Polarity patterns of stress fibers

N. Yoshinaga, J. F. Joanny, J. Prost, P. Marcq

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Stress fibers are contractile actomyosin bundles commonly observed in the cytoskeleton of metazoan cells. The spatial profile of the polarity of actin filaments inside contractile actomyosin bundles is either monotonic (graded) or periodic (alternating). In the framework of linear irreversible thermodynamics, we write the constitutive equations for a polar, active, elastic one-dimensional medium. An analysis of the resulting equations for the dynamics of polarity shows that the transition from graded to alternating polarity patterns is a nonequilibrium Lifshitz point. Active contractility is a necessary condition for the emergence of sarcomeric, alternating polarity patterns.

Original languageEnglish
Article number238103
JournalPhysical review letters
Volume105
Issue number23
DOIs
Publication statusPublished - 2010 Dec 2
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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