Interaction of Filamin with F-actin in Solution

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 1977 May 1

PMID 325564

Citations 42

Authors

K Wang

S J Singer

Affiliations

Soon will be listed here.

Abstract

Filamin is a major high-molecular-weight protein in smooth muscle which was recently identified and isolated [Wang, K., Ash, J. F. & Singer, S. J. (1975) Proc. Natl. Acad. Sci. U.S.A. 72, 4483-4486]. In the present studies, we shown that highly purified chicken gizzard filamin and muscle F-actin react in solution to form aggregates containing both proteins. Occasionally, these aggregates coagulate and contract into a dense gel in the absence of MgATP or CaATP. Immunofluorescence and electron microscopic studies suggest that the F-actin filaments are collected into fiber bundles and a crosslinked fiber meshwork by the binding of filamin molecules. These studies suggest that the function of filamin intact cells may be to regulate the ultrastructural state of F-actin filaments in a variety of dynamic cellular processes.

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