PMID: 8624811 , Related PDB id: UNKNOWN

Authors:

Smith KJ, Reid SW, Stuart DI, McMichael AJ, Jones EY, Bell JI

Title:

An altered position of the alpha 2 helix of MHC class I is revealed by the crystal structure of HLA-B*3501.

Journal:

Immunity. 1996 Mar;4(3):203-13.

Abstract:

The crystal structure of the human major histocompatibility complex class I B allele HLA B*3501 complexed with the 8-mer peptide epitope HIV1 Nef 75-82 (VPLRPMTY) has been determined at 2.0 angstrom resolution. Comparison with the crystal structure of the closely related allele HLA B*5301 reveals the structural basis for the tyrosine specificity of the B*3501 F pocket. The structure also reveals a novel conformation of the 8-mer peptide within the binding groove. The positions of the peptide N and C termini are nonstandard, but the classic pattern of hydrogen bonding to nonpolymorphic MHC class I residues is maintained, at the N terminus by addition of a water molecule, and at the C terminus by a substantial shift in the alpha 2 helix.