4YHN

Dabigatran Reversal Agent


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure-guided residence time optimization of a dabigatran reversal agent.

Schiele, F.van Ryn, J.Litzenburger, T.Ritter, M.Seeliger, D.Nar, H.

(2015) Mabs 7: 871-880

  • DOI: 10.1080/19420862.2015.1057364
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Novel oral anticoagulants are effective and safe alternatives to vitamin-K antagonists for anticoagulation therapy. However, anticoagulation therapy in general is associated with an elevated risk of bleeding. Idarucizumab is a reversal agent for the ...

    Novel oral anticoagulants are effective and safe alternatives to vitamin-K antagonists for anticoagulation therapy. However, anticoagulation therapy in general is associated with an elevated risk of bleeding. Idarucizumab is a reversal agent for the direct thrombin inhibitor, dabigatran etexilate (Pradaxa®) and is currently in Phase 3 studies. Here, we report data on the antibody fragment aDabi-Fab2, a putative backup molecule for idarucizumab. Although aDabi-Fab2 completely reversed effects of dabigatran in a rat model in vivo, we observed significantly reduced duration of action compared to idarucizumab. Rational protein engineering, based on the X-ray structure of aDabi-Fab2, led to the identification of mutant Y103W. The mutant had optimized shape complementarity to dabigatran while maintaining an energetically favored hydrogen bond. It displayed increased affinity for dabigatran, mainly driven by a slower off-rate. Interestingly, the increased residence time translated into longer duration of action in vivo. It was thus possible to further enhance the efficacy of aDabi-Fab2 based on rational design, giving it the potential to serve as a back-up candidate for idarucizumab.


    Organizational Affiliation

    a New Biological Entities Discovery; Boehringer Ingelheim GmbH & Co. KG ; Biberach , Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
aDabi-Fab3 heavy chain
A, F
222N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
aDabi-Fab3 light chain
B, L
219N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.182 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 55.621α = 88.87
b = 56.142β = 84.87
c = 78.526γ = 65.67
Software Package:
Software NamePurpose
BUSTER-TNTphasing
XDSdata reduction
BUSTERrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-02-27 
  • Released Date: 2016-02-10 
  • Deposition Author(s): Schiele, F., Nar, H.

Revision History 

  • Version 1.0: 2016-02-10
    Type: Initial release