Abstract：
:Prediction of HLA epitopes is important for the development of cancer immunotherapies and vaccines. However, current prediction algorithms have limited predictive power, in part because they were not trained on high-quality epitope datasets covering a broad range of HLA alleles. To enable prediction of endogenous HLA class I-associated peptides across a large fraction of the human population, we used mass spectrometry to profile >185,000 peptides eluted from 95 HLA-A, -B, -C and -G mono-allelic cell lines. We identified canonical peptide motifs per HLA allele, unique and shared binding submotifs across alleles and distinct motifs associated with different peptide lengths. By integrating these data with transcript abundance and peptide processing, we developed HLAthena, providing allele-and-length-specific and pan-allele-pan-length prediction models for endogenous peptide presentation. These models predicted endogenous HLA class I-associated ligands with 1.5-fold improvement in positive predictive value compared with existing tools and correctly identified >75% of HLA-bound peptides that were observed experimentally in 11 patient-derived tumor cell lines.
journal_name
Nat Biotechnoljournal_title
Nature biotechnologyauthors
Sarkizova S,Klaeger S,Le PM,Li LW,Oliveira G,Keshishian H,Hartigan CR,Zhang W,Braun DA,Ligon KL,Bachireddy P,Zervantonakis IK,Rosenbluth JM,Ouspenskaia T,Law T,Justesen S,Stevens J,Lane WJ,Eisenhaure T,Lan Zhang G,doi
10.1038/s41587-019-0322-9subject
Has Abstractpub_date
2020-02-01 00:00:00pages
199-209issue
2eissn
1087-0156issn
1546-1696pii
10.1038/s41587-019-0322-9journal_volume
38pub_type
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