2Y5H

FACTOR XA - CATION INHIBITOR COMPLEX

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.33 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Molecular Recognition at the Active Site of Factor Xa: Cation-Pi Interactions, Stacking on Planar Peptide Surfaces, and Replacement of Structural Water.

Salonen, L.M., Holland, M.C., Kaib, P.S., Haap, W., Benz, J., Mary, J.L., Kuster, O., Schweizer, W.B., Banner, D.W., Diederich, F.

(2012) Chemistry 18: 213

  • DOI: 10.1002/chem.201102571
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Factor Xa, a serine protease from the blood coagulation cascade, is an ideal enzyme for molecular recognition studies, as its active site is highly shape-persistent and features distinct, concave sub-pockets. We developed a family of non-peptidic, sm ...

    Factor Xa, a serine protease from the blood coagulation cascade, is an ideal enzyme for molecular recognition studies, as its active site is highly shape-persistent and features distinct, concave sub-pockets. We developed a family of non-peptidic, small-molecule inhibitors with a central tricyclic core orienting a neutral heterocyclic substituent into the S1 pocket and a quaternary ammonium ion into the aromatic box in the S4 pocket. The substituents were systematically varied to investigate cation-π interactions in the S4 pocket, optimal heterocyclic stacking on the flat peptide walls lining the S1 pocket, and potential water replacements in both the S1 and the S4 pockets. Structure-activity relationships were established to reveal and quantify contributions to the binding free enthalpy, resulting from single-atom replacements or positional changes in the ligands. A series of high-affinity ligands with inhibitory constants down to K(i)=2 nM were obtained and their proposed binding geometries confirmed by X-ray co-crystal structures of protein-ligand complexes.

    Organizational Affiliation: 

    Laboratorium für Organische Chemie, ETH Zürich, Wolfgang-Pauli-Strasse 10, HCI, 8093 Zürich, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACTIVATED FACTOR XA HEAVY CHAIN
A
234Homo sapiensMutation(s): 1 
Gene Names: F10
EC: 3.4.21.6
Find proteins for P00742 (Homo sapiens)
Go to Gene View: F10
Go to UniProtKB:  P00742
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FACTOR X LIGHT CHAIN
L
54Homo sapiensMutation(s): 0 
Gene Names: F10
EC: 3.4.21.6
Find proteins for P00742 (Homo sapiens)
Go to Gene View: F10
Go to UniProtKB:  P00742
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
Y5H
Query on Y5H
Download SDF File 
Download CCD File 
A
3-[(3AS,4R,5S,8AS,8BR)-4-[2-(5-CHLOROTHIOPHEN-2-YL)-1,3-OXAZOL-4-YL]-1,3-DIOXO-4,6,7,8,8A,8B-HEXAHYDRO-3AH-PYRROLO[3,4-A]PYRROLIZIN-2-YL]PROPYL-TRIMETHYL-AZANIUM
C22 H28 Cl N4 O3 S
JCNHSXPHCSYYCR-QZHFEQFPSA-N
 Ligand Interaction
NA
Query on NA
Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
Y5HKi: 1620 nM BINDINGMOAD
Y5HKi: 1620 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.33 Å
  • R-Value Free: 0.190 
  • R-Value Work: 0.146 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 48.888α = 90.00
b = 74.644β = 90.00
c = 77.082γ = 90.00
Software Package:
Software NamePurpose
SADABSdata scaling
REFMACrefinement
CCP4phasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-12-28
    Type: Initial release
  • Version 1.1: 2012-01-18
    Type: Other