‐motive force, is embedded in the cell envelope.
Distinct roles of the FliI ATPase and proton motive force in …
2008年1月24日 · Here we report that flagellar proteins of Salmonella enterica serovar Typhimurium are exported even in the absence of FliI. A fliH fliI double null mutant was weakly motile. Certain mutations in FlhA or FlhB, which form the core of the export gate, substantially improved protein export and motility of the double null mutant.