Evidence map›Paper›PMID 24507604›Full record

ArticleBiophysical journal2014

Temporal dynamics of microbial rhodopsin fluorescence reports absolute membrane voltage.

Jennifer H Hou, Veena Venkatachalam, Adam E Cohen

Abstract read
In one paragraph

Article in Biophysical journal, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing 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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

38 citing papers in PubMed.

  1. Review
  2. Absolute voltage mapping using dynamic photocycle control.bioRxiv : the preprint server for biology · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Nitrile Vibrational Lifetimes as Probes of Local Electric Fields.The journal of physical chemistry letters · 2024
    Article
  7. Article
  8. Article
  9. Review
  10. Article
  11. Review
  12. Review
  13. Article
  14. High-speed compressed-sensing fluorescence lifetime imaging microscopy of live cells.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  15. Imaging Voltage with Microbial Rhodopsins.Frontiers in molecular biosciences · 2021
    Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

3 authors.

Jennifer H HouDepartment of Physics, Harvard University, Cambridge, Massachusetts.
Veena VenkatachalamBiophysics Program, Harvard University, Cambridge, Massachusetts.
Adam E CohenDepartment of Physics, Harvard University, Cambridge, Massachusetts; Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts. Electronic address: cohen@chemistry.harvard.edu.

Funding

Optical sensing of voltage, pH, and small molecules using microbial rhodopsinsDP2OD007428 · OD · HARVARD UNIVERSITY · PI COHEN, ADAM EZRA · 2010 to 2010
$2.5M
Engineering Microbial Rhodopsins as Optical Voltage SensorsR01EB012498 · NIBIB · HARVARD UNIVERSITY · PI COHEN, ADAM EZRA · 2011 to 2014
$1.5M
NIBIB NIH HHS R01 EB012498NIBIB NIH HHS R01EB012498-02NIH HHS DP2 OD007428NIH HHS DP2OD007428
6 · The paper itself

Abstract

Plasma membrane voltage is a fundamentally important property of a living cell; its value is tightly coupled to membrane transport, the dynamics of transmembrane proteins, and to intercellular communication. Accurate measurement of the membrane voltage could elucidate subtle changes in cellular physiology, but existing genetically encoded fluorescent voltage reporters are better at reporting relative changes than absolute numbers. We developed an Archaerhodopsin-based fluorescent voltage sensor whose time-domain response to a stepwise change in illumination encodes the absolute membrane voltage. We validated this sensor in human embryonic kidney cells. Measurements were robust to variation in imaging parameters and in gene expression levels, and reported voltage with an absolute accuracy of 10 mV. With further improvements in membrane trafficking and signal amplitude, time-domain encoding of absolute voltage could be applied to investigate many important and previously intractable bioelectric phenomena.

Indexed as

Membrane PotentialsArchaeal ProteinsBiosensing TechniquesCell MembraneFluorescenceHEK293 CellsHumansKineticsOptogeneticsProtein Structure, TertiaryProton PumpsArchaeal Proteinsarchaerhodopsin protein, ArchaeaProton Pumps

Identifiers

PMID24507604
PMCPMC3945107

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.