3CCK

Human CD69


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Soluble recombinant CD69 receptors optimized to have an exceptional physical and chemical stability display prolonged circulation and remain intact in the blood of mice

Vanek, O.Nalezkova, M.Kavan, D.Borovickova, I.Pompach, P.Novak, P.Kumar, V.Vannucci, L.Hudecek, J.Hofbauerova, K.Kopecky, V.Brynda, J.Kolenko, P.Dohnalek, J.Kaderavek, P.Chmelik, J.Gorcik, L.Zidek, L.Sklenar, V.Bezouska, K.

(2008) Febs J. 275: 5589-5606

  • DOI: 10.1111/j.1742-4658.2008.06683.x

  • PubMed Abstract: 
  • We investigated the soluble forms of the earliest activation antigen of human leukocyte CD69. This receptor is expressed at the cell surface as a type II homodimeric membrane protein. However, the elements necessary to prepare the soluble recombinant ...

    We investigated the soluble forms of the earliest activation antigen of human leukocyte CD69. This receptor is expressed at the cell surface as a type II homodimeric membrane protein. However, the elements necessary to prepare the soluble recombinant CD69 suitable for structural studies are a matter of controversy. We describe the physical, biochemical and in vivo characteristics of a highly stable soluble form of CD69 obtained by bacterial expression of an appropriate extracellular segment of this protein. Our construct has been derived from one used for CD69 crystallization by further optimization with regard to protein stability, solubility and easy crystallization under conditions promoting ligand binding. The resulting protein is stable at acidic pH and at temperatures of up to 65 degrees C, as revealed by long-term stability tests and thermal denaturation experiments. Protein NMR and crystallography confirmed the expected protein fold, and revealed additional details of the protein characteristics in solution. The soluble CD69 refolded in a form of noncovalent dimers, as revealed by gel filtration, sedimentation velocity measurements, NMR and dynamic light scattering. The soluble CD69 proved to be remarkably stable in vivo when injected into the bloodstream of experimental mice. More than 70% of the most stable CD69 proteins is preserved intact in the blood 24 h after injection, whereas the less stable CD69 variants are rapidly taken up by the liver.


    Organizational Affiliation

    Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Early activation antigen CD69
A, B
118Homo sapiensMutation(s): 0 
Gene Names: CD69 (CLEC2C)
Find proteins for Q07108 (Homo sapiens)
Go to Gene View: CD69
Go to UniProtKB:  Q07108
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.191 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 85.693α = 90.00
b = 85.693β = 90.00
c = 61.881γ = 120.00
Software Package:
Software NamePurpose
HKL-3000data collection
HKL-3000data scaling
REFMACrefinement
HKL-3000data reduction
EPMRphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-11-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance