2X4O	Immune System	date	Feb 02, 2010
title	Crystal Structure Of Mhc Class I Hla-A2.1 Bound To Hiv-1 Env Peptide Env120-128
authors	P.H.N.Celie, M.Toebes, B.Rodenko, H.Ovaa, A.Perrakis, T.N.M.Schum
compound		source
Molecule: Hla Class I Histocompatibility Antigen, A-2 Alpha Chain: A, D Fragment: Residues 25-299 Synonym: Mhc Class I Antigen A2 Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 469008 Expression_system_strain: Bl21(De3) Expression_system_vector_type: Plasmid
Molecule: Beta-2-Microglobulin Chain: B, E Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_strain: Xli Blue Expression_system_vector_type: Plasmid
Molecule: Envelope Glycoprotein Gp160 Chain: C, F Fragment: Envelope Protein, Residues 120-128 Synonym: Env Polyprotein Engineered: Yes		Synthetic: Yes Organism_scientific: Human Immunodeficiency Virus 1 Organism_taxid: 11676
symmetry	Space Group: P 1 21 1	R_factor 0.175 R_Free 0.239
crystal cell	length a length b length c angle alpha angle beta angle gamma 61.988 81.904 79.748 90.00 90.87 90.00
method	X-Ray Diffraction	resolution	2.30 Å
ligand	GOL, MES	enzyme
Gene Ontology	Chain Function Process Component E, B cellular response to iron io...
Primary reference	UV-induced ligand exchange in MHC class I protein crystals., Celie PH, Toebes M, Rodenko B, Ovaa H, Perrakis A, Schumacher TN, J Am Chem Soc. 2009 Sep 2;131(34):12298-304. PMID:19655750

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (277 Kb) [Save to disk] Biological Unit Coordinates (2x4o.pdb1.gz) 136 Kb Biological Unit Coordinates (2x4o.pdb2.gz) 134 Kb LPC: Ligand-Protein Contacts for 2X4O CSU: Contacts of Structural Units for 2X4O Structure Factors (533 Kb) Retrieve 2X4O in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 2X4O from S2C, [Save to disk] Re-refined 2x4o structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 2X4O 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 2X4O

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 3D motif for 2X4O, from MSDmotif at EBI

Sequence-derived information

View one-letter amino acid or nucleotide sequence for each chain: [2x4o_E] [2x4o_A] [2x4o_D] [2x4o_B] [2x4o] [2x4o_C] [2x4o_F] SWISS-PROT database: Domain organization of by SWISSPFAM Domain found in 2X4O: [IGc1 ] by SMART

Other resources with information on 2X4O

Community annotation for 2X4O at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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