Antigen processing and presentation of exogenous peptide antigen via MHC class I
associated omics data
GO:0042590Ontology (GO BP)GO biological process · ~8 member genes
Q-omics provides the Antigen processing and presentation of exogenous peptide antigen via MHC class I (GO:0042590) pathway profile, scoring each patient from the combined activity of its roughly 8 member genes. Pathway activity is associated with patient survival in 25 of 34 cancer types, with the highest sampling consensus in BRCA. Among the 18 cancer types available for tumor–normal comparison, the pathway is differentially active in 12, with the highest sampling consensus in KIRC. Additionally, pathway RNA activity shows 35,104 significant cross-omics associations, again with the highest sampling consensus in STAD. Together, these results highlight BRCA, KIRC, and STAD as cancer lineages where the pathway shows reproducible signals across outcome, tissue activity, and molecular association analyses.
Every result is evaluated using two consensus scores. Sampling consensus measures how consistently a finding is reproduced within a cancer lineage across different conditions. Lineage consensus measures how broadly the result is shared across cancer types, distinguishing pan-cancer signals from lineage-specific patterns. Pathway-against-pathway and pathway-against-mutation comparisons are not available for ontology entities.
Survival associations
This table summarizes Antigen processing and presentation of exogenous peptide antigen via MHC class I survival associations by molecular data type. RNA-level pathway activity shows survival associations in the most cancer types (25). The rightmost column indicates the cancer type with the highest sampling consensus for each layer.
This table ranks reproducible pathway activity–survival associations across cancer types. High Antigen processing and presentation of exogenous peptide antigen via MHC class I activity shows favorable associations in BRCA, BLCA, SKCM, HNSC and ESCA, but unfavorable associations in KIRC. In the BRCA Kaplan–Meier curve the low-activity group declines faster, consistent with the favorable association (log-rank p = .002). BRCA ranks highest by sampling consensus for Antigen processing and presentation of exogenous peptide antigen via MHC class I.
This table summarizes Antigen processing and presentation of exogenous peptide antigen via MHC class I tumor–normal activity differences by data type. RNA-level activity shows significant tumor–normal differences in 12 cancer types, while mass-spec protein activity shows differences in 3. The strongest signals are in KIRC for RNA and CCRCC for protein.
This table ranks reproducible tumor–normal activity differences for the pathway. A positive fold-change indicates higher activity in tumor tissue. The pathway shows higher tumor activity across KIRC and lower tumor activity in HNSC, COAD, LUSC, UCEC and LUAD. In the KIRC box plot, tumor samples show higher pathway activity than matched normal samples (log2 FC = +0.051, t-test p < 0.001).
This table shows molecular features associated with Antigen processing and presentation of exogenous peptide antigen via MHC class I pathway activity in patient tissues and cancer cell lines. In patient samples, pathway activity is most strongly linked to RNA and protein features, with the largest associated set in STAD. In cancer cell lines, RNA-expression features and functional dependencies dominate, with the largest set in BLOOD_Lymphoma.
