Format

Send to:

Choose Destination
See comment in PubMed Commons below
FEBS Lett. 1998 Jan 9;421(2):95-9.

High structural side chain specificity required at the second position of immunogenic peptides to obtain stable MHC/peptide complexes.

Author information

  • 1Department of Biochemistry and Molecular Biology, University of Ferrara, Italy. gvr@dns.unife.it

Abstract

Peptides binding to HLA-A11 contain a hydrophobic or a small polar amino acid at position 2 and a lysine at the carboxy terminus. Synthetic peptides carrying natural and unnatural amino acids in position 2 were used to determine the requirements for formation of stable HLA-A11/peptide complexes. By kinetic analysis we demonstrate that a stereospecific interaction between the side chain residue in position 2 and a subsite of pocket B is required to obtain stable HLA/peptide complexes. This specific interaction is mediated by a methyl group or by an ethyl group bound to the asymmetric Cbeta atom with the correct configuration. Experiments performed with different peptide sequences suggest that the presence of adequate anchor residues may be sufficient to produce stable HLA/peptide complexes.

PMID:
9468286
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Wiley
    Loading ...
    Write to the Help Desk