4CCV

Crystal structure of histidine-rich glycoprotein N2 domain reveals redox activity at an interdomain disulfide bridge: Implications for the regulation of angiogenesis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


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Literature

Crystal Structure of Histidine-Rich Glycoprotein N2 Domain Reveals Redox Activity at an Interdomain Disulfide Bridge: Implications for Angiogenic Regulation.

Kassaar, O.Mcmahon, S.A.Thompson, R.Botting, C.H.Naismith, J.H.Stewart, A.J.

(2014) Blood 123: 1948

  • DOI: 10.1182/blood-2013-11-535963

  • PubMed Abstract: 
  • Histidine-rich glycoprotein (HRG) is a plasma protein consisting of 6 distinct functional domains and is an important regulator of key cardiovascular processes, including angiogenesis and coagulation. The protein is composed of 2 N-terminal domains ( ...

    Histidine-rich glycoprotein (HRG) is a plasma protein consisting of 6 distinct functional domains and is an important regulator of key cardiovascular processes, including angiogenesis and coagulation. The protein is composed of 2 N-terminal domains (N1 and N2), 2 proline-rich regions (PRR1 and PRR2) that flank a histidine-rich region (HRR), and a C-terminal domain. To date, structural information of HRG has largely come from sequence analysis and spectroscopic studies. It is thought that an HRG fragment containing the HRR, released via plasmin-mediated cleavage, acts as a negative regulator of angiogenesis in vivo. However, its release also requires cleavage of a disulphide bond suggesting that its activity is mediated by a redox process. Here, we present a 1.93 Å resolution crystal structure of the N2 domain of serum-purified rabbit HRG. The structure confirms that the N2 domain, which along with the N1 domain, forms an important molecular interaction site on HRG, possesses a cystatin-like fold composed of a 5-stranded antiparallel β-sheet wrapped around a 5-turn α-helix. A native N-linked glycosylation site was identified at Asn184. Moreover, the structure reveals the presence of an S-glutathionyl adduct at Cys185, which has implications for the redox-mediated release of the antiangiogenic cleavage product from HRG.


    Organizational Affiliation

    School of Medicine and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HISTIDINE-RICH GLYCOPROTEIN
A
115Oryctolagus cuniculusMutation(s): 0 
Gene Names: HRG
Find proteins for Q28640 (Oryctolagus cuniculus)
Go to Gene View: HRG
Go to UniProtKB:  Q28640
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
GSH
Query on GSH

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Download CCD File 
A
GLUTATHIONE
C10 H17 N3 O6 S
RWSXRVCMGQZWBV-WDSKDSINSA-N
 Ligand Interaction
BMA
Query on BMA

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Download CCD File 
A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.185 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 77.138α = 90.00
b = 77.138β = 90.00
c = 69.360γ = 120.00
Software Package:
Software NamePurpose
xia2data scaling
PHENIXphasing
xia2data reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-02-19
    Type: Initial release
  • Version 1.1: 2014-04-02
    Type: Database references