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
crystal cell	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 Diffraction	resolution	1.80 Å
ligand	GOL, NAG	enzyme
Gene Ontology	Chain Function Process Component A, B
Primary reference	Rigid-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] (86 Kb) [Save to disk] Biological Unit Coordinates (3osk.pdb1.gz) 81 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

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Structure-derived information

Electron Density related parameters from EDS Electron Density Server, at Upsala Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 3OSK, from MSDmotif at EBI

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)

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