Across TCGA pan-cancer cohorts, H3-3A mass-spec protein is linked to patient survival in 2 of 34 cancer types, making it a survival-associated H3-3A data layer compared with 23 for mass-spec protein and 4 for mutation status.
The strongest signal is observed in clear cell renal cell carcinoma (CCRCC), where higher H3-3A mass-spec protein is associated with better disease-free survival. In most high-consensus cancer types, elevated H3-3A expression acts as an unfavorable survival marker, although some lineages such as CCRCC show a favorable association.
CCRCC and GBM are the cancer types where H3-3A mass-spec protein most reproducibly stratifies survival.