| Calcium-induced asymmetrical beating of triton-demembranated sea urchin sperm flagella. | |
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MedLine Citation:
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PMID: 479307 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Asymmetrical bending waves can be obtained by reactivating demembranated sea urchin spermatozoa at high Ca2+ concentrations. Moving-film flash photography shows that asymmetrical flagellar bending waves are associated with premature termination of the growth of the bends in one direction (the reverse bends) while the bends in the opposite direction (the principal bends) grow for one full beat cycle, and with unequal rates of growth of principal and reverse bends. The relative proportions of these two components of asymmetry are highly variable. The increased angle in the principal bend is compensated by a decreased angle in the reverse bend, so that there is no change in mean bend angle; the wavelength and beat frequency are also independent of the degree of asymmetry. This new information is still insufficient to identify a particular mechanism for Ca2+-induced asymmetry. When a developing bend stops growing before initiation of growth of a new bend in the same direction, a modification of the sliding between tubules in the distal portion of the flagellum is required. This modification can be described as a superposition of synchronous sliding on the metachronous sliding associated with propagating bending waves. Synchronous sliding is particularly evident in highly asymmetrical flagella, but is probably not the cause of asymmetry. The control of metachronous sliding appears to be unaffected by the superposition of synchronous sliding. |
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Authors:
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C J Brokaw |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of cell biology Volume: 82 ISSN: 0021-9525 ISO Abbreviation: J. Cell Biol. Publication Date: 1979 Aug |
Date Detail:
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Created Date: 1979-11-21 Completed Date: 1979-11-21 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 0375356 Medline TA: J Cell Biol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 401-11 Citation Subset: IM |
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Calcium / pharmacology* Cell Membrane / drug effects Male Models, Biological Polyethylene Glycols / pharmacology Sea Urchins Sperm Motility / drug effects Sperm Tail / drug effects, physiology Spermatozoa / drug effects*, physiology |
| Chemical | |
Reg. No./Substance:
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0/Polyethylene Glycols; 7440-70-2/Calcium |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
| Full Text | |
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Journal Information Journal ID (nlm-ta): J Cell Biol ISSN: 0021-9525 ISSN: 1540-8140 Publisher: The Rockefeller University Press |
Article Information Download PDF  Print publication date: Day: 1 Month: 8 Year: 1979 Volume: 82 Issue: 2 First Page: 401 Last Page: 411 ID: 2110463 Publisher Id: 80006820 PubMed Id: 479307 |
| Calcium-induced asymmetrical beating of triton-demembranated sea urchin sperm flagella | |
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