Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 44.31 kDa 
• Atom Count: 2438 
• Residue Count: 287 
• Unique protein chains: 2

1NFX

CRYSTAL STRUCTURE OF HUMAN COAGULATION FACTOR XA COMPLEXED WITH RPR208944

• DOI: 10.2210/pdb1NFX/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2002-12-16 Released: 2003-02-25 
• Deposition Author(s): Maignan, S., Guilloteau, J.P.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Work: 0.215 
• R-Value Observed: 0.215 

Literature

Molecular structures of human Factor Xa complexed with ketopiperazine inhibitors: preference for a neutral group in the S1 pocket.

Maignan, S., Guilloteau, J.P., Choi-Sledeski, Y.M., Becker, M.R., Ewing, W.R., Pauls, H.W., Spada, A.P., Mikol, V.

(2003) J Med Chem 46: 685-690

• PubMed: 12593649 
• DOI: 10.1021/jm0203837
• Primary Citation of Related Structures:  
  1NFY, 1NFX, 1NFW, 1NFU


• PubMed Abstract: 
  

The structures of the noncovalent complex of human factor Xa (fXa) with four non-peptide inhibitors containing a central sulfonylpiperazinone scaffold have been determined to about 2.1 A resolution. Highly potent fXa inhibitors containing both neutral groups such as chlorobenzothiophene or chlorothiophene and basic groups such as benzamidine were shown to interact in the S1 pocket through the neutral group whereas the S4 pocket is occupied by the basic moiety. The scaffold comprising the sulfonyl keto piperazine moiety might play a pivotal role in the orientation of substituents, since there is a strong hydrogen bond between Gly219 of fXa and the carbonyl oxygen of the piperazine. This unique "reverse" binding mode is heretofore unreported in fXa and shows that electrostatic interactions in the S1 subsite are not an absolute requirement to maintain high affinity. Selectivity against other serine proteases can be readily explained in light of these structural results. It has opened up new prospects for designing fXa inhibitors with increased oral bioavailability.

---

Organizational Affiliation: 

Department of Structural Biology, Aventis Pharma, 13, Quai J. Guesde, F-94403 Vitry/Seine, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
COAGULATION FACTOR XA, heavy chain	A	254	Homo sapiens	Mutation(s): 0  Gene Names: F10 EC: 3.4.21.6
Find proteins for P00742 (Homo sapiens) Explore P00742  Go to UniProtKB:  P00742
NIH Common Fund Data Resources
PHAROS  P00742 GTEx  ENSG00000126218

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Coagulation factor XA, light chain	B	134	Homo sapiens	Mutation(s): 0  Gene Names: F10 EC: 3.4.21.6
Find proteins for P00742 (Homo sapiens) Explore P00742  Go to UniProtKB:  P00742
NIH Common Fund Data Resources
PHAROS  P00742 GTEx  ENSG00000126218

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
RDR	A	4-[(6-CHLORO-1-BENZOTHIEN-2-YL)SULFONYL]-1-{[1-(2-HYDROXYETHYL)-1H-PYRROLO[3,2-C]PYRIDIN-2-YL]METHYL}PIPERAZIN-2-ONE C22 H21 Cl N4 O4 S2 NZNFLUOJACWZKX-UHFFFAOYSA-N
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
RDR	Ki:  3   nM  Binding MOAD
RDR	Ki:  3   nM  BindingDB
RDR	Ki :  3   nM  PDBBind

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.15 Å
• R-Value Work: 0.215 
• R-Value Observed: 0.215 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.5	α = 90
b = 72.33	β = 90
c = 79.67	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-12-16 
• Released Date: 2003-02-25 
Deposition Author(s): Maignan, S., Guilloteau, J.P.

Revision History 

• Version 1.0: 2003-02-25
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance