Cysteine-protease involved in male chromatin remodeling after fertilization co-localizes with alpha-tubulin at mitosis

C Concha, V Morin, P Bustos, A M Geneviere, M M S Heck, M Puchi, M Imschenetzky

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We postulated an essential role for a cysteine-protease in sea urchins sperm histones degradation which follows fertilization. We now report the purification of this enzyme, the determination of its N-terminal amino acid sequence and the localization of the protein with antibodies generated against this amino-terminal peptide. The immunofluorescence data confirmed the presence of this enzyme in the nucleus of unfertilized eggs. After fertilization labeling is observed both in female and male pronuclei suggesting a rapid recruitment of the enzyme to the male pronuclei. Interestingly, we have found that this cysteine-protease persists in the nucleus of the zygotes during S phase of the cell cycle and co-localizes with alpha-tubulin that organizes the mitotic spindle during the initial embryonic cell division. (C) 2004 Wiley-Liss, Inc.

Original languageEnglish
Pages (from-to)602-607
Number of pages6
JournalJournal of Cellular Physiology
Volume202
Issue number2
DOIs
Publication statusPublished - Feb 2005

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