1fg2 | pdb_00001fg2

CRYSTAL STRUCTURE OF THE LCMV PEPTIDIC EPITOPE GP33 IN COMPLEX WITH THE MURINE CLASS I MHC MOLECULE H-2DB

spinqualitylabelsall models 1fg2, resolution 2.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1fg2 is a 12 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.754Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function HA11_MOUSE Involved in the presentation of foreign antigens to the immune system. 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 Viral escape, first characterized for the lymphocytic choriomeningitis virus (LCMV) in a mouse transgenic for the P14 T cell-receptor (TCR), can be due to mutations in T-cell epitopes. We have measured the affinity between the H-2D(b) containing the wild-type and two of its "viral escape" epitopes, as well as other altered peptide ligands (APL), by using BIACORE analysis, and solved the crystal structure of H-2D(b) in complex with the wild-type peptide at 2.75 A resolution. We show that viral escape is due to a 50 to 100-fold reduction in the level of affinity between the P14 TCR and the binary complexes of the MHC molecule with the different peptides. Structurally, one of the mutations alters a TCR contact residue, while the effect of the other on the binding of the TCR must be indirect through structural rearrangements. The former is a null ligand, while the latter still leads to some central tolerance. This work defines the structural and energetic threshold for viral escape. Viral escape at the molecular level explained by quantitative T-cell receptor/peptide/MHC interactions and the crystal structure of a peptide/MHC complex.,Tissot AC, Ciatto C, Mittl PR, Grutter MG, Pluckthun A J Mol Biol. 2000 Sep 29;302(4):873-85. PMID:10993729 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Beta-2 microglobulin 3D structures MHC 3D structures MHC I 3D structures

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