Identification, length distribution, and motif analysis of linear and spliced peptides by a combined de novo library searching hybrid workflow approach.

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Presentation transcript:

Identification, length distribution, and motif analysis of linear and spliced peptides by a combined de novo library searching hybrid workflow approach. Identification, length distribution, and motif analysis of linear and spliced peptides by a combined de novo library searching hybrid workflow approach. (A and B) More than 50,000 peptides eluted from eight HLA-A–expressing and nine HLA-B–expressing monoallelic cell lines were sequenced and defined as either linear or spliced in origin. (C) Proportion of linear, cis-, or trans-spliced peptides contributing to each HLA allelic dataset. (D) Length [number of amino acid (aa)] distribution of all identified linear and spliced peptides (****P < 0.0001, two-way multiple-comparison ANOVA test). (E) Motif analysis for 9-mer and 10-mer linear and spliced peptides, showing the percentage of enriched amino acids (if greater than 10%) at each of positions P2, P3, and PΩ. (Note that in spliced peptides, L stands for both leucine and isoleucine.) (F) Pearson r value correlation between the amino acids enriched in linear and spliced peptides for each allele at each of positions P2, P3, and PΩ (all data were P < 0.05). Pouya Faridi et al. Sci. Immunol. 2018;3:eaar3947 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works