Stable <i>TMCO1</i> (wild-type) overexpression suppressed, whereas T33A and S60A mutants recovered, tumor size in xenograft mice.<b>Conclusions:</b> Clinical associations, xenograft mice, and <i>in vitro</i> indications provide solid evidence that the <i>TMCO1</i> gene is a novel tumor suppressor in UBUCs.
Stable <i>TMCO1</i> (wild-type) overexpression suppressed, whereas T33A and S60A mutants recovered, tumor size in xenograft mice.<b>Conclusions:</b> Clinical associations, xenograft mice, and <i>in vitro</i> indications provide solid evidence that the <i>TMCO1</i> gene is a novel tumor suppressor in UBUCs.