Computing the motor torque of Escherichia coli.
dc.contributor.author | Das, Debasish | |
dc.contributor.author | Lauga, Eric Lauga | |
dc.date.accessioned | 2018-11-20T00:31:19Z | |
dc.date.available | 2018-11-20T00:31:19Z | |
dc.date.issued | 2018-07-25 | |
dc.identifier.issn | 1744-683X | |
dc.identifier.uri | https://www.repository.cam.ac.uk/handle/1810/285470 | |
dc.description.abstract | The rotary motor of bacteria is a natural nano-technological marvel that enables cell locomotion by powering the rotation of semi-rigid helical flagellar filaments in fluid environments. It is well known that the motor operates essentially at constant torque in counter-clockwise direction but past work have reported a large range of values of this torque. Focusing on Escherichia coli cells that are swimming and cells that are stuck on a glass surface for which all geometrical and environmental parameters are known (N. C. Darnton et al., J. Bacteriol., 2007, 189, 1756-1764), we use two validated numerical methods to compute the value of the motor torque consistent with experiments. Specifically, we use (and compare) a numerical method based on the boundary integral representation of Stokes flow and also develop a hybrid method combining boundary element and slender body theory to model the cell body and flagellar filament, respectively. Using measured rotation speed of the motor, our computations predict a value of the motor torque in the range 440 pN nm to 829 pN nm, depending critically on the distance between the flagellar filaments and the nearby surface. | |
dc.format.medium | ||
dc.language | eng | |
dc.publisher | Royal Society of Chemistry (RSC) | |
dc.subject | Escherichia coli | |
dc.subject | Glass | |
dc.subject | Movement | |
dc.subject | Swimming | |
dc.subject | Torque | |
dc.subject | Models, Biological | |
dc.title | Computing the motor torque of Escherichia coli. | |
dc.type | Article | |
prism.endingPage | 5967 | |
prism.issueIdentifier | 29 | |
prism.publicationDate | 2018 | |
prism.publicationName | Soft Matter | |
prism.startingPage | 5955 | |
prism.volume | 14 | |
dc.identifier.doi | 10.17863/CAM.32828 | |
dcterms.dateAccepted | 2018-06-02 | |
rioxxterms.versionofrecord | 10.1039/c8sm00536b | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.licenseref.startdate | 2018-07 | |
dc.contributor.orcid | Lauga, Eric Lauga [0000-0002-8916-2545] | |
dc.identifier.eissn | 1744-6848 | |
dc.publisher.url | http://dx.doi.org/10.1039/c8sm00536b | |
rioxxterms.type | Journal Article/Review | |
pubs.funder-project-id | European Research Council (682754) | |
cam.issuedOnline | 2018 | |
rioxxterms.freetoread.startdate | 2019-07-31 |
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