1KIG

BOVINE FACTOR XA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Unexpected binding mode of tick anticoagulant peptide complexed to bovine factor Xa.

Wei, A.Alexander, R.S.Duke, J.Ross, H.Rosenfeld, S.A.Chang, C.H.

(1998) J.Mol.Biol. 283: 147-154

  • DOI: 10.1006/jmbi.1998.2069

  • PubMed Abstract: 
  • The structure of recombinant tick anticoagulant peptide (rTAP) complexed to bovine factor Xa at 3.0 A resolution reveals the structural basis for the specificity and the high affinity of rTAP. Three N-terminal residues, Tyr501, Asn502 and Arg503, pla ...

    The structure of recombinant tick anticoagulant peptide (rTAP) complexed to bovine factor Xa at 3.0 A resolution reveals the structural basis for the specificity and the high affinity of rTAP. Three N-terminal residues, Tyr501, Asn502 and Arg503, play a critical role in the complex formation as suggested by earlier mutagenic studies and the ornithodorin-thrombin complex. Unexpectedly, the side-chain of Tyr501 is located in the S1 pocket, although factor Xa favors arginine as a P1 residue. Arg503 is located at the aryl binding pocket and forms a salt-bridge with Glu97 of factor Xa. The autolysis loop, which is disordered in the uninhibited factor Xa structure, is involved in the formation of the complex as a part of the secondary binding site. The C-terminal helix of rTAP interacts with factor Xa as a secondary binding determinant. The N-terminal residues of rTAP reorganize during the formation of the factor Xa-rTAP complex from the conformation found in the solution into an extended conformation. The presence of the secondary binding site confirms the proposed two-step kinetic mechanism based on the results of a mutagenesis study.


    Organizational Affiliation

    Department of Chemical and Physical Sciences, The DuPont Pharmaceuticals Company, Wilmington DE 19880, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FACTOR XA
H
241Bos taurusMutation(s): 0 
Gene Names: F10
EC: 3.4.21.6
Find proteins for P00743 (Bos taurus)
Go to Gene View: F10
Go to UniProtKB:  P00743
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
FACTOR XA
L
51Bos taurusMutation(s): 0 
Gene Names: F10
EC: 3.4.21.6
Find proteins for P00743 (Bos taurus)
Go to Gene View: F10
Go to UniProtKB:  P00743
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
ANTICOAGULANT PEPTIDE
I
60Ornithodoros moubataMutation(s): 0 
Find proteins for P17726 (Ornithodoros moubata)
Go to UniProtKB:  P17726
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Work: 0.187 
  • Space Group: P 42 21 2
Unit Cell:
Length (Å)Angle (°)
a = 133.100α = 90.00
b = 133.100β = 90.00
c = 68.800γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-10-28
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance