4TRP

Crystal structure of monoclonal antibody against neuroblastoma associated antigen.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of GD2 Ganglioside and Mimetic Peptide Recognition by 14G2a Antibody.

Horwacik, I.Golik, P.Grudnik, P.Kolinski, M.Zdzalik, M.Rokita, H.Dubin, G.

(2015) Mol.Cell Proteomics 14: 2577-2590

  • DOI: 10.1074/mcp.M115.052720
  • Primary Citation of Related Structures:  4TUJ, 4TUK, 4TUL, 4TUO

  • PubMed Abstract: 
  • Monoclonal antibodies targeting GD2 ganglioside (GD2) have recently been approved for the treatment of high risk neuroblastoma and are extensively evaluated in clinics in other indications. This study illustrates how a therapeutic antibody distinguis ...

    Monoclonal antibodies targeting GD2 ganglioside (GD2) have recently been approved for the treatment of high risk neuroblastoma and are extensively evaluated in clinics in other indications. This study illustrates how a therapeutic antibody distinguishes between different types of gangliosides present on normal and cancer cells and informs how synthetic peptides can imitate ganglioside in its binding to the antibody. Using high resolution crystal structures we demonstrate that the ganglioside recognition by a model antibody (14G2a) is based primarily on an extended network of direct and water molecule mediated hydrogen bonds. Comparison of the GD2-Fab structure with that of a ligand free antibody reveals an induced fit mechanism of ligand binding. These conclusions are validated by directed mutagenesis and allowed structure guided generation of antibody variant with improved affinity toward GD2. Contrary to the carbohydrate, both evaluated mimetic peptides utilize a "key and lock" interaction mechanism complementing the surface of the antibody binding groove exactly as found in the empty structure. The interaction of both peptides with the Fab relies considerably on hydrophobic contacts however, the detailed connections differ significantly between the peptides. As such, the evaluated peptide carbohydrate mimicry is defined primarily in a functional and not in structural manner.


    Organizational Affiliation

    From the ‡Laboratory of Molecular Genetics and Virology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St., 30-387 Krakow, Poland; irena.horwacik@uj.edu.pl.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heavy chain of monoclonal antibody against neuroblastoma associated antigen
H
214N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Light chain of monoclonal antibody against neuroblastoma associated antigen
L
220N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.25 Å
  • R-Value Free: 0.178 
  • R-Value Work: 0.149 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 42.925α = 110.81
b = 46.925β = 92.80
c = 62.358γ = 100.13
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationCountryGrant Number
NCNPolandN302 034 31/3063

Revision History 

  • Version 1.0: 2015-07-15
    Type: Initial release
  • Version 1.1: 2015-07-29
    Type: Database references
  • Version 1.2: 2015-10-14
    Type: Database references