1GHQ image
Deposition Date 2001-01-11
Release Date 2001-06-13
Last Version Date 2024-11-20
Entry Detail
PDB ID:
1GHQ
Keywords:
Immune system/viral protein receptor
Title:
CR2-C3D COMPLEX STRUCTURE
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.04 Å
R-Value Free:
0.23
R-Value Work:
0.19
Space Group:
H 3 2
1GHQ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:COMPLEMENT C3
Gene (Uniprot):C3
Mutations:C17A
Chain IDs:A
Chain Length:308
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:P01024 Pfam ID:PF07678 EC:3.4.21.47
Protein Blast
Polymer Type:polypeptide(L)
Molecule:CR2/CD121/C3D/EPSTEIN-BARR VIRUS RECEPTOR
Gene (Uniprot):CR2
Chain IDs:B, C
Chain Length:134
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:P20023 Pfam ID:PF00084
Ligand Molecules
NDG
ZN
Primary Citation
Structure of complement receptor 2 in complex with its C3d ligand.
Science 292 1725 1728 (2001)
PMID: 11387479 DOI: 10.1126/science.1059118

Abstact

Complement receptor 2 (CR2/CD21) is an important receptor that amplifies B lymphocyte activation by bridging the innate and adaptive immune systems. CR2 ligands include complement C3d and Epstein-Barr virus glycoprotein 350/220. We describe the x-ray structure of this CR2 domain in complex with C3d at 2.0 angstroms. The structure reveals extensive main chain interactions between C3d and only one short consensus repeat (SCR) of CR2 and substantial SCR side-side packing. These results provide a detailed understanding of receptor-ligand interactions in this protein family and reveal potential target sites for molecular drug design.

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Primary Citation of related structures
1GHQ