Across TCGA pan-cancer cohorts, MTTP mass-spec protein differs between tumor and matched normal tissue in 2 of 18 cancer types tested, making tumor–normal expression one of MTTP’s most consistent transcriptional readouts.
The strongest signal is observed in clear cell renal cell carcinoma (CCRCC), where MTTP mass-spec protein is repressed in tumor relative to normal tissue. In most cancer types MTTP is over-expressed in tumor, although a few such as CCRCC and COAD show the opposite, repressed pattern.
CCRCC and COAD are the cancer types where MTTP tumor–normal differential expression is most reproducible.