Evidence map›Paper›PMID 23868262›Full record

ArticleNature2013

Elucidation of the Fe(IV)=O intermediate in the catalytic cycle of the halogenase SyrB2.

Shaun D Wong, Martin Srnec, Megan L Matthews, Lei V Liu, Yeonju Kwak, Kiyoung Park, Caleb B Bell, E Ercan Alp, Jiyong Zhao, Yoshitaka Yoda and 5 more

Abstract read
In one paragraph

Article in Nature, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 111 papers.

0numbers the graph read from it
0cells of the map it votes in
111citing papers in PubMed
9.4field-weighted citation impact, top 1% 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

111 citing papers in PubMed, 252 citations in OpenAlex.

  1. Article
  2. Review
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  4. Total Synthesis of (+)-12-The Journal of organic chemistry · 2026
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  7. Examining Pseudohalide (NJournal of inorganic biochemistry · 2026
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  8. Article
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  10. Article
  11. Mechanism of Lutein tobioRxiv : the preprint server for biology · 2025
    Article
  12. Article
  13. Article
  14. Article
  15. Nuclear resonant vibrational spectroscopy on Na-FeSpectroscopy letters; an international journal for rapid communication · 2025
    Article
  16. Review
  17. Experimental electronic structures of the FeProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  18. Article
  19. Article
  20. Article

51 more citing papers are in PubMed but not listed here.

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

15 authors at 5 institutions in 2 countries.

Shaun D WongDepartment of Chemistry, Stanford University, Stanford, California 94305, USA.
Martin Srnec
Megan L Matthews
Lei V Liu
Yeonju Kwak
Kiyoung Park
Caleb B Bell
E Ercan Alp
Jiyong Zhao
Yoshitaka Yoda
Shinji Kitao
Makoto Seto
Carsten Krebs
J Martin Bollinger
Edward I Solomon
Stanford University · USPennsylvania State University · USArgonne National Laboratory · USKyoto University Research Reactor Institute · JPSPring-8 · JP

Funding

SPECTROSCOPIC STUDIES OF NONHEME IRON ENZYMESR01GM040392 · NIGMS · STANFORD UNIVERSITY · PI SOLOMON, EDWARD I · 1988 to 2021
$8.6M
Mechanism of Taurine: Alpha-Ketoglutarate DioxygenaseR01GM069657 · NIGMS · PENNSYLVANIA STATE UNIVERSITY-UNIV PARK · PI BOLLINGER, JOSEPH M, KREBS, CARSTEN · 2004 to 2016
$2.7M
NIGMS NIH HHS GM-40392NIGMS NIH HHS GM-69657NIGMS NIH HHS R01 GM040392NIGMS NIH HHS R01 GM069657
6 · The paper itself

Abstract

Mononuclear non-haem iron (NHFe) enzymes catalyse a broad range of oxidative reactions, including halogenation, hydroxylation, ring closure, desaturation and aromatic ring cleavage reactions. They are involved in a number of biological processes, including phenylalanine metabolism, the production of neurotransmitters, the hypoxic response and the biosynthesis of secondary metabolites. The reactive intermediate in the catalytic cycles of these enzymes is a high-spin S = 2 Fe(IV)=O species, which has been trapped for a number of NHFe enzymes, including the halogenase SyrB2 (syringomycin biosynthesis enzyme 2). Computational studies aimed at understanding the reactivity of this Fe(IV)=O intermediate are limited in applicability owing to the paucity of experimental knowledge about its geometric and electronic structure. Synchrotron-based nuclear resonance vibrational spectroscopy (NRVS) is a sensitive and effective method that defines the dependence of the vibrational modes involving Fe on the nature of the Fe(IV)=O active site. Here we present NRVS structural characterization of the reactive Fe(IV)=O intermediate of a NHFe enzyme, namely the halogenase SyrB2 from the bacterium Pseudomonas syringae pv. syringae. This intermediate reacts via an initial hydrogen-atom abstraction step, performing subsequent halogenation of the native substrate or hydroxylation of non-native substrates. A correlation of the experimental NRVS data to electronic structure calculations indicates that the substrate directs the orientation of the Fe(IV)=O intermediate, presenting specific frontier molecular orbitals that can activate either selective halogenation or hydroxylation.

Indexed as

BiocatalysisHalogenationHydroxylationIronOxidoreductasesPseudomonas syringaeferryl ironIronOxidoreductases

Identifiers

PMID23868262
PMCPMC4123442
OpenAlexW1995879115

What OpenQuestion holds

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LicenceTDM
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.