4X9P

Crystal structure of bovine Annexin A2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.157 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The native structure of annexin A2 peptides in hydrophilic environment determines their anti-angiogenic effects.

Raddum, A.M.Hollas, H.Shumilin, I.A.Henklein, P.Kretsinger, R.Fossen, T.Vedeler, A.

(2015) Biochem. Pharmacol. 95: 1-15

  • DOI: 10.1016/j.bcp.2015.02.013

  • PubMed Abstract: 
  • The progression of aggressive cancer occurs via angiogenesis and metastasis makes these processes important targets for the development of anti-cancer agents. However, recent studies have raised the concern that selective inhibition of angiogenesis r ...

    The progression of aggressive cancer occurs via angiogenesis and metastasis makes these processes important targets for the development of anti-cancer agents. However, recent studies have raised the concern that selective inhibition of angiogenesis results in a switch towards increased tumour growth and metastasis. Since Annexin A2 (AnxA2) is involved in both angiogenesis and metastasis, it may serve as an ideal target for the simultaneous inhibition of both processes. Based on the discovery that domains I (D(I)) and IV (D(IV)) of AnxA2 are potent inhibitors of angiogenesis, we designed seven peptides derived from these domains based on AnxA2 crystal structures. The peptides were expressed as fusion peptides to increase their folding and solubility. Light scattering, far-UV circular dichroism and thermal transition analyses were employed to investigate their aggregation tendencies, α-helical propensity and stability, respectively. 2,2,2-trifluoroethanol (50%) increased the α-helical propensities of all peptides, indicating that they may favour a hydrophobic environment, but did not enhance their thermal stability. D(I)-P2 appears to be the most stable and folded peptide in a hydrophilic environment. The secondary structure of D(I)-P2 was confirmed by nuclear magnetic resonance spectra. The effect of the seven AnxA2 peptides on the formation and integrity of capillary-like networks was studied in a co-culture system mimicking many of the angiogenesis-related processes. Notably, D(I)-P2 inhibited significantly network formation in this system, indicating that the folded D(I)-P2 peptide interferes with vascular endothelial growth factor-dependent pro-angiogenic processes. Thus, this peptide has the potential of being developed further as an anti-angiogenic drug.


    Organizational Affiliation

    Department of Biomedicine, University of Bergen.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Annexin A2
A
343Bos taurusMutation(s): 0 
Gene Names: ANXA2 (ANX2)
Find proteins for P04272 (Bos taurus)
Go to Gene View: ANXA2
Go to UniProtKB:  P04272
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.157 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 48.315α = 90.00
b = 63.274β = 90.00
c = 117.334γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction
MOLREPphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-01-14
    Type: Initial release
  • Version 1.1: 2015-01-28
    Type: Structure summary
  • Version 1.2: 2015-04-01
    Type: Database references
  • Version 1.3: 2015-04-29
    Type: Database references