3OSK Immune System date Sep 09, 2010
title Crystal Structure Of Human Ctla-4 Apo Homodimer
authors C.Yu, A.F.P.Sonnen, S.Ikemizu, D.I.Stuart, R.J.C.Gilbert, S.J.Da
compound source
Molecule: Cytotoxic T-Lymphocyte Protein 4
Chain: A, B
Fragment: Extracellular Domain, Unp Residues 36-161
Synonym: Cytotoxic T-Lymphocyte-Associated Antigen 4, Ctla-
Engineered: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Gene: Cd152, Ctla4
Expression_system: Cricetulus Griseus
Expression_system_common: Chinese Hamster
Expression_system_taxid: 10029
Expression_system_strain: Cho-K1
Expression_system_cell: Ovary Cells
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Pee14
symmetry Space Group: P 21 21 21
R_factor 0.200 R_Free 0.275
length a length b length c angle alpha angle beta angle gamma
43.864 51.457 102.849 90.00 90.00 90.00
method X-Ray Diffractionresolution 1.80 Å
ligand GOL, NAG enzyme
A, B

Primary referenceRigid-body ligand recognition drives cytotoxic T-lymphocyte antigen 4 (CTLA-4) receptor triggering., Yu C, Sonnen AF, George R, Dessailly BH, Stagg LJ, Evans EJ, Orengo CA, Stuart DI, Ladbury JE, Ikemizu S, Gilbert RJ, Davis SJ, J Biol Chem. 2011 Feb 25;286(8):6685-96. Epub 2010 Dec 14. PMID:21156796
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (88 Kb) [Save to disk]
  • Biological Unit Coordinates (3osk.pdb1.gz) 83 Kb
  • LPC: Ligand-Protein Contacts for 3OSK
  • CSU: Contacts of Structural Units for 3OSK
  • Structure Factors (166 Kb)
  • Retrieve 3OSK in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 3OSK from S2C, [Save to disk]
  • Re-refined 3osk structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 3OSK in 3D
  • Proteopedia, because life has more than 2D.
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  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 3OSK
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 3OSK, from MSDmotif at EBI
  • Fold representative 3osk from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [3osk] [3osk_B] [3osk_A]
  • SWISS-PROT database:
  • Domain organization of by SWISSPFAM
  • Domain found in 3OSK: [IGv ] by SMART
  • Other resources with information on 3OSK
  • Community annotation for 3OSK at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
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