3vxq | pdb_00003vxq

H27-14 TCR specific for HLA-A24-Nef134-10

spinqualitylabelsall models 3vxq, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3vxq is a 4 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Related: 3vxm, 3vxn, 3vxo, 3vxp, 3vxr, 3vxs, 3vxt, 3vxu Resources: FirstGlance, OCA, RCSB, PDBsum Publication Abstract from PubMed We investigated the crystal structure of an HLA-A*2402-restricted CTL epitope in the HIV-1 nef gene (Nef134-10) before (pHLA) or after TCR docking. The wild type epitope and two escape mutants were included in the study. Y135F was an early-appearing major mutation, while F139L was a late-appearing mutation which was selected in the patients without Y135F. F139 was an eminent feature of the Nef134-10 epitope. Wild type-specific TCR was less fit to F139L mutant suggesting that F139L is an escape from the CTL against the wild type epitope. Although Y135F mutation disrupted the hydrogen bond to HLA-A*2402 His70, newly formed hydrogen bond between T138 and His70 kept the conformation of the epitope in the reconstituted pMHC. TCR from Y135F- or dually-specific CTL had unique mode of binding to the mutant epitope. Y135F has been reported as a processing mutant but CTL carrying structurally adequate TCR can be found in the patients. Structure of TCR and antigen complexes at an immunodominant CTL epitope in HIV-1 infection.,Shimizu A, Kawana-Tachikawa A, Yamagata A, Han C, Zhu D, Sato Y, Nakamura H, Koibuchi T, Carlson J, Martin E, Brumme CJ, Shi Y, Gao GF, Brumme ZL, Fukai S, Iwamoto A Sci Rep. 2013 Nov 6;3:3097. doi: 10.1038/srep03097. PMID:24192765 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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