1RHP

CRYSTAL STRUCTURE OF RECOMBINANT HUMAN PLATELET FACTOR 4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.241 
  • R-Value Observed: 0.241 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of recombinant human platelet factor 4.

Zhang, X.Chen, L.Bancroft, D.P.Lai, C.K.Maione, T.E.

(1994) Biochemistry 33: 8361-8366

  • DOI: 10.1021/bi00193a025
  • Primary Citation of Related Structures:  
    1RHP

  • PubMed Abstract: 
  • The crystal structure of human platelet factor 4 (PF4) has been solved to a resolution of 2.4 A by molecular replacement and refined to an R-factor of 24.1%. The structure consists of four polypeptide chains which form a tetrameric unit. N-terminal r ...

    The crystal structure of human platelet factor 4 (PF4) has been solved to a resolution of 2.4 A by molecular replacement and refined to an R-factor of 24.1%. The structure consists of four polypeptide chains which form a tetrameric unit. N-terminal residues, previously defined as a random coil or extended loop region, form antiparallel beta-sheet-like structures that form noncovalent associations between dimers. These antiparallel beta-sheet-like structures are positioned lateral to the beta-bilayer motif and stabilize the tetrameric unit. A positively charged ring of lysine and arginine side chains encircles the PF4 tetramer sphere, presenting multiple potential sites and orientations for heparin binding. The electrostatic interactions of multiply charged amino acid side chains and hydrogen bonding interactions at the AB/CD dimer interface serve to stabilize the tetrameric structure further.


    Organizational Affiliation

    Department of Biology, Massachusetts Institute of Technology, Cambridge 02139.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PLATELET FACTOR 4ABCD70Homo sapiensMutation(s): 0 
Gene Names: PF4CXCL4SCYB4
Find proteins for P02776 (Homo sapiens)
Explore P02776 
Go to UniProtKB:  P02776
NIH Common Fund Data Resources
PHAROS  P02776
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.241 
  • R-Value Observed: 0.241 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.2α = 90
b = 86.2β = 90
c = 43.4γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 1994-09-16 
  • Released Date: 1994-11-30 
  • Deposition Author(s): Chen, L., Zhang, X.

Revision History 

  • Version 1.0: 1994-11-30
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance