1A6A	Complex (Transmembrane Glycoprotein)	date	Feb 22, 1998
title	The Structure Of An Intermediate In Class II Mhc Maturation: Bound To Hla-Dr3
authors	P.Ghosh, M.Amaya, E.Mellins, D.C.Wiley
compound		source
Molecule: Hla Class II Histocompatibility Antigen, Dr Alpha Chain: A		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Cell_line: 9.5.3 Cell: B-Lymphocyte Cellular_location: Plasma Membrane
Molecule: Hla Class II Histocompatibility Antigen, Dr-1 Bet Chain: B		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Cell_line: 9.5.3 Cell: B-Lymphocyte Cellular_location: Plasma Membrane
Molecule: Hla Class II Histocompatibility Antigen, Gamma Ch Chain: C Fragment: Clip Fragment 87 - 101 Of Invariant Chain		Organism_scientific: Homo Sapiens Organism_common: Human Organism_taxid: 9606 Cell_line: 9.5.3 Cell: B-Lymphocyte Cellular_location: Plasma Membrane
symmetry	Space Group: P 32 1 2	R_factor 0.246 R_Free 0.325
crystal cell	length a length b length c angle alpha angle beta angle gamma 78.450 78.450 159.100 90.00 90.00 120.00
method	X-Ray Diffraction	resolution	2.75 Å
ligand	NAG	enzyme
related structures	by homologous chain: 1DLH, 1SEB
Gene Ontology	Chain Function Process Component A B
Primary reference	The structure of an intermediate in class II MHC maturation: CLIP bound to HLA-DR3., Ghosh P, Amaya M, Mellins E, Wiley DC, Nature 1995 Nov 30;378(6556):457-62. PMID:7477400

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (69 Kb) [Save to disk] Biological Unit Coordinates (1a6a.pdb1.gz) 64 Kb Biological Unit Coordinates (1a6a.pdb2.gz) 126 Kb LPC: Ligand-Protein Contacts for 1A6A CSU: Contacts of Structural Units for 1A6A Likely Quarternary Molecular Structure file(s) for 1A6A Structure Factors (150 Kb) Retrieve 1A6A in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1A6A from S2C, [Save to disk] Re-refined 1a6a structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1A6A 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 1A6A

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 1A6A, from MSDmotif at EBI Genome occurence of 1A6A's fold from GeneCensus Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1a6aa2, region A:5-81 [Jmol] [rasmolscript] [script source]     - Domain d1a6aa1, region A:82-180 [Jmol] [rasmolscript] [script source]     - Domain d1a6ab2, region B:5-92 [Jmol] [rasmolscript] [script source]     - Domain d1a6ab1, region B:93-191 [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: [1a6a] [1a6a_C] [1a6a_B] [1a6a_A] SWISS-PROT database: [P01912] [P01903] [P04233] Domain organization of [2B13_HUMAN] [DRA_HUMAN] [HG2A_HUMAN] by SWISSPFAM Domains found in 1A6A: [IGc1] [MHC_II_alpha] [MHC_II_beta ] by SMART

Other resources with information on 1A6A

Community annotation for 1A6A at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

Movements, Movies and Images

Domain movements in 1A6A from the Database of Macromolecular Movements. Images from IMB Jena Image Library of Biological Macromolecules.

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