1GHQ Immune System Viral Protein Receptor date Jan 11, 2001
title Cr2-C3d Complex Structure
authors G.Szakonyi, J.M.Guthridge, D.Li, V.M.Holers, X.S.Chen
compound source
Molecule: Complement C3
Chain: A
Fragment: Fragment Of Alpha Chain
Mutation: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606

Molecule: Cr2cd121c3depstein-Barr Virus Receptor
Chain: B, C
Fragment: Sequence Database Residues 21-153

Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
symmetry Space Group: H 3 2
R_factor 0.195 R_Free 0.239
length a length b length c angle alpha angle beta angle gamma
170.000 170.000 174.000 90.00 90.00 120.00
method X-Ray Diffractionresolution 2.04 Å
ligand NDG, ZN enzyme
related structures by homologous chain: 1LY2, 1QSJ

Primary referenceStructure of complement receptor 2 in complex with its C3d ligand., Szakonyi G, Guthridge JM, Li D, Young K, Holers VM, Chen XS, Science 2001 Jun 1;292(5522):1725-8. PMID:11387479
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (109 Kb) [Save to disk]
  • Biological Unit Coordinates (1ghq.pdb1.gz) 103 Kb
  • LPC: Ligand-Protein Contacts for 1GHQ
  • CSU: Contacts of Structural Units for 1GHQ
  • Likely Quarternary Molecular Structure file(s) for 1GHQ
  • Retrieve 1GHQ in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1GHQ from S2C, [Save to disk]
  • View 1GHQ in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1GHQ
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1GHQ, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1ghqa_, region A [Jmol] [rasmolscript] [script source]
        - Domain d1ghqb1, region B:1-66 [Jmol] [rasmolscript] [script source]
        - Domain d1ghqb2, region B:67-129 [Jmol] [rasmolscript] [script source]
        - Domain d1ghqc1, region C:1-66 [Jmol] [rasmolscript] [script source]
        - Domain d1ghqc2, region C:67-134 [Jmol] [rasmolscript] [script source]
  • Fold representative 1ghq from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1ghq] [1ghq_C] [1ghq_B] [1ghq_A]
  • SWISS-PROT database: [P01024] [P20023]
  • Domain organization of [CO3_HUMAN] [CR2_HUMAN] by SWISSPFAM
  • Domains found in 1GHQ: [CCP] [Thiol-ester_cl ] by SMART
  • Other resources with information on 1GHQ
  • Community annotation for 1GHQ at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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