Results 281 to 290 of about 1,608,280 (314)

Actin-based bacterial motility

Current Opinion in Cell Biology, 1995
Listeria monocytogenes and other bacterial pathogens move in the host cell cytoplasm, propelled by continuous actin assembly at one pole of the bacterium. This actin-based motility requires the presence of the bacterial proteins ActA on L. monocytogenes and IcsA on Shigella flexneri.
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Introduction to bacterial motility and chemotaxis

Journal of Chemical Ecology, 1990
Bacteria swim by rotating semirigid, left-handed helical flagellar filaments; counterclockwise (CCW) rotation produces straight swims, known as "runs," and clockwise (CW) rotation generates abrupt changes in direction, known as "tumbles." As a cell moves through its environment, alternately running and tumbling, it detects spatial gradients of ...
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Aliphatic alcohols and bacterial motile behavior

Canadian Journal of Microbiology, 1974
Aliphatic alcohols induced a state of continuous uncoordinated translational movement in Pseudomonas fluorescens, Citrobacter freundii, Alcaligenes faecalis, and Rhodospirillum rubrum. This behavior was reversible and ceased upon removal of the stimulus. A hypothesis based upon electrostatic mechanisms is presented to explain these observations.
C, Biddle, R N, Doetsch
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Bacterial Motility and Chemotaxis

1992
Publisher 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, 1973
BACTERIAL 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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Statistical measures of bacterial motility and chemotaxis

Journal of Theoretical Biology, 1975
Abstract 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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Flagellar rotation and the mechanism of bacterial motility

Nature, 1974
BACTERIAL 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, 2005
Cyanobacteria 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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Hydrodynamics of helical-shaped bacterial motility

Physical Review E, 2009
To 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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