Plays an essential role in anchoring sperm head to the tail. Is responsible for the attachment of the coupling apparatus to the sperm nuclear envelope.
Subcellular locations: Nucleus inner membrane, Golgi apparatus
During spermiogenesis, traffics through the Golgi apparatus before reaching the round spermatid inner membrane of the nuclear envelope and later migrates to the coupling apparatus of the sperm during sperm head elongation and differentiation. In mature spermatozoa, is localized to the coupling apparatus of the sperm head and tail in the implementation fossa.
Sperm (at protein level) . Widely expressed . Conflictingly shown to be specifically expressed in testis .