Abstract
A strip-of-helix hydrophobicity algorithm to predict class II MHC-restricted peptides, on the basis of their structural similarity to an amphipathic, α -helix in Ii, also predicted peptides which were presented to cytotoxic T-cells by class I MHC molecules. This algorithm ranked peptides according to mean Kyte-Doolittle hydrophobicity values of amino acids at positions n, n + 4, n + 7, n + 11, n + 14 and n + 18 in a sequence which when coiled as a putative α-helix, had the indicated residues in an axial strip along one side of the helix. Sequences selected for highly scoring, hydrophobic strips were required to have at least 1 of the 4 adjacent strips scoring more negatively than -1 in the strip-of-helix hydrophobicity index and the entire sequence could contain no prolines. This algorithm predicted the class I MHC-restricted, T-cell-presented peptides in sequences of 4 proteins from which some class I MHC-restricted, T-cell-presented sequences had been experimentally determined. Since both class I and class II MHC-restricted peptides could be identified with this algorithm, one can propose that: (I) foreign peptide-binding sites (desetopes) of the class I and class II MHC molecules are structurally similar; and (2) any one T-cell-presented peptide can be presented by some specific allele of both a class I and a class II MHC antigen.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 867-871 |
| Number of pages | 5 |
| Journal | Molecular Immunology |
| Volume | 25 |
| Issue number | 9 |
| DOIs | |
| State | Published - 1988 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Molecular Biology
- Immunology
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Selection of class I MHC-restricted peptides with the strip-of-helix hydrophobicity algorithm. / Reyes, Victor; Chin, L. Thomas; Humphreys, Robert E.
In: Molecular Immunology, Vol. 25, No. 9, 1988, p. 867-871.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Selection of class I MHC-restricted peptides with the strip-of-helix hydrophobicity algorithm
AU - Reyes, Victor
AU - Chin, L. Thomas
AU - Humphreys, Robert E.
PY - 1988
Y1 - 1988
N2 - A strip-of-helix hydrophobicity algorithm to predict class II MHC-restricted peptides, on the basis of their structural similarity to an amphipathic, α -helix in Ii, also predicted peptides which were presented to cytotoxic T-cells by class I MHC molecules. This algorithm ranked peptides according to mean Kyte-Doolittle hydrophobicity values of amino acids at positions n, n + 4, n + 7, n + 11, n + 14 and n + 18 in a sequence which when coiled as a putative α-helix, had the indicated residues in an axial strip along one side of the helix. Sequences selected for highly scoring, hydrophobic strips were required to have at least 1 of the 4 adjacent strips scoring more negatively than -1 in the strip-of-helix hydrophobicity index and the entire sequence could contain no prolines. This algorithm predicted the class I MHC-restricted, T-cell-presented peptides in sequences of 4 proteins from which some class I MHC-restricted, T-cell-presented sequences had been experimentally determined. Since both class I and class II MHC-restricted peptides could be identified with this algorithm, one can propose that: (I) foreign peptide-binding sites (desetopes) of the class I and class II MHC molecules are structurally similar; and (2) any one T-cell-presented peptide can be presented by some specific allele of both a class I and a class II MHC antigen.
AB - A strip-of-helix hydrophobicity algorithm to predict class II MHC-restricted peptides, on the basis of their structural similarity to an amphipathic, α -helix in Ii, also predicted peptides which were presented to cytotoxic T-cells by class I MHC molecules. This algorithm ranked peptides according to mean Kyte-Doolittle hydrophobicity values of amino acids at positions n, n + 4, n + 7, n + 11, n + 14 and n + 18 in a sequence which when coiled as a putative α-helix, had the indicated residues in an axial strip along one side of the helix. Sequences selected for highly scoring, hydrophobic strips were required to have at least 1 of the 4 adjacent strips scoring more negatively than -1 in the strip-of-helix hydrophobicity index and the entire sequence could contain no prolines. This algorithm predicted the class I MHC-restricted, T-cell-presented peptides in sequences of 4 proteins from which some class I MHC-restricted, T-cell-presented sequences had been experimentally determined. Since both class I and class II MHC-restricted peptides could be identified with this algorithm, one can propose that: (I) foreign peptide-binding sites (desetopes) of the class I and class II MHC molecules are structurally similar; and (2) any one T-cell-presented peptide can be presented by some specific allele of both a class I and a class II MHC antigen.
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UR - http://www.scopus.com/inward/citedby.url?scp=0023712880&partnerID=8YFLogxK
U2 - 10.1016/0161-5890(88)90123-X
DO - 10.1016/0161-5890(88)90123-X
M3 - Article
VL - 25
SP - 867
EP - 871
JO - Molecular Immunology
JF - Molecular Immunology
SN - 0161-5890
IS - 9
ER -