Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15975.65 
• Atom Count: 1048 
• Residue Count: 139 
• Unique protein chains: 1

1PKO

Myelin Oligodendrocyte Glycoprotein (MOG)

• DOI: 10.2210/pdb1PKO/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli


• Deposited: 2003-06-06 Released: 2003-07-15 
• Deposition Author(s): Schubart, A., Zander, H., Skerra, A., Huber, R., Linington, C., Jacob, U., Breithaupt, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.219 
• R-Value Work: 0.194 

Literature

Structural insights into the antigenicity of myelin oligodendrocyte glycoprotein

Breithaupt, C., Schubart, A., Zander, H., Skerra, A., Huber, R., Linington, C., Jacob, U.

(2003) Proc.Natl.Acad.Sci.USA 100: 9446-9451

• PubMed: 12874380 
• DOI: 10.1073/pnas.1133443100
• Primary Citation of Related Structures:  
  1PKQ


• PubMed Abstract: 
  

Multiple sclerosis is a chronic disease of the central nervous system (CNS) characterized by inflammation, demyelination, and axonal loss. The immunopathogenesis of demyelination in multiple sclerosis involves an autoantibody response to myelin oligodendrocyte glycoprotein (MOG), a type I transmembrane protein located at the surface of CNS myelin. Here we present the crystal structures of the extracellular domain of MOG (MOGIgd) at 1.45-A resolution and the complex of MOGIgd with the antigen-binding fragment (Fab) of the MOG-specific demyelinating monoclonal antibody 8-18C5 at 3.0-A resolution. MOGIgd adopts an IgV like fold with the A'GFCC'C" sheet harboring a cavity similar to the one used by the costimulatory molecule B7-2 to bind its ligand CTLA4. The antibody 8-18C5 binds to three loops located at the membrane-distal side of MOG with a surprisingly dominant contribution made by MOG residues 101-108 containing a strained loop that forms the upper edge of the putative ligand binding site. The sequence R101DHSYQEE108 is unique for MOG, whereas large parts of the remaining sequence are conserved in potentially tolerogenic MOG homologues expressed outside the immuno-privileged environment of the CNS. Strikingly, the only sequence identical to DHSYQEE was found in a Chlamydia trachomatis protein of unknown function, raising the possibility that Chlamydia infections may play a role in the MOG-specific autoimmune response in man. Our data provide the structural basis for the development of diagnostic and therapeutic strategies targeting the pathogenic autoantibody response to MOG.

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Organizational Affiliation: 

Abteilung Strukturforschung, Max-Planck-Institut für Biochemie, Am Klopferspitz 18a, 82152 Martinsried, Germany. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Myelin Oligodendrocyte Glycoprotein	A	139	Rattus norvegicus	Mutation(s): 0  Gene Names: Mog
Find proteins for Q63345 (Rattus norvegicus) Go to UniProtKB:  Q63345

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.219 
• R-Value Work: 0.194 
• Space Group: P 3₂ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 50.234	α = 90.00
b = 50.234	β = 90.00
c = 76.610	γ = 120.00

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
CNS	refinement
DENZO	data reduction
MLPHARE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-06-06 
• Released Date: 2003-07-15 
• Deposition Author(s): Schubart, A., Zander, H., Skerra, A., Huber, R., Linington, C., Jacob, U., Breithaupt, C.

Revision History 

• Version 1.0: 2003-07-15
  Type: Initial release
• Version 1.1: 2008-04-29
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance