Morphology of actin assemblies in response to polycation and salts.

Abstract:

:F-actins are semi-flexible polyelectrolytes and can be assembled into a large polymer-actin complex with polymorphism through electrostatic interaction with polycations. This study investigates the structural phase behavior and the growth of polymer-actin complexes in terms of its longitudinal and lateral sizes in various polycation and KCl concentrations for a constant actin concentration. Our results show that the longitudinal growth and lateral growth of polymer-actin complexes, initiated by a common nucleation process, are dominated by different factors in subsequent growth process. This induces the structural polymorphism of polymer-actin complexes. Major factors to influence the polymorphism of polymer-actin complexes in polyelectrolyte systems have been discussed. Our results indicate that the semiflexible polyelectrolyte nature of F-actins is important for controlling the morphology and growth of actin architectures in cells.

journal_name

Biomacromolecules

journal_title

Biomacromolecules

authors

Kwon HJ,Kakugo A,Shikinaka K,Osada Y,Gong JP

doi

10.1021/bm050320g

keywords:

subject

Has Abstract

pub_date

2005-11-01 00:00:00

pages

3005-9

issue

6

eissn

1525-7797

issn

1526-4602

journal_volume

6

pub_type

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