The Unp proto-oncogene encodes a nuclear protein.

The mouse Unp gene is related to TRE17, a human oncogene, but is not its mouse homolog. Unp is a ubiquitously expressed gene producing two related mRNAs. The protein product of Unp is localized in the nucleus. Expression of Unp from a highly active promoter results in tumorigenic transformation of NIH3T3 cells injected into athymic mice. Unp therefore encodes a novel nuclear oncoprotein.