1IAO	Mhc Ii	date	Mar 13, 1998
title	Class II Mhc I-Ad In Complex With Ovalbumin Peptide 323-339
authors	C.A.Scott, P.A.Peterson, L.Teyton, I.A.Wilson
compound		source
Molecule: Mhc Class II I-Ad Chain: A Engineered: Yes Other_details: Both The A And B Chains Have An 8-Residue (S Peptide Bound To The C-Terminus. The B Chain Also Has A 24- Peptide Consisting Of A 2-Residue (Rg) Signal Sequence, Res - 339 Of Hen Egg Ovalbumin And A 6-Residue (Gsgsgs) Linker, Covalently Bonded To The N-Terminus.;		Organism_scientific: Mus Musculus Organism_common: House Mouse Organism_taxid: 10090 Strain: Balbc Cell_line: S2 Organ: Egg Expression_system: Drosophila Melanogaster Expression_system_common: Fruit Fly Expression_system_taxid: 7227 Expression_system_cell_line: S2 Other_details: Heterologous Expression
Molecule: Mhc Class II I-Ad Chain: B Engineered: Yes Other_details: Both The A And B Chains Have An 8-Residue (S Peptide Bound To The C-Terminus. The B Chain Also Has A 24- Peptide Consisting Of A 2-Residue (Rg) Signal Sequence, Res - 339 Of Hen Egg Ovalbumin And A 6-Residue (Gsgsgs) Linker, Covalently Bonded To The N-Terminus.		Organism_scientific: Mus Musculus Organism_common: House Mouse Organism_taxid: 10090 Strain: Balbc Cell_line: S2 Organ: Egg Expression_system: Drosophila Melanogaster Expression_system_common: Fruit Fly Expression_system_taxid: 7227 Expression_system_cell_line: S2 Other_details: Heterologous Expression
symmetry	Space Group: P 41 21 2	R_factor 0.255 R_Free 0.320
crystal cell	length a length b length c angle alpha angle beta angle gamma 101.300 101.300 92.600 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.60 Å
ligand	NAG	enzyme
related structures	by homologous chain: 1BX2, 1ES0, 1KG0
Gene Ontology	Chain Function Process Component A B
Primary reference	Crystal structures of two I-Ad-peptide complexes reveal that high affinity can be achieved without large anchor residues., Scott CA, Peterson PA, Teyton L, Wilson IA, Immunity 1998 Mar;8(3):319-29. PMID:9529149

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (67 Kb) [Save to disk] Biological Unit Coordinates (1iao.pdb1.gz) 122 Kb Biological Unit Coordinates (1iao.pdb2.gz) 62 Kb LPC: Ligand-Protein Contacts for 1IAO CSU: Contacts of Structural Units for 1IAO Likely Quarternary Molecular Structure file(s) for 1IAO Retrieve 1IAO in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1IAO from S2C, [Save to disk]

View 1IAO 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 1IAO

Ramachandran plot from PDBSum

Structure-derived information

Dipole moment, from Dipole Server at Weizmann Institute 3D motif for 1IAO, from MSDmotif at EBI Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1iaoa2, region A:1-82 [Jmol] [rasmolscript] [script source]     - Domain d1iaoa1, region A:83-178 [Jmol] [rasmolscript] [script source]     - Domain d1iaob2, region B:6-93 [Jmol] [rasmolscript] [script source]     - Domain d1iaob1, region B:94-188 [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: [1iao_A] [1iao_B] [1iao] SWISS-PROT database: [P04228] [P01921] Domain organization of [HA2D_MOUSE] [HB2D_MOUSE] by SWISSPFAM Domains found in 1IAO: [IGc1] [MHC_II_alpha] [MHC_II_beta ] by SMART

Other resources with information on 1IAO

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

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