Issledovanie belkovogo kompleksa iz mozga, ponizhaiushchego viazkost' aktina. II. Kompleks ingibiruet élongatsiiu aktinovykh filamentov na predpochtitel'nom dlia polimerizatsii kontse i fragmentiruet filamenty.

Translated title of the contribution: Study of a protein complex from the brain which reduces actin viscosity. II. The complex inhibits elongation of actin filaments at the end preferable for polymerization and fragments the filaments

A. B. Verkhovskiǐ*, I. G. Surgucheva, V. I. Gel'fand

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Functional properties of the protein complex from bovine brain that shortens actin filaments are described. In the presence of Ca2+ complex shortens actin filaments and increases the initial rate of actin polymerization. In the absence of free calcium ions the complex loses its accelerating effect on actin polymerization, but still possesses actin filament shortening activity. Neither phalloidin nor tropomyosin prevent the shortening of actin filaments induced by the protein complex. Therefore the protein complex causes the fragmentation of actin filament. The data on actin polymerization in the presence of F-actin nuclei have indicated that the protein complex inhibits the elongation step of actin polymerization. The analysis of elongation in the presence of both the protein complex and cytochalasin D has demonstrated that the inhibition occurs on the fast-growing end of actin filaments.

Translated title of the contributionStudy of a protein complex from the brain which reduces actin viscosity. II. The complex inhibits elongation of actin filaments at the end preferable for polymerization and fragments the filaments
Original languageRussian
Pages (from-to)929-935
Number of pages7
JournalMolekuliarnaia biologiia
Volume20
Issue number4
StatePublished - Jul 1 1986

ASJC Scopus subject areas

  • Molecular Biology

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