Sperm-Activating Peptide Induces Asymmetric Flagellar Bending in Sea Urchin Sperm
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Accession number;05A0407488
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| Title;Sperm-Activating Peptide Induces Asymmetric Flagellar Bending in Sea Urchin Sperm |
| Author;
SHIBA KOGIKU
(Ochanomizu Univ., Tokyo, Jpn)
OHMURO JUNKO
(Ochanomizu Univ., Tokyo, Jpn)
MOGAMI YOSHIHIRO
(Ochanomizu Univ., Tokyo, Jpn)
NISHIGAKI TAKUYA
(Unam, Morelos, Mex)
WOOD CHRISTOPHER D.
(Unam, Morelos, Mex)
DARSZON ALBERTO
(Unam, Morelos, Mex)
TATSU YOSHIRO
(National Inst. Of Advanced Industrial Sci. And Technol. (aist), Ikeda, Jpn)
YUMOTO NOBORU
(National Inst. Of Advanced Industrial Sci. And Technol. (aist), Ikeda, Jpn)
BABA SHOJI A.
(Ochanomizu Univ., Tokyo, Jpn)
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Journal Title;Zool Sci
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Journal Code:F0012B
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ISSN:0289-0003
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VOL.22;NO.3;PAGE.293-299(2005)
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| Figure&Table&Reference;FIG.6, TBL.2, REF.28 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Speract, a sperm-activating peptide (SAP) from sea urchin eggs, induces various sperm responses including a transient increase in the intracellular Ca2+ concentration. However, it has not been clarified how speract modulates sperm motility and whether it functions as a chemoattractant. To confirm the effect of speract on sperm motility, we observed the flagellar bending response to speract in sperm of Hemicentrotus pulcherrimus, in experiments using caged speract and a lighting system for a microscope newly developed with a power LED. We found that speract induces increases in curvature of swimming paths and changes flagellar bending shape to asymmetric. These facts show that speract directly regulates flagellar motility, and suggest that speract-induced increases in intracellular Ca2+ concentration play an actual role in regulation of the flagellar movement. (author abst.) |
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