Dynamic velocity response of E. coli powered by proteorhodopsin.

Silvio Bianchi, Giacomo Donini, Maria Cristina Cannarsa, Giacomo Frangipane, Roberto Di Leonardo

Abstract read

In one paragraph

Article in Biophysical reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing 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

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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

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0 citing papers in PubMed.

No citing paper in PubMed yet.

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

5 authors.

Silvio BianchiNANOTEC-CNR, Institute of Nanotechnology, Soft and Living Matter Laboratory, Rome, Italy. Electronic address: silvio.bianchi.phys@gmail.com.

Giacomo Donini"Sapienza" University of Rome, Department of Physics, Rome, Italy.

Maria Cristina Cannarsa"Sapienza" University of Rome, Department of Physics, Rome, Italy.

Giacomo FrangipaneNANOTEC-CNR, Institute of Nanotechnology, Soft and Living Matter Laboratory, Rome, Italy; "Sapienza" University of Rome, Department of Physics, Rome, Italy.

Roberto Di LeonardoNANOTEC-CNR, Institute of Nanotechnology, Soft and Living Matter Laboratory, Rome, Italy; "Sapienza" University of Rome, Department of Physics, Rome, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Escherichia coli swimming motility is powered by the flagellar motor, a rotary nanomachine driven by inward proton flux through its torque-generating stators. How these proton currents arise from proton motive force is often described using a simple circuit model, in which the membrane acts as a capacitor discharging through the flagellar motors and other resistive proton channels. By monitoring the swimming activity of E. coli expressing a light-driven outward proton pump, we probe the dynamical response of the system under tunable optical driving and test the limits of simplified circuit-based description. Our results show that the flagellar motors are not the main sink for proton motive force discharge. Instead, other membrane channels carry a larger proton current and exhibit a nonlinear resistive behavior. Using the same experimental approach, we directly quantify proteorhodopsin pumping activity as a function of illumination wavelength and compare it with previously reported absorption spectra.

Indexed as

Escherichia coliRhodopsins, MicrobialFlagellaLightMovementproteorhodopsinRhodopsins, Microbial

Identifiers

PMID41747892

DOI10.1016/j.bpr.2026.100254

PMCPMC12994061

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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.