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Structural basis of antagonizing the vitamin K catalytic cycle for anticoagulation

Journal Article · · Science

Vitamin K antagonists are widely used anticoagulants that target vitamin K epoxide reductases (VKOR), a family of integral membrane enzymes. To elucidate their catalytic cycle and inhibitory mechanism, we report 11 x-ray crystal structures of human VKOR and pufferfish VKOR-like, with substrates and antagonists in different redox states. Substrates entering the active site in a partially oxidized state form cysteine adducts that induce an open-to-closed conformational change, triggering reduction. Binding and catalysis are facilitated by hydrogen-bonding interactions in a hydrophobic pocket. The antagonists bind specifically to the same hydrogen-bonding residues and induce a similar closed conformation. Thus, vitamin K antagonists act through mimicking the key interactions and conformational changes required for the VKOR catalytic cycle.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1755274
Alternate ID(s):
OSTI ID: 1764245
Journal Information:
Science, Journal Name: Science Journal Issue: 6524 Vol. 371; ISSN 0036-8075
Publisher:
American Association for the Advancement of Science (AAAS)Copyright Statement
Country of Publication:
United States
Language:
English

References (62)

Inversion of 1JCC correlations in 1,n-ADEQUATE spectra: Inverted 1JCC 1,n-ADEQUATE journal July 2012
A general enhancement scheme in heteronuclear multidimensional NMR employing pulsed field gradients journal March 1994
Warfarin: history, tautomerism and activity journal March 2010
Descriptive analysis of the process and quality of oral anticoagulation management in real-life practice in patients with chronic non-valvular atrial fibrillation: the international study of anticoagulation management (ISAM) journal January 2007
Formation of hydroxyvitamin K by vitamin K epoxide reductase of warfarin-resistant rats. journal April 1983
R- and S-Warfarin inhibition of vitamin K and vitamin K 2,3-epoxide reductase activities in the rat. journal May 1982
[20] Processing of X-ray diffraction data collected in oscillation mode book January 1997
Structure of Ero1p, Source of Disulfide Bonds for Oxidative Protein Folding in the Cell journal May 2004
Biochemical characterization of spontaneous mutants of rat VKORC1 involved in the resistance to antivitamin K anticoagulants journal November 2011
Determination of the warfarin inhibition constant Ki for vitamin K 2,3-epoxide reductase complex subunit-1 (VKORC1) using an in vitro DTT-driven assay journal August 2013
Membrane topology of transmembrane proteins: determinants and experimental tools journal October 2014
Synthesis and structure–activity relationships of novel warfarin derivatives journal March 2007
Crystal Structure of the DsbB-DsbA Complex Reveals a Mechanism of Disulfide Bond Generation journal November 2006
New insights into the catalytic mechanism of vitamin K epoxide reductase (VKORC1) - The catalytic properties of the major mutations of rVKORC1 explain the biological cost associated to mutations journal January 2013
Characterization of Warfarin Inhibition Kinetics Requires Stabilization of Intramembrane Vitamin K Epoxide Reductases journal August 2020
A quantum chemical study of the mechanism of action of Vitamin K epoxide reductase (VKOR) journal September 2007
A Fluorescence-Detection Size-Exclusion Chromatography-Based Thermostability Assay for Membrane Protein Precrystallization Screening journal August 2012
Vitamin K epoxide reductase: homology, active site and catalytic mechanism journal June 2004
Voltammetric Method for Determining the Trace Moisture Content of Organic Solvents Based on Hydrogen-Bonding Interactions with Quinones journal March 2010
Membrane Protein Structure in Live Cells: Methodology for Studying Drug Interaction by Mass Spectrometry-Based Footprinting journal December 2017
Use of a site-directed triple mutant to trap intermediates: demonstration that the flavin C(4a)-thiol adduct and reduced flavin are kinetically competent intermediates in mercuric ion reductase journal March 1990
Chemical model studies for the mechanism of vitamin K epoxide reductase journal September 1981
