Purification, crystallization and preliminary X-ray crystallographic studies of swine MHC class I complexed with an

Lei Feng1, Ming-Wei Sun2, Ping Jiang3

  • 1Department of Bioengineering, College of Life Science and Technology, Dalian University, Dalian, Liaoning 116622, PR China; CAS Key Laboratory of Pathogenic Microbiology and Immunology (CASPMI), Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, PR China.

Up to now, no crystal structure of swine leukocyte antigen 2 (SLA-2) molecules was reported. In order to elucidate the structure of SLA-2 and to study the cytotoxic T lymphocyte (CTL) epitopes derived from foot-and-mouth disease virus (FMDV), a complex of swine major histocompatibility complex (MHC) class I molecule (SLA-2 haplotype, Hebao allele) with swine β2-microglobulin and the CTL epitope FMDV-Hu64 (ALLRTATYY) derived from O serotype of FMDV VP1 protein (residues 64-72) was refolded and crystallized. The crystal, which belonged to space group P212121, diffracted to 2.5 Å resolution and had unit cell parameters a = 48.37, b = 97.75, c = 166.163 Å. These results will help to determine the first structure of a SLA-2 molecule in the context of an FMDV CTL epitope.

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