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Class II MHC quantitative binding motifs derived from a large molecular database with a versatile iterative stepwise
1Medical Information Resources, University of California, San Francisco, 2615 East Clinton Avenue, Fresno, CA 93703, USA. ronna@ucsfresno.edu
Motivation:
The identification of T-cell epitopes can be crucial for vaccine development. An epitope is a peptide segment that binds to both a T-cell receptor and a major histocompatibility complex (MHC) molecule. Predicting which peptide segments bind MHC molecules is the first step in epitope prediction.
Results:
An iterative stepwise discriminant analysis meta-algorithm explores a large molecular database to derive quantitative motifs for peptide binding. The applications presented here demonstrate the algorithm's versatility by producing four closely related models for HLA-DR1. Two models use an expert initial estimate and two do not; two models use amino acid residues as the only predictors and two use amino acid groupings as additional predictors. Each model correctly classifies >90% of the peptides in the database.
Availability:
Software is available commercially; data are free over the Internet.