2Z4E

Crystal Structure of D-Dimer from Human Fibrin Complexed with Gly-His-Arg-Pro-Tyr-amide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Probing the beta-chain hole of fibrinogen with synthetic peptides that differ at their amino termini

Doolittle, R.F.Pandi, L.

(2007) Biochemistry 46: 10033-10038

  • DOI: 10.1021/bi7010916
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In a recent report, we showed that alanine can replace glycine at the amino terminus of synthetic B-knobs that bind to human fibrin(ogen). We now report a survey of 13 synthetic peptides with the general sequence XHRPYam, all tested with regard to th ...

    In a recent report, we showed that alanine can replace glycine at the amino terminus of synthetic B-knobs that bind to human fibrin(ogen). We now report a survey of 13 synthetic peptides with the general sequence XHRPYam, all tested with regard to their ability to delay fibrinolysis in an in vitro system activated by t-PA, the results being used as measures of binding affinity to the betaC hole. Unexpectedly, some large and bulky amino acids, including methionine and arginine, are effective binders. Amino acids that branch at the beta carbon (valine, isoleucine, and threonine) do not bind effectively. Crystal structures were determined for two of the peptides (GHRPYam and MHRPYam) complexed with fibrin fragment D-dimer; the modeling of various other side chains showed clashing in the cases of beta-carbon substituents. The two crystal structures also showed that the enhanced binding observed with pentapeptides with carboxyl-terminal tyrosine, compared with that of their tetrapeptide equivalents, is attributable to an interaction between the tyrosine side chain and a guanidino group of a nearby arginine (beta406). The equivalent position in gamma-chains of human fibrin(ogen) is occupied by a lysine (gamma338), but in chicken and lamprey fibrin(ogen), it is an arginine, just as occurs in beta chains. Accordingly, the peptides GPRPam and GPRPYam, which are surrogate A-knobs, were tested for their influence on fibrin polymerization with fibrinogen from lamprey and humans. In lampreys, GPRPYam is a significantly better inhibitor, but in humans, it is less effective than GPRPam, indicating that in the lamprey system the same tyrosine-arginine interaction can also occur in the gamma-chain setting.


    Organizational Affiliation

    Department of Chemistry and Biochemistry and Division of Biology, University of California, San Diego, La Jolla, California 92093-0314, USA. rdoolittle@ucsd.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Fibrinogen alpha chain
A, D
87Homo sapiensMutation(s): 0 
Gene Names: FGA
Find proteins for P02671 (Homo sapiens)
Go to Gene View: FGA
Go to UniProtKB:  P02671
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Fibrinogen beta chain
B, E
326Homo sapiensMutation(s): 0 
Gene Names: FGB
Find proteins for P02675 (Homo sapiens)
Go to Gene View: FGB
Go to UniProtKB:  P02675
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Fibrinogen, gamma polypeptide
C, F
324Homo sapiensMutation(s): 0 
Gene Names: FGG
Find proteins for P02679 (Homo sapiens)
Go to Gene View: FGG
Go to UniProtKB:  P02679
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Fibrin B knob (tetrapeptide)
S, T
4N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Fibrin B knob (pentapeptide)
I, J
5Bos taurusMutation(s): 0 
Gene Names: FGB
Find proteins for P02676 (Bos taurus)
Go to Gene View: FGB
Go to UniProtKB:  P02676
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
B, C, E, F
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
E, G, J
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.630α = 90.00
b = 148.690β = 90.00
c = 232.680γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
CNSrefinement
CNSphasing
HKL-2000data reduction
HKL-2000data scaling
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance