Evidence map›Paper›PMID 28438997›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2017

Nucleophilic water attack is not a possible mechanism for O-O bond formation in photosystem II.

Per E M Siegbahn

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. 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
–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

23 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Kinetics of reformation of the SPhotosynthesis research · 2025
    Article
  5. Mechanism of proton release during water oxidation in Photosystem II.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  6. Review
  7. Article
  8. Review
  9. Insights into PSII's SThe journal of physical chemistry letters · 2024
    Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Review
  17. Article
  18. A Theoretical Study of the Recently Suggested MnThe journal of physical chemistry. A · 2020
    Article
  19. Theoretical study of the mechanism of the manganese catalase KatB.Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry · 2019
    Article
  20. Chemical Activity of the Peroxide/Oxide Redox Couple: Case Study of BaChemistry of materials : a publication of the American Chemical Society · 2018
    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

1 author.

Per E M SiegbahnDepartment of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91, Stockholm, Sweden ps@physto.se.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Two different types of mechanisms are at present suggested for the O-O bond-formation step in photosystem II. The first one is a coupling between an oxyl radical and a bridging oxo. The second one is a nucleophilic water attack on a terminal oxo (or oxyl) group. In the present short paper, the six most reasonable versions of the latter mechanism have been studied and compared with the oxo-oxyl mechanism. The barriers are found to be much too high for the water attack, and that mechanism can therefore safely be ruled out. The reason is that the protonated peroxide product is always very high in energy.

Indexed as

Models, ChemicalOxidation-ReductionPhotosystem II Protein ComplexWaterPhotosystem II Protein ComplexWaterdensity functional theorymechanismO2 formationphotosynthesis

Identifiers

PMID28438997
PMCPMC5441723

What OpenQuestion holds

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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.