1lnu | pdb_00001lnu

CRYSTAL STRUCTURE OF CLASS II MHC MOLECULE IAb BOUND TO EALPHA3K PEPTIDE

spinqualitylabelsall models 1lnu, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1lnu is a 8 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NAG Related: 2iad Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed We have solved the crystal structure of the MHCII molecule, IA(b), containing an antigenic variant of the major IA(b)-binding peptide derived from the MHCII IEalpha chain. The four MHC pockets at p1, p4, p6, and p9 that usually bind peptide side chains are largely empty because of alanines in the peptide at these positions. The complex is nevertheless very stable, apparently because of unique alternate interactions between the IA(b) and peptide. In particular, there are multiple additional hydrogen bonds between the N-terminal end of the peptide and the IA(b) alpha chain and an extensive hydrogen bond network involving an asparagine at p7 position of the peptide and the IA(b) beta chain. By using knowledge of the shape and size of the traditional side chain binding pockets and the additional possible interactions, an IA(b) peptide-binding motif can be deduced that agrees well with the sequences of known IA(b)-binding peptides. Alternate interactions define the binding of peptides to the MHC molecule IA(b).,Liu X, Dai S, Crawford F, Fruge R, Marrack P, Kappler J Proc Natl Acad Sci U S A. 2002 Jun 25;99(13):8820-5. PMID:12084926 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also MHC 3D structures

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