Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (3D View)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 96.98 kDa 
• Atom Count: 7024 
• Residue Count: 890 
• Unique protein chains: 2

3MCK

Crystal structure of anti-beta-amyloid antibody C705

• DOI: 10.2210/pdb3MCK/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Mus musculus
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2010-03-29 Released: 2011-02-09 
• Deposition Author(s): Teplyakov, A., Obmolova, G., Gilliland, G.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.254 
• R-Value Work: 0.203 
• R-Value Observed: 0.204 

Literature

Antibody modeling assessment.

Almagro, J.C., Beavers, M.P., Hernandez-Guzman, F., Maier, J., Shaulsky, J., Butenhof, K., Labute, P., Thorsteinson, N., Kelly, K., Teplyakov, A., Luo, J., Sweet, R., Gilliland, G.L.

(2011) Proteins 79: 3050-3066

• PubMed: 21935986 
• DOI: 10.1002/prot.23130
• Primary Citation of Related Structures:  
  3MCK


• PubMed Abstract: 
  

A blinded study to assess the state of the art in three-dimensional structure modeling of the variable region (Fv) of antibodies was conducted. Nine unpublished high-resolution x-ray Fab crystal structures covering a wide range of antigen-binding site conformations were used as benchmark to compare Fv models generated by four structure prediction methodologies. The methodologies included two homology modeling strategies independently developed by CCG (Chemical Computer Group) and Accerlys Inc, and two fully automated antibody modeling servers: PIGS (Prediction of ImmunoGlobulin Structure), based on the canonical structure model, and Rosetta Antibody Modeling, based on homology modeling and Rosetta structure prediction methodology. The benchmark structure sequences were submitted to Accelrys and CCG and a set of models for each of the nine antibody structures were generated. PIGS and Rosetta models were obtained using the default parameters of the servers. In most cases, we found good agreement between the models and x-ray structures. The average rmsd (root mean square deviation) values calculated over the backbone atoms between the models and structures were fairly consistent, around 1.2 Å. Average rmsd values of the framework and hypervariable loops with canonical structures (L1, L2, L3, H1, and H2) were close to 1.0 Å. H3 prediction yielded rmsd values around 3.0 Å for most of the models. Quality assessment of the models and the relative strengths and weaknesses of the methods are discussed. We hope this initiative will serve as a model of scientific partnership and look forward to future antibody modeling assessments.

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Organizational Affiliation: 

Centocor R&D, Inc, Radnor, Pennsylvania 19087, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
C705 MONOCLONAL LIGHT CHAIN	A, L	219	Mus musculus	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
C705 MONOCLONAL HEAVY CHAIN	B, H	228	Mus musculus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ACT	B, H	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.254 
• R-Value Work: 0.203 
• R-Value Observed: 0.204 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 172.25	α = 90
b = 78.25	β = 95.45
c = 74.63	γ = 90

Software Package:

Software Name	Purpose
CrystalClear	data collection
MOLREP	phasing
REFMAC	refinement
d*TREK	data reduction
d*TREK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-03-29 
• Released Date: 2011-02-09 
Deposition Author(s): Teplyakov, A., Obmolova, G., Gilliland, G.L.

Revision History 

• Version 1.0: 2011-02-09
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2011-08-10
  Changes: Database references
• Version 1.3: 2011-11-02
  Changes: Database references