3OED

The structure of the complex between complement receptor CR2 and its ligand complement fragment C3d


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.16 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.189 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A crystal structure of the complex between human complement receptor 2 and its ligand C3d.

van den Elsen, J.M.Isenman, D.E.

(2011) Science 332: 608-611

  • DOI: 10.1126/science.1201954

  • PubMed Abstract: 
  • The interaction of complement receptor 2 (CR2)--which is present on B cells and follicular dendritic cells--with its antigen-bound ligand C3d results in an enhanced antibody response, thus providing an important link between the innate and adaptive i ...

    The interaction of complement receptor 2 (CR2)--which is present on B cells and follicular dendritic cells--with its antigen-bound ligand C3d results in an enhanced antibody response, thus providing an important link between the innate and adaptive immune systems. Although a cocrystal structure of a complex between C3d and the ligand-binding domains of CR2 has been published, several aspects of this structure, including the position in C3d of the binding interface, remained controversial because of disagreement with biochemical data. We now report a cocrystal structure of a CR2(SCR1-2):C3d complex at 3.2 angstrom resolution in which the interaction interfaces differ markedly from the previously published structure and are consistent with the biochemical data. It is likely that, in the previous structure, the interaction was influenced by the presence of zinc acetate additive in the crystallization buffer, leading to a nonphysiological complex. Detailed knowledge of the binding interface now at hand gives the potential to exploit the interaction in vaccine design or in therapeutics directed against autoreactive B cells.


    Organizational Affiliation

    Department of Biology and Biochemistry, University of Bath, Bath BA2 7AY, UK. bssjmhve@bath.ac.uk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Complement C3
A, B
310Homo sapiensMutation(s): 1 
Gene Names: C3 (CPAMD1)
Find proteins for P01024 (Homo sapiens)
Go to Gene View: C3
Go to UniProtKB:  P01024
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Complement receptor type 2
C, D
135Homo sapiensMutation(s): 0 
Gene Names: CR2 (C3DR)
Find proteins for P20023 (Homo sapiens)
Go to Gene View: CR2
Go to UniProtKB:  P20023
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.16 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.189 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 146.120α = 90.00
b = 146.120β = 90.00
c = 253.060γ = 120.00
Software Package:
Software NamePurpose
BALBESphasing
ADSCdata collection
HKL-2000data scaling
HKL-2000data reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-03-28
    Type: Database references