Evidence map›Paper›PMID 27941861›Full record

ArticleNature structural & molecular biology2017

Warfarin and vitamin K compete for binding to Phe55 in human VKOR.

Katrin J Czogalla, Arijit Biswas, Klara Höning, Veit Hornung, Kerstin Liphardt, Matthias Watzka, Johannes Oldenburg

Abstract read
PubMed Publisher
In one paragraph

Article in Nature structural & molecular biology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
5.5field-weighted citation impact, top 4% 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

27 citing papers in PubMed, 49 citations in OpenAlex.

  1. Review
  2. Sex-Related Effect of Chronic Doses of Warfarin and Menadione onInternational journal of molecular sciences · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Effect of Warfarin on Lifespan and Oxidative Stress Tolerance ofInternational journal of molecular sciences · 2025
    Article
  7. Review
  8. Review
  9. Article
  10. Vitamin K-Dependent Proteins in Skeletal Development and Disease.International journal of molecular sciences · 2021
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Review
  16. Determining the necessity of phenyl ring π-character in warfarin.Bioorganic & medicinal chemistry letters · 2019
    Article
  17. Review
  18. Article
  19. Stability of warfarin sodium flavoured preservative-free oral liquid formulations.European journal of hospital pharmacy : science and practice · 2018
    Article
  20. 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

7 authors at 1 institution in 1 country.

Katrin J CzogallaInstitute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany.
Arijit BiswasInstitute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany.
Klara HöningInstitute of Molecular Medicine, University Hospital Bonn, Bonn, Germany.
Veit HornungInstitute of Molecular Medicine, University Hospital Bonn, Bonn, Germany.
Kerstin LiphardtInstitute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany.
Matthias WatzkaInstitute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany.
Johannes OldenburgInstitute of Experimental Haematology and Transfusion Medicine, University Clinic Bonn, Bonn, Germany.
University Hospital Bonn · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vitamin K epoxide reductase (VKOR) catalyzes the reduction of vitamin K quinone and vitamin K 2,3-epoxide, a process essential to sustain γ-carboxylation of vitamin K-dependent proteins. VKOR is also a therapeutic target of warfarin, a treatment for thrombotic disorders. However, the structural and functional basis of vitamin K reduction and the antagonism of warfarin inhibition remain elusive. Here, we identified putative binding sites of both K vitamers and warfarin on human VKOR. The predicted warfarin-binding site was verified by shifted dose-response curves of specified mutated residues. We used CRISPR-Cas9-engineered HEK 293T cells to assess the vitamin K quinone and vitamin K 2,3-epoxide reductase activities of VKOR variants to characterize the vitamin K naphthoquinone head- and isoprenoid side chain-binding regions. Our results challenge the prevailing concept of noncompetitive warfarin inhibition because K vitamers and warfarin share binding sites on VKOR that include Phe55, a key residue binding either the substrate or inhibitor.

Indexed as

BiocatalysisCatalytic DomainDrug ResistanceHEK293 CellsHumansMolecular Docking SimulationOxidation-ReductionPhenylalanineProtein BindingProtein Conformation, alpha-HelicalVitamin K 1Vitamin K 2Vitamin K Epoxide ReductasesWarfarinPhenylalanineVitamin K 1vitamin K1 oxideVitamin K 2Vitamin K Epoxide ReductasesWarfarin

Identifiers

PMID27941861
OpenAlexW2563786685

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.