Across TCGA pan-cancer cohorts, PPP1R21 mass-spec protein is linked to patient survival in 5 of 34 cancer types, making it a survival-associated PPP1R21 data layer compared with 19 for mass-spec protein and 8 for mutation status.
The strongest signal is observed in pancreatic ductal adenocarcinoma (PDAC), where higher PPP1R21 mass-spec protein is associated with better overall survival. In most high-consensus cancer types, elevated PPP1R21 expression acts as an unfavorable survival marker, although some lineages such as PDAC and HNSC show a favorable association.
PDAC, HNSC, and UCEC are the cancer types where PPP1R21 mass-spec protein most reproducibly stratifies survival.