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- W2010756468 abstract "Abstract Motivation: The development of epitope-based vaccines crucially relies on the ability to classify Human Leukocyte Antigen (HLA) molecules into sets that have similar peptide binding specificities, termed supertypes. In their seminal work, Sette and Sidney defined nine HLA class I supertypes and claimed that these provide an almost perfect coverage of the entire repertoire of HLA class I molecules. HLA alleles are highly polymorphic and polygenic and therefore experimentally classifying each of these molecules to supertypes is at present an impossible task. Recently, a number of computational methods have been proposed for this task. These methods are based on defining protein similarity measures, derived from analysis of binding peptides or from analysis of the proteins themselves. Results: In this paper we define both peptide derived and protein derived similarity measures, which are based on learning distance functions. The peptide derived measure is defined using a peptide–peptide distance function, which is learned using information about known binding and non-binding peptides. The protein derived similarity measure is defined using a protein–protein distance function, which is learned using information about alleles previously classified to supertypes by Sette and Sidney (1999). We compare the classification obtained by these two complimentary methods to previously suggested classification methods. In general, our results are in excellent agreement with the classifications suggested by Sette and Sidney (1999) and with those reported by Buus et al. (2004). The main important advantage of our proposed distance-based approach is that it makes use of two different and important immunological sources of information—HLA alleles and peptides that are known to bind or not bind to these alleles. Since each of our distance measures is trained using a different source of information, their combination can provide a more confident classification of alleles to supertypes. Contact: tomboy@cs.huji.ac.il; cheny@cs.huji.ac.il" @default.
- W2010756468 created "2016-06-24" @default.
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- W2010756468 date "2007-01-15" @default.
- W2010756468 modified "2023-09-27" @default.
- W2010756468 title "Identifying HLA supertypes by learning distance functions" @default.
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- W2010756468 doi "https://doi.org/10.1093/bioinformatics/btl324" @default.
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