Cytoskeletal cross-linking and bundling in motor-independent contraction

Sean X. Sun, Sam Walcott, Charles William Wolgemuth

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Eukaryotic and prokaryotic cells use cytoskeletal proteins to regulate and modify cell shape. During cytokinesis or eukaryotic cell crawling, contractile forces are generated inside the cell to constrict the division site or to haul the rear of the cell forward, respectively. In many cases, these forces have been attributed to the activity of molecular motors, such as myosin II, which, by pulling on actin filaments, can produce contraction of the actin cytoskeleton. However, prokaryotic division is driven by the tubulin-like protein FtsZ and does not seem to require additional molecular motors to constrict the division site. Likewise, Dictyostelium discoideum and Saccharomyces cerevisiae can perform cytokinesis under motor-free conditions. In addition, many crawling cells can translocate when myosin is inhibited or absent. In this review, we point out another force-generation mechanism that can play a significant role in driving these processes in eukaryotes and prokaryotes. This mechanism is mediated by cross-linking and bundling proteins that form effective interactions between cytoskeletal filaments. Some recent studies in this area are reviewed and the physical underpinnings of this force-generation mechanism are explained.

Original languageEnglish (US)
JournalCurrent Biology
Volume20
Issue number15
DOIs
StatePublished - Aug 10 2010
Externally publishedYes

Fingerprint

crosslinking
Cytokinesis
Eukaryotic Cells
Actin Cytoskeleton
eukaryotic cells
Actins
cytokinesis
myosin
prokaryotic cells
microfilaments
Prokaryotic Cells
Myosin Type II
Dictyostelium
Cytoskeletal Proteins
Cell Shape
cells
Myosins
Tubulin
Eukaryota
Cytoskeleton

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Cytoskeletal cross-linking and bundling in motor-independent contraction. / Sun, Sean X.; Walcott, Sam; Wolgemuth, Charles William.

In: Current Biology, Vol. 20, No. 15, 10.08.2010.

Research output: Contribution to journalArticle

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