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Bacterial Motility and Chemotaxis
1992Publisher Summary This chapter summarizes the basic features of bacterial motility and chemotaxis. Bacterial chemotaxis represents one of the simplest behaviors that can be studied. Its popularity as an experimental system stems from several sources. The genetic and biochemical tools have been developed to investigate the biology of enteric bacteria.
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Loss of Bacterial Motility under Pressure
Nature, 1973BACTERIAL motility is thought to be ecologically important, especially in environments containing inadequate nutrients. Many bacteria have highly specialised tactic systems that allow them to detect physical or chemical gradients and to swim either to or away from the source. Motility and chemotaxis seem to be important also in bacterial film formation
R, Meganathan, R E, Marquis
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Flagellar rotation and the mechanism of bacterial motility
Nature, 1974BACTERIAL flagella are generally composed of three morphologically distinguishable regions: (a) the long flagellar filament which accounts for more than 95% of the flagellar protein; (b) the hook, which is generally 80–90 nm long and has a characteristic shape, and (c) the basal structure which is composed of an intricate set of disks and rods ...
M, Silverman, M, Simon
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Polymer confinement and bacterial gliding motility
The European Physical Journal E, 2005Cyanobacteria and myxobacteria use slime secretion for gliding motility over surfaces. The slime is produced by the nozzle-like pores located on the bacteria surface. To understand the mechanism of gliding motion and its relation to slime polymerization, we have performed molecular dynamics simulations of a molecular nozzle with growing inside polymer ...
J, Jeon, A V, Dobrynin
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Bacterial coexistence driven by motility and spatial competition
Nature, 2020Elucidating elementary mechanisms that underlie bacterial diversity is central to ecology1,2 and microbiome research3. Bacteria are known to coexist by metabolic specialization4, cooperation5 and cyclic warfare6-8. Many species are also motile9, which is studied in terms of mechanism10,11, benefit12,13, strategy14,15, evolution16,17 and ecology18,19 ...
Gude, Sebastian +5 more
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Statistical measures of bacterial motility and chemotaxis
Journal of Theoretical Biology, 1975Abstract This paper presents a model for the three-dimensional microscopic behavior of motile bacteria, and relates its parameters to five practical measures of bacterial motility and chemotaxis (direction correlation function, diffusion constant, persistence time, average velocity, and up/down ratio).
P S, Lovely, F W, Dahlquist
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Functional Aspects of Bacterial Flagellar Motility
CRC Critical Reviews in Microbiology, 1971(1971). Functional Aspects of Bacterial Flagellar Motility. CRC Critical Reviews in Microbiology: Vol. 1, No. 1, pp. 73-103.
Raymond N. Doetsch, Bruce Stocker
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Hydrodynamics of helical-shaped bacterial motility
Physical Review E, 2009To reveal the underlying hydrodynamic mechanism for the directed propulsion of the bacterium Spiroplasma, we formulate a coarse-grained elastic polymer model with domains of alternating helicities along the contour. Using hydrodynamic simulations and analytic arguments, we show that the propagation of helical domain walls leads to the directed ...
Hirofumi, Wada, Roland R, Netz
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A unified theory of bacterial motile behavior
Journal of Theoretical Biology, 1972Abstract A theory is advanced under which chemo-, aero-, and phototactic reactions of motile bacteria are subsumed. It is put forward that these are, in fact, examples of behavioral responses triggered by a critical alteration of the membrane potential.
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Bacterial motility and chemotaxis.
Science progress, 1994Bacteria swim using the only rotary motor identified in biology. The membrane bound motor uses the gradient of protons set up across the cytoplasmic membrane to drive the rotation of a semi-rigid protein helix, the flagellum. Free-swimming bacteria randomly change direction every few seconds, but if a gradient is encountered the direction-changing ...
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