Biopolymer dynamics driven by helical flagella
نویسندگان
چکیده
منابع مشابه
Synchronization, Slippage, and Unbundling of Driven Helical Flagella
Peritrichous bacteria exploit bundles of helical flagella for propulsion and chemotaxis. Here, changes in the swimming direction (tumbling) are induced by a change of the rotational frequency of some flagella. Employing coarse-grained modeling and simulations, we investigate the dynamical properties of helical flagella bundles driven by mismatched motor torques. Over a broad range of distances ...
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A possible propulsion mechanism at low Reynolds number is the rotation of a flexible filament, tilted with respect to its rotation axis. Using a simple linear model, we establish the non linear torque-force relations for two torque-driven actuation modes. When the rotation of the filament is induced by two perpendicular transverse oscillating torques, the propulsive force increases monotonicall...
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In this study, we attached flagella to liposomes for enhancing liposome mobility (Figure 1 and 2). The flagella were detached from a biflagellate unicellular alga, Chlamydomonas (Chlamydomonas oda12-lc2-bccp), and they were then chemically bonded to the surface of the liposome. We found the mobility of liposomes with flagella was higher than that of liposomes without flagella by measuring a dif...
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Filaments of bacterial flagella are perfect tubular stackings polymerized out of just one kind of building block: the flagellin protein. Surprisingly, they do not form straight tubes, but exhibit a symmetry-breaking coiling into helical shapes which is essential for their biological function as cell "propeller''. The co-existence of two conformational states for flagellin within the filament is...
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A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. It is shown that a current through a bulk metal with a helical spin density wave induces a spin transfer torque, which gives rise to a rotation of the order parameter. The use of spin transfer torque to manipulate the magnetization in bulk systems does not suffer from the obstacles seen f...
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ژورنال
عنوان ژورنال: Physical Review Fluids
سال: 2017
ISSN: 2469-990X
DOI: 10.1103/physrevfluids.2.113102