1EFX	Immune System	date	Feb 10, 2000
title	Structure Of A Complex Between The Human Natural Killer Cell Receptor Kir2dl2 And A Class I Mhc Ligand Hla-Cw3
authors	J.C.Boyington, S.A.Motyka, P.Schuck, A.G.Brooks, P.D.Sun
compound		source
Molecule: Hla-Cw3 (Heavy Chain) Chain: A Fragment: Extracellular Alpha-1, Alpha-2 And Alpha-3 Domains; Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Modified Pet30a
Molecule: Beta-2-Microglobulin Chain: B Engineered: Yes Other_details: Mature Form		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Modified Pet30a
Molecule: Peptide From Importin Alpha-2 Chain: C Fragment: Residues 204-212 Engineered: Yes		Synthetic: Yes Other_details: This Peptide Was Chemically Synthesized. The Sequence Is Naturally Found In Homo Sapiens (Human).;
Molecule: Natural Killer Cell Receptor Kir2dl2 Chain: D, E Fragment: Extracellular D1 And D2 Domains Engineered: Yes		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_plasmid: Modified Pet30a
symmetry	Space Group: P 21 21 21	R_factor 0.231 R_Free 0.294
crystal cell	length a length b length c angle alpha angle beta angle gamma 68.540 90.330 207.270 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	3.00 Å
related structures	by homologous chain: 1B6U, 1E28, 1N3N, 2DL2
Gene Ontology	Chain Function Process Component B protein binding positive regulation of T cel... response to molecule of bact... antigen processing and prese... antigen processing and prese... antigen processing and prese... antigen processing and prese... immune response viral reproduction cytokine-mediated signaling ... T cell differentiation in th... protein refolding response to drug antigen processing and prese... innate immune response response to cadmium ion regulation of defense respon... regulation of immune respons... interferon-gamma-mediated si... Golgi membrane extracellular region extracellular space endoplasmic reticulum lumen plasma membrane external side of plasma memb... ER to Golgi transport vesicl... phagocytic vesicle membrane early endosome membrane early endosome lumen MHC class I protein complex
Primary reference	Crystal structure of an NK cell immunoglobulin-like receptor in complex with its class I MHC ligand., Boyington JC, Motyka SA, Schuck P, Brooks AG, Sun PD, Nature 2000 Jun 1;405(6786):537-43. PMID:10850706

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (127 Kb) [Save to disk] Biological Unit Coordinates (1efx.pdb1.gz) 121 Kb CSU: Contacts of Structural Units for 1EFX Likely Quarternary Molecular Structure file(s) for 1EFX Retrieve 1EFX in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1EFX from S2C, [Save to disk]

View 1EFX 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. On AstexViewer, from MSD-EBI (viewer documentation). On RasMol (Install RasMol freeware) Here's help on how to use RasMol.

Visual 3D analysis of 1EFX

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 1EFX, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1efxa2, region A:1-181 [Jmol] [rasmolscript] [script source]     - Domain d1efxa1, region A:182-278 [Jmol] [rasmolscript] [script source]     - Domain d1efxb_, region B [Jmol] [rasmolscript] [script source]     - Domain d1efxd2, region D:104-200 [Jmol] [rasmolscript] [script source]     - Domain d1efxd1, region D:4-103 [Jmol] [rasmolscript] [script source]     - Domain d1efxe2, region E:104-200 [Jmol] [rasmolscript] [script source]     - Domain d1efxe1, region E:4-103 [Jmol] [rasmolscript] [script source] Fold representative 1efx 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: [1efx_A] [1efx_B] [1efx_C] [1efx_D] [1efx_E] SWISS-PROT database: [P04222] [P61769] [P52292] [P43627] Domain organization of [1C03_HUMAN] [B2MG_HUMAN] [IMA2_HUMAN] [KI2L2_HUMAN] by SWISSPFAM Domains found in 1EFX: [IG] [IG_like] [IGc1 ] by SMART Alignments of the sequence of 1EFX with the sequences similar proteins can be viewed for 1EFX's classification [1C03_HUMAN] [B2MG_HUMAN] [IMA2_HUMAN] [KI2L2_HUMAN] at ProtoMap. Click on "Neighbors List", then on the "See Alignments" button below the list. A sequence distance tree ("phylogenetic tree") can be viewed for 1ACL's classification [1C03_HUMAN] [B2MG_HUMAN] [IMA2_HUMAN] [KI2L2_HUMAN] at ProtoMap. Click on the Cluster number.

Other resources with information on 1EFX

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

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