A chemical model for the mechanism of vitamin K epoxide reductase journal September 1983
Mutations in VKORC1 cause warfarin resistance and multiple coagulation factor deficiency type 2 journal February 2004
Structure of a bacterial homologue of vitamin K epoxide reductase journal January 2010
Protein tagging and detection with engineered self-assembling fragments of green fluorescent protein journal January 2005
Engineering and characterization of a superfolder green fluorescent protein journal December 2005
Structures of an intramembrane vitamin K epoxide reductase homolog reveal control mechanisms for electron transfer journal January 2014
Warfarin: from rat poison to clinical use journal December 2017
Warfarin traps human vitamin K epoxide reductase in an intermediate state during electron transfer journal December 2016
Vitamin K epoxide reductase and its paralogous enzyme have different structures and functions journal December 2017
Approaches to Diagnosing and Managing Anticoagulant-Related Bleeding journal October 2012
Effect of VKORC1 Haplotypes on Transcriptional Regulation and Warfarin Dose journal June 2005
Emergency Hospitalizations for Adverse Drug Events in Older Americans journal November 2011
Critical role of a thiolate-quinone charge transfer complex and its adduct form in de novo disulfide bond generation by DsbB journal December 2005
Purified vitamin K epoxide reductase alone is sufficient for conversion of vitamin K epoxide to vitamin K and vitamin K to vitamin KH2 journal December 2006
Vitamin K epoxide reductase prefers ER membrane-anchored thioredoxin-like redox partners journal August 2010
Novel Insight into the Mechanism of the Vitamin K Oxidoreductase (VKOR): ELECTRON RELAY THROUGH Cys journal October 2010
VKORC1L1, an Enzyme Rescuing the Vitamin K 2,3-Epoxide Reductase Activity in Some Extrahepatic Tissues during Anticoagulation Therapy journal August 2013
SURVEY AND SUMMARY: The morph server: a standardized system for analyzing and visualizing macromolecular motions in a database framework journal April 2000
An efficient one-step site-directed and site-saturation mutagenesis protocol journal August 2004
Phaser crystallographic software journal July 2007
Scaling and assessment of data quality journal December 2005
Recent developments in classical density modification journal March 2010
XDS journal January 2010
Towards automated crystallographic structure refinement with phenix.refine journal March 2012
Refinement of Macromolecular Structures by the Maximum-Likelihood Method journal May 1997
Vitamin K: lessons from the past journal December 2004
The vitamin K cycle journal August 2005
Thirteen novel VKORC1 mutations associated with oral anticoagulant resistance: insights into improved patient diagnosis and treatment: New VKORC1 mutations journal January 2011
Evaluation of warfarin resistance using transcription activator-like effector nucleases-mediated vitamin K epoxide reductase knockout HEK293 cells journal August 2013
Stabilization of warfarin‐binding pocket of VKORC 1 and VKORL 1 by a peripheral region determines their different sensitivity to warfarin inhibition journal April 2018
The Discovery of Dicumarol and Its Sequels journal January 1959
A genome-wide scan for common genetic variants with a large influence on warfarin maintenance dose journal August 2008
Functional study of the vitamin K cycle in mammalian cells journal March 2011
A cellular system for quantitation of vitamin K cycle activity: structure-activity effects on vitamin K antagonism by warfarin metabolites journal January 2014
Novel mutations in the VKORC1 gene of wild rats and mice – a response to 50 years of selection pressure by warfarin? journal February 2009
FastCloning: a highly simplified, purification-free, sequence- and ligation-independent PCR cloning method journal January 2011
Hemorrhagic Complications of Anticoagulant and Thrombolytic Treatment journal June 2008
The Genetic Basis of Resistance to Anticoagulants in Rodents journal May 2005
Pharmacogenomics Guided-Personalization of Warfarin and Tamoxifen journal December 2017
Crystallization of Membrane Proteins in Lipidic Mesophases journal January 2011

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