Potential tumor suppressor. Inhibits prostate tumor cell growth, when overexpressed. Ubiquitously expressed, with abundant expression in kidney, skeletal muscle, testis, liver, ovary, and heart and moderate expression in prostate. Expression is significantly reduced in renal and prostate tumors. No differential expression in breast cancer cells, between lobular carcinoma and normal lobules. Found in a common chromosomal region of deletion in breast cancer. Belongs to the DERPC family. Extended N-terminus.