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The Journal of Immunology, Vol 145, Issue 1 127-135, Copyright © 1990 by American Association of Immunologists

ARTICLES

Mapping the fine specificity of a cytolytic T cell response to HIV-1 nef protein

S Koenig, TR Fuerst, LV Wood, RM Woods, JA Suzich, GM Jones, VF de la Cruz, RT Davey Jr, S Venkatesan and B Moss
Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.

Epitope mapping of a MHC class I-restricted cytotoxic T cell response to nef, a regulatory protein of HIV, was performed with fresh PBMC from HIV-seropositive donors and target cells pulsed with a panel of overlapping peptides of the nef protein. These nef-specific CTL recognized a synthetic peptide of 10 residues derived from a nonamphipathic, highly conserved region of the nef protein in association with the HLA A3.1 molecule. Using human cell transfectants expressing mutations of the A3 molecule, we demonstrated that the amino acid at position 152 of the A3.1 molecule appears to be critical for detection of this response. Thus, rapid analysis of the epitopes of HIV proteins stimulating CTL responses can be achieved using a combination of fresh donor PBMC and target cells pulsed with synthesized peptides.


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