✦ LIBER ✦

Plasma membrane-microfilament interaction in animal cells

✍ Scribed by Kermit L. Carraway; Coralie A. Carothers Carraway

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 550 KB
Volume: 1
Category: Article
ISSN: 0265-9247
DOI: 10.1002/bies.950010204

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✦ Synopsis

Microfilament interactions with the plasma membranes of animal cells appear to vary with cell type and localization. In the erythrocyte, actin oligomers are associatedwith the membrane via spectrin and ankyrin. The ends of stress fibers in cultured cells, such as jibroblasts, are attached to the plasma membrane at focal adhesion sites and may involve the protein vinculin as a linking protein. In intestinal brush border microvilli a 110,000 dalton protein links the microfilament bundles to sites on the microvillus. A transmembrane complex containing actin stably associated with a cell surface glycoprotein can be isolated from ascites tumor cell microvilli and can be obtained still associated with microfilaments by gentle extraction and gradient centrifugation of the microvilli. These varied interaction mechanisms are believed to be needed to satisfy the different structural and dynamic requirements of the particular systems.

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