Evidence map›Paper›PMID 33688046›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Photosynthesis tunes quantum-mechanical mixing of electronic and vibrational states to steer exciton energy transfer.

Jacob S Higgins, Lawson T Lloyd, Sara H Sohail, Marco A Allodi, John P Otto, Rafael G Saer, Ryan E Wood, Sara C Massey, Po-Chieh Ting, Robert E Blankenship and 1 more

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
4.0field-weighted citation impact, top 5% of its field
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

23 citing papers in PubMed, 66 citations in OpenAlex.

  1. Article
  2. Quantum biology: From mechanisms to medicine.Clinical and translational medicine · 2026
    Review
  3. Article
  4. Dissipation Pathways in a Photosynthetic Complex.The journal of physical chemistry letters · 2025
    Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Resonant Vibrational Enhancement of Downhill Energy Transfer in theThe journal of physical chemistry letters · 2024
    Article
  13. Article
  14. Review
  15. The Future of Drug Development with Quantum Computing.Methods in molecular biology (Clifton, N.J.) · 2024
    Review
  16. Article
  17. Review
  18. Article
  19. Review
  20. From antenna to reaction center: Pathways of ultrafast energy and charge transfer in photosystem II.Proceedings of the National Academy of Sciences of the United States of America · 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

11 authors at 2 institutions in 1 country.

Jacob S HigginsDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.ORCID 0000-0002-8496-4899
Lawson T LloydDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.
Sara H SohailDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.
Marco A AllodiDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.ORCID 0000-0002-3289-1659
John P OttoDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.
Rafael G SaerThe Photosynthetic Antenna Research Center, Washington University in St. Louis, St. Louis, MO 63130.
Ryan E WoodDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.
Sara C MasseyDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.
Po-Chieh TingDepartment of Chemistry, The University of Chicago, Chicago, IL 60637.
Robert E BlankenshipThe Photosynthetic Antenna Research Center, Washington University in St. Louis, St. Louis, MO 63130.
Gregory S EngelDepartment of Chemistry, The University of Chicago, Chicago, IL 60637; gsengel@uchicago.edu.
School of the Art Institute of Chicago · USWashington University in St. Louis · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Photosynthetic species evolved to protect their light-harvesting apparatus from photoxidative damage driven by intracellular redox conditions or environmental conditions. The Fenna-Matthews-Olson (FMO) pigment-protein complex from green sulfur bacteria exhibits redox-dependent quenching behavior partially due to two internal cysteine residues. Here, we show evidence that a photosynthetic complex exploits the quantum mechanics of vibronic mixing to activate an oxidative photoprotective mechanism. We use two-dimensional electronic spectroscopy (2DES) to capture energy transfer dynamics in wild-type and cysteine-deficient FMO mutant proteins under both reducing and oxidizing conditions. Under reducing conditions, we find equal energy transfer through the exciton 4-1 and 4-2-1 pathways because the exciton 4-1 energy gap is vibronically coupled with a bacteriochlorophyll-

Indexed as

Energy TransferPhotosynthesisQuantum TheoryBacterial ProteinsCysteineLight-Harvesting Protein ComplexesOxidation-ReductionSpectrum AnalysisVibrationBacterial ProteinsCysteineFMO bacteriochlorophyll protein, BacteriaLight-Harvesting Protein Complexesexcitonic energy transferphotosynthesisquantum effects in biologyultrafast spectroscopyvibronic coupling

Identifiers

PMID33688046
PMCPMC7980405
OpenAlexW3134750680

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.