ArticleThe Journal of cell biology1985
Acrosomal reaction of the Thyone sperm. III. The relationship between actin assembly and water influx during the extension of the acrosomal process.
Article in The Journal of cell biology, 1985. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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11 citing papers in PubMed, 49 citations in OpenAlex.
- Article
- Small changes in the regulation of one Arabidopsis profilin isovariant, PRF1, alter seedling development.The Plant cell · 2001Article
- How well can an amoeba climb?Proceedings of the National Academy of Sciences of the United States of America · 2000Article
- An analysis of actin delivery in the acrosomal process of thyone.Biophysical journal · 1999Article
- Actin binding proteins that change extent and rate of actin monomer-polymer distribution by different mechanisms.Molecular and cellular biochemistry · 1999Review
- In vitro models of tail contraction and cytoplasmic streaming in amoeboid cells.The Journal of cell biology · 1993Article
- Cellular motions and thermal fluctuations: the Brownian ratchet.Biophysical journal · 1993Article
- Relative distribution of actin, myosin I, and myosin II during the wound healing response of fibroblasts.The Journal of cell biology · 1993Article
- Host cell actin assembly is necessary and likely to provide the propulsive force for intracellular movement of Listeria monocytogenes.Infection and immunity · 1992Article
- Mechanics of fibroblast locomotion: quantitative analysis of forces and motions at the leading lamellas of fibroblasts.The Journal of cell biology · 1990Article
- Movement of the actin filament bundle in Mytilus sperm: a new mechanism is proposed.The Journal of cell biology · 1987Article
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Authors and funding
2 authors.
Funding
Abstract
In an attempt to investigate the role of water influx in the extension of the acrosomal process of Thyone sperm, we induced the acrosomal reaction in sea water whose osmolarity varied from 50 to 150% of that of sea water. (a) Video sequences of the elongation of the acrosomal processes were made; plots of the length of the acrosomal process as a function of (time)1/2 produced a straight line except at the beginning of elongation and at the end in both hypotonic and hypertonic sea water (up to 1.33 times the osmolarity of sea water), although the rate of elongation was fastest in hypotonic sea water and was progressively slower as the tonicity was raised. (b) Close examination of the video sequences revealed that regardless of the tonicity of the sea water, the morphology of the acrosomal processes were similar. (c) From thin sections of fixed sperm, the amount of actin polymerization that takes place is roughly coupled to the length of the acrosomal process formed so that sperm with short processes only polymerize a portion of the actin that must be present in those sperm. From these facts we conclude that the influx of water and the release of actin monomers from their storage form in the profilactin (so that these monomers can polymerize) are coupled. The exact role of water influx, why it occurs, and whether it could contribute to the extension of the acrosomal process by a hydrostatic pressure mechanism is discussed.
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