1QQD	Immune System	date	Jun 03, 1999
title	Crystal Structure Of Hla-Cw4, A Ligand For The Kir2d Natural Killer Cell Inhibitory Receptor
authors	Q.R.Fan, D.C.Wiley
compound		source
Molecule: Histocompatibility Leukocyte Antigen (Hla)-Cw4 (Heavy Chain); Chain: A Fragment: Extracellular Domain Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: Plm-1
Molecule: Beta-2 Microglobulin Chain: B Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: Plm-1
Molecule: Hla-Cw4 Specific Peptide Chain: C Engineered: Yes		Synthetic: Yes Other_details: The Peptide Was Chemically Synthesized. The Nonameric Peptide Contains The Consensus Peptide-Binding Motif For Hla-Cw4, Which Was Determined By Pool Sequencing.
symmetry	Space Group: P 21 21 21	R_factor 0.223 R_Free 0.275
crystal cell	length a length b length c angle alpha angle beta angle gamma 54.960 77.490 108.590 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.70 Å
related structures	by homologous chain: 1CG9, 1ZHB
Gene Ontology	Chain Function Process Component B
Primary reference	Structure of human histocompatibility leukocyte antigen (HLA)-Cw4, a ligand for the KIR2D natural killer cell inhibitory receptor., Fan QR, Wiley DC, J Exp Med 1999 Jul 5;190(1):113-23. PMID:10429675

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (69 Kb) [Save to disk] Biological Unit Coordinates (1qqd.pdb1.gz) 65 Kb CSU: Contacts of Structural Units for 1QQD Likely Quarternary Molecular Structure file(s) for 1QQD Structure Factors (99 Kb) Retrieve 1QQD in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1QQD from S2C, [Save to disk] Re-refined 1qqd structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1QQD 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 1QQD

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 1QQD, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1qqda1, region A:182-274 [Jmol] [rasmolscript] [script source]     - Domain d1qqda2, region A:2-181 [Jmol] [rasmolscript] [script source]     - Domain d1qqdb_, region B [Jmol] [rasmolscript] [script source] 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: [1qqd_C] [1qqd] [1qqd_A] [1qqd_B] SWISS-PROT database: [P30504] [P61769] Domain organization of [1C04_HUMAN] [B2MG_HUMAN] by SWISSPFAM Domain found in 1QQD: [IGc1 ] by SMART

Other resources with information on 1QQD

Community annotation for 1QQD at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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