Testis Expressed Protein 40 (TEX40)

C11orf20 May be involved in late spermatogenesis. The fusion transcript joins the 5""" exons of ESRRA, encoding a ligand-independent member of the nuclear-hormone receptor superfamily, to the 3""" exons of C11orf20, a conserved but uncharacterized gene located immediately upstream of ESRRA in the reference genome. Targeted resequencing of the corresponding genomic region from two fusion-positive tumor samples identified a nearly clonal chromosomal rearrangement positioning ESRRA upstream of C11orf20 in one tumor, and evidence of local copy number variation in the ESRRA locus in the second tumor. Gene fusions involving adjacent or nearby genes can readily escape detection but may play important roles in the development and progression of cancer.