May play a role in the control of androgen receptor (AR) protein steady-state levels. May interact with HSP90AA1, HSP90AB1 and BAG2. Expressed at highest levels in prostate, followed by testis, retina, trachea and optic nerve. Also detected in brain, epididymis, lung, vagina and pituitary. In the prostate, tends to be up-regulated during malignant progression compared to normal epithelium (at protein level). May be up-regulated by SOX9 and SRY. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. Wrong choice of CDS.