Ca2+ spikes in the flagellum control chemotactic behavior of sperm

Martin Böhmer, Qui Van, Ingo Weyand, Volker Hagen, Michael Beyermann, Midori Matsumoto, Motonori Hoshi, Eilo Hildebrand, Ulrich Benjamin Kaupp

研究成果: Article査読

146 被引用数 (Scopus)

抄録

The events that occur during chemotaxis of sperm are only partly known. As an essential step toward determining the underlying mechanism, we have recorded Ca2+ dynamics in swimming sperm of marine invertebrates. Stimulation of the sea urchin Arbacia punctulata by the chemoattractant or by intracellular cGMP evokes Ca2+ spikes in the flagellum. A Ca2+ spike elicits a turn in the trajectory followed by a period of straight swimming ('turn-and-run'). The train of Ca2+ spikes gives rise to repetitive loop-like movements. When sperm swim in a concentration gradient of the attractant, the Ca2+ spikes and the stimulus function are synchronized, suggesting that precise timing of Ca2+ spikes controls navigation. We identified the peptide asterosap as a chemotactic factor of the starfish Asterias amurensis. The Ca2+ spikes and swimming behavior of sperm from starfish and sea urchin are similar, implying that the signaling pathway of chemotaxis has been conserved for almost 500 million years.

本文言語English
ページ(範囲)2741-2752
ページ数12
ジャーナルEMBO Journal
24
15
DOI
出版ステータスPublished - 2005 8 3

ASJC Scopus subject areas

  • 神経科学(全般)
  • 分子生物学
  • 生化学、遺伝学、分子生物学(全般)
  • 免疫学および微生物学(全般)

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