1XKA

FACTOR XA COMPLEXED WITH A SYNTHETIC INHIBITOR FX-2212A,(2S)-(3'-AMIDINO-3-BIPHENYLYL)-5-(4-PYRIDYLAMINO)PENTANOIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for chemical inhibition of human blood coagulation factor Xa.

Kamata, K.Kawamoto, H.Honma, T.Iwama, T.Kim, S.H.

(1998) Proc Natl Acad Sci U S A 95: 6630-6635

  • DOI: 10.1073/pnas.95.12.6630
  • Primary Citation of Related Structures:  
    1XKA, 1XKB

  • PubMed Abstract: 
  • Factor Xa, the converting enzyme of prothrombin to thrombin, has emerged as an alternative (to thrombin) target for drug discovery for thromboembolic diseases. An inhibitor has been synthesized and the crystal structure of the complex between Des[1-44] factor Xa and the inhibitor has been determined by crystallographic methods in two different crystal forms to 2 ...

    Factor Xa, the converting enzyme of prothrombin to thrombin, has emerged as an alternative (to thrombin) target for drug discovery for thromboembolic diseases. An inhibitor has been synthesized and the crystal structure of the complex between Des[1-44] factor Xa and the inhibitor has been determined by crystallographic methods in two different crystal forms to 2.3- and 2.4-A resolution. The racemic mixture of inhibitor FX-2212, (2RS)-(3'-amidino-3-biphenylyl)-5-(4-pyridylamino)pentanoic acid, inhibits factor Xa activity by 50% at 272 nM in vitro. The S-isomer of FX-2212 (FX-2212a) was found to bind to the active site of factor Xa in both crystal forms. The biphenylamidine of FX-2212a occupies the S1-pocket, and the pyridine ring makes hydrophobic interactions with the factor Xa aryl-binding site. Several water molecules meditate inhibitor binding to residues in the active site. In contrast to the earlier crystal structures of factor Xa, such as those of apo-Des[1-45] factor Xa and Des[1-44] factor Xa in complex with a naphthyl inhibitor DX-9065a, two epidermal growth factor-like domains of factor Xa are well ordered in both our crystal forms as well as the region between the two domains, which recently was found to be the binding site of the effector cell protease receptor-1. This structure provides a basis for designing next generation inhibitors of factor Xa.


    Related Citations: 
    • X-Ray Structure of Active Site-Inhibited Clotting Factor Xa. Implications for Drug Design and Substrate Recognition
      Brandstetter, H., Kuhne, A., Bode, W., Huber, R., Von Der Saal, W., Wirthensohn, K., Engh, R.A.
      (1996) J Biol Chem 271: 29988
    • Structure of Human Des(1-45) Factor Xa at 2.2 A Resolution
      Padmanabhan, K., Padmanabhan, K.P., Tulinsky, A., Park, C.H., Bode, W., Huber, R., Blankenship, D.T., Cardin, A.D., Kisiel, W.
      (1993) J Mol Biol 232: 947

    Organizational Affiliation

    Department of Chemistry and Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720-5230, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BLOOD COAGULATION FACTOR XAA [auth L]95Homo sapiensMutation(s): 1 
Gene Names: F10
EC: 3.4.21.6
UniProt & NIH Common Fund Data Resources
Find proteins for P00742 (Homo sapiens)
Explore P00742 
Go to UniProtKB:  P00742
PHAROS:  P00742
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BLOOD COAGULATION FACTOR XAB [auth C]235Homo sapiensMutation(s): 0 
Gene Names: F10
EC: 3.4.21.6
UniProt & NIH Common Fund Data Resources
Find proteins for P00742 (Homo sapiens)
Explore P00742 
Go to UniProtKB:  P00742
PHAROS:  P00742
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
4PP (Subject of Investigation/LOI)
Query on 4PP

Download Ideal Coordinates CCD File 
D [auth C](2S)-(3'-AMIDINO-3-BIPHENYL)-5-(4-PYRIDYLAMINO)PENTANOIC ACID
C23 H24 N4 O2
FJEAIYBDDQAFGU-NRFANRHFSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
CCALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
BHD
Query on BHD
A [auth L]L-PEPTIDE LINKINGC4 H7 N O5ASP
Binding Affinity Annotations 
IDSourceBinding Affinity
4PP PDBBind:  1XKA Ki: 131 (nM) from 1 assay(s)
Binding MOAD:  1XKA Ki: 131 (nM) from 1 assay(s)
BindingDB:  1XKA IC50: min: 2.7, max: 270 (nM) from 2 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.5α = 90
b = 65.8β = 90
c = 81.4γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 1998-03-19 
  • Released Date: 1999-03-23 
  • Deposition Author(s): Kamata, K., Kim, S.H.

Revision History  (Full details and data files)

  • Version 1.0: 1999-03-23
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2012-06-20
    Changes: Non-polymer description