5JB9

Crystal structure of factor IXa K98T variant in complex with PPACK


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.152 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Releasing the brakes in coagulation Factor IXa by co-operative maturation of the substrate-binding site.

Kristensen, L.H.Olsen, O.H.Blouse, G.E.Brandstetter, H.

(2016) Biochem J 473: 2395-2411

  • DOI: 10.1042/BCJ20160336
  • Primary Citation of Related Structures:  
    5JBB, 5JBA, 5JBC, 5JB8, 5JB9

  • PubMed Abstract: 
  • Coagulation Factor IX is positioned at the merging point of the intrinsic and extrinsic blood coagulation cascades. Factor IXa (activated Factor IX) serves as the trigger for amplification of coagulation through formation of the so-called Xase complex, which is a ternary complex of Factor IXa, its substrate Factor X and the cofactor Factor VIIIa on the surface of activated platelets ...

    Coagulation Factor IX is positioned at the merging point of the intrinsic and extrinsic blood coagulation cascades. Factor IXa (activated Factor IX) serves as the trigger for amplification of coagulation through formation of the so-called Xase complex, which is a ternary complex of Factor IXa, its substrate Factor X and the cofactor Factor VIIIa on the surface of activated platelets. Within the Xase complex the substrate turnover by Factor IXa is enhanced 200000-fold; however, the mechanistic and structural basis for this dramatic enhancement remains only partly understood. A multifaceted approach using enzymatic, biophysical and crystallographic methods to evaluate a key set of activity-enhanced Factor IXa variants has demonstrated a delicately balanced bidirectional network. Essential molecular interactions across multiple regions of the Factor IXa molecule co-operate in the maturation of the active site. This maturation is specifically facilitated by long-range communication through the Ile(212)-Ile(213) motif unique to Factor IXa and a flexibility of the 170-loop that is further dependent on the conformation in the Cys(168)-Cys(182) disulfide bond. Ultimately, the network consists of compensatory brakes (Val(16) and Ile(213)) and accelerators (Tyr(99) and Phe(174)) that together allow for a subtle fine-tuning of enzymatic activity.


    Organizational Affiliation

    Structural Biology Group, Department of Molecular Biology, University of Salzburg, Billrothstrasse 11, 5020 Salzburg, Austria geb@novonordisk.com hans.Brandstetter@sbg.ac.at.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Coagulation factor IXA [auth E]58Homo sapiensMutation(s): 0 
Gene Names: F9
EC: 3.4.21.22
UniProt & NIH Common Fund Data Resources
Find proteins for P00740 (Homo sapiens)
Explore P00740 
Go to UniProtKB:  P00740
PHAROS:  P00740
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Coagulation factor IXB [auth S]235Homo sapiensMutation(s): 1 
Gene Names: F9
EC: 3.4.21.22
UniProt & NIH Common Fund Data Resources
Find proteins for P00740 (Homo sapiens)
Explore P00740 
Go to UniProtKB:  P00740
PHAROS:  P00740
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0G6
Query on 0G6

Download Ideal Coordinates CCD File 
C [auth S]D-phenylalanyl-N-[(2S,3S)-6-{[amino(iminio)methyl]amino}-1-chloro-2-hydroxyhexan-3-yl]-L-prolinamide
C21 H34 Cl N6 O3
DVFLYEYCMMLBTQ-VSZNYVQBSA-O
 Ligand Interaction
DMS
Query on DMS

Download Ideal Coordinates CCD File 
E [auth S]DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
D [auth S]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 3
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000020 (0G6)
Query on PRD_000020
C [auth S]D-Phe-Pro-Arg-CH2ClPeptide-like /  Inhibitor  Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.30 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.152 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.27α = 90
b = 67.05β = 90
c = 97.15γ = 90
Software Package:
Software NamePurpose
iMOSFLMdata reduction
Aimlessdata scaling
MOLREPphasing
REFMACrefinement
Cootmodel building
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-06-01
    Type: Initial release
  • Version 1.1: 2016-08-10
    Changes: Database references
  • Version 1.2: 2016-12-21
    Changes: Non-polymer description
  • Version 1.3: 2018-01-24
    Changes: Source and taxonomy