CAGE-1 is a family of proteins overexpressed in tumour tissues compared with surrounding tissues. CAGE-1 gene showed testis-specific expression among normal tissues and displayed wide expression in a variety of cancer cell lines and cancer tissues [1]. CAGE-1 is predominantly expressed during post-meiotic stages. It localises to the acrosomal matrix and acrosomal granule showing it to be a component of the acrosome of mammalian spermatids and spermatozoa [2].

1: Identification and characterization of a novel cancer/testis antigen gene CAGE-1. Park S, Lim Y, Lee D, Cho B, Bang YJ, Sung S, Kim HY, Kim DK, Lee YS, Song Y, Jeoung DI; Biochim Biophys Acta. 2003;1625:173-182. PMID:12531476

2: The cancer/testis antigen CAGE-1 is a component of the acrosome of spermatids and spermatozoa. Alsheimer M, Drewes T, Schutz W, Benavente R; Eur J Cell Biol. 2005;84:445-452. PMID:15819420