Ameboid movement

Bhowmick, D.K. (1967). Electron microscopy of Trichamoeba villosa and ameboid movement. Exp. Cell Res. 45, 570-589. 

Ameboid movements of protozoa and of cells from higher organisms, the ruffling movements of cell membranes, phagocystosis, and the cytoplasmic streaming characteristic of many plant cells2893 have all been traced to actin filaments or actin cables rather... 

Bacteria also contain filamentous proteins that resemble F-actin and which may be utilized for cell-shape determination 301c Actin-based motility is used by some bacteria and other pathogens during invasion of host cells (Box 19-C). It is employed by sperm cells of Ascaris and of C. elegans, which crawl by an ameboid movement that utilizes treadmilling of filaments formed from a motile sperm protein, which does not... 

Microfilaments, which are small (5-7 nm in diameter) fibers composed of the protein actin, perform their functions by interacting with certain cross-linking proteins. Important roles of microfilaments include involvement in cytoplasmic streaming (a process that is most easily observed in plant cells in which cytoplasmic currents rapidly displace organelles such as chloroplasts) and ameboid movement (a type of locomotion created by the formation of temporary cytoplasmic protrusions). 

Facilitation of coherent cellular movement. Large-scale cellular movement such as the cytoplasmic streaming that occurs in plant cells and the ameboid movement seen in some animal cells is made possible by a dynamic cytoskeleton that can rapidly assemble and disassemble its structural elements according to the cell s immediate needs. 

Movement. Proteins are involved in all cell movements. For example, actin, tubulin, and other proteins comprise the cytoskeleton. Cytoskeletal proteins are active in cell division, endocytosis, exocytosis, and the ameboid movement of white blood cells. 

Ameboid Movement Entails Reversible Gel-Sol Transitions of Actin Networks... 

Yumura, S., Mori, H., and Fukui, Y. (1984) Localization of actin and myosin for the study of ameboid movement in Dictyostelium using improved immunofluorescence. /. Cell Biol. 99,894-899... 

Microfilaments - smallest of the three, they are made of actin and small amounts of myosin (like in muscle tissue). They function in cell movement like cytoplasmic streaming, endocytosis, and ameboid movement. This structure pinches the two cells apart after cell division, forming two new cells. 

Nuccitelli, R. Poo, M.M. Jaffe, L.E Relations between ameboid movement and membrane-controlled electrical currents. J. Gen. Physiol. 1977, 69, 743—763. 

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