Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability

Abstract Peritrichously-flagellated bacteria, such as Escherichia coli, self-propel in fluids by using specialised motors to rotate multiple helical filaments. The rotation of each motor is transmitted to a short flexible segment called the hook which in turn transmits it to a flagellar filament, en...

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Autores principales:	Emily E. Riley, Debasish Das, Eric Lauga
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/223a6e40a9224c349d9a2edf18f77b27
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spelling	oai:doaj.org-article:223a6e40a9224c349d9a2edf18f77b272021-12-02T15:07:47ZSwimming of peritrichous bacteria is enabled by an elastohydrodynamic instability10.1038/s41598-018-28319-82045-2322https://doaj.org/article/223a6e40a9224c349d9a2edf18f77b272018-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-28319-8https://doaj.org/toc/2045-2322Abstract Peritrichously-flagellated bacteria, such as Escherichia coli, self-propel in fluids by using specialised motors to rotate multiple helical filaments. The rotation of each motor is transmitted to a short flexible segment called the hook which in turn transmits it to a flagellar filament, enabling swimming of the whole cell. Since multiple motors are spatially distributed on the body of the organism, one would expect the propulsive forces from the filaments to push against each other leading to negligible swimming. We use a combination of computations and theory to show that the swimming of peritrichous bacteria is enabled by an elastohydrodynamic bending instability occurring for hooks more flexible than a critical threshold. Using past measurements of hook bending stiffness, we demonstrate how real bacteria are safely on the side of the instability that promotes systematic swimming.Emily E. RileyDebasish DasEric LaugaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-7 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Emily E. Riley Debasish Das Eric Lauga Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability
description	Abstract Peritrichously-flagellated bacteria, such as Escherichia coli, self-propel in fluids by using specialised motors to rotate multiple helical filaments. The rotation of each motor is transmitted to a short flexible segment called the hook which in turn transmits it to a flagellar filament, enabling swimming of the whole cell. Since multiple motors are spatially distributed on the body of the organism, one would expect the propulsive forces from the filaments to push against each other leading to negligible swimming. We use a combination of computations and theory to show that the swimming of peritrichous bacteria is enabled by an elastohydrodynamic bending instability occurring for hooks more flexible than a critical threshold. Using past measurements of hook bending stiffness, we demonstrate how real bacteria are safely on the side of the instability that promotes systematic swimming.
format	article
author	Emily E. Riley Debasish Das Eric Lauga
author_facet	Emily E. Riley Debasish Das Eric Lauga
author_sort	Emily E. Riley
title	Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability
title_short	Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability
title_full	Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability
title_fullStr	Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability
title_full_unstemmed	Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability
title_sort	swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/223a6e40a9224c349d9a2edf18f77b27
work_keys_str_mv	AT emilyeriley swimmingofperitrichousbacteriaisenabledbyanelastohydrodynamicinstability AT debasishdas swimmingofperitrichousbacteriaisenabledbyanelastohydrodynamicinstability AT ericlauga swimmingofperitrichousbacteriaisenabledbyanelastohydrodynamicinstability
_version_	1718388371700580352

Swimming of peritrichous bacteria is enabled by an elastohydrodynamic instability

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