Measurement of the Internal Frictional Drag of the Bacterial Flagellar Motor by Fluctuation Analysis.

Renjie Wang, Qiaopeng Chen, Rongjing Zhang, Junhua Yuan

Abstract read

In one paragraph

Article in Biophysical journal, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it

0cells of the map it votes in

1citing papers in PubMed

–field-weighted citation impact

1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

Dynamic stiffening of the flagellar hook.Nature communications · 2022
Article

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Renjie WangHefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Department of Physics, University of Science and Technology of China, Hefei, Anhui, China.

Qiaopeng ChenHefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Department of Physics, University of Science and Technology of China, Hefei, Anhui, China.

Rongjing ZhangHefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Department of Physics, University of Science and Technology of China, Hefei, Anhui, China. Electronic address: rjzhang@ustc.edu.cn.

Junhua YuanHefei National Laboratory for Physical Sciences at the Microscale, Hefei, Anhui, China; Department of Physics, University of Science and Technology of China, Hefei, Anhui, China. Electronic address: jhyuan@ustc.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The bacterial flagellar motor generates the torque that drives the rotation of bacterial flagellar filaments. The torque it generates depends sensitively on the frictional viscous drag on the motor, which includes the frictional viscous drag on the filaments (external load) and the internal frictional viscous drag on the rotor (internal load). The internal load was roughly estimated previously by modeling it as a sphere of a radius of 20 nm rotating in a lipid of viscosity of 100 cp but was never measured experimentally. Here, we measured the internal load by fluctuation analysis of the motor velocity traces. A similar approach should be applicable to other molecular motors.

Indexed as

FlagellaMolecular Motor ProteinsBacteriaBacterial ProteinsRotationTorqueBacterial ProteinsMolecular Motor Proteins

Identifiers

PMID32392462

DOI10.1016/j.bpj.2020.04.020

PMCPMC7264847

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.