Localization of Tektin 1 at both acrosome and Flagella of mouse and bull spermatozoa

Sayoko Oiki, Erina Hiyama, Takafumi Gotoh, Hiroshi Iida

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Tektins (TEKTs) are constitutive filamentous proteins of microtubules in cilia, flagella, basal bodies, and centrioles. In mammals, five TEKTs (TEKT1, 2, 3, 4, and 5) have been identified in testis and spermatozoa. With the exception of TEKT1, these TEKTs have been reported to be present in spermatozoa with predominant localization at the peri-axoneme structures of flagella, i.e., mitochondria and outer dense fibers. In the present study, we produced an antibody against TEKT1 to examine the localization of TEKT1 in mouse, bull, and rat spermatozoa. By immunoblot analyses and immunofluorescence microscopy, we found TEKT1 to be present in sperm flagella and at the apical region of acrosome cap in spermatozoa of all these species. Acrosome-associated TEKT1 disappeared after in vitro acrosome reaction in mouse spermatozoa. These observations suggest another potential role for TEKT1 as a cytoskeletal element in the sperm head, or as a molecule involved in acrosome-related phenomena, such as acrosome reaction.

Original languageEnglish
Pages (from-to)101-107
Number of pages7
JournalZoological science
Issue number2
Publication statusPublished - Feb 2014

All Science Journal Classification (ASJC) codes

  • Animal Science and Zoology


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