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PMID:16461463

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Citation

Girard, KD, Kuo, SC and Robinson, DN (2006) Dictyostelium myosin II mechanochemistry promotes active behavior of the cortex on long time scales. Proc. Natl. Acad. Sci. U.S.A. 103:2103-8

Abstract

Cell cortices rearrange dynamically to complete cytokinesis, crawlin response to chemoattractant, build tissues, and make neuronal connections. Highly enriched in the cell cortex, actin, myosin II, and actin crosslinkers facilitate cortical movements. Because cortical behavior is the consequence of nanoscale biochemical events, it is essential to probe the cortex at this level. Here, we use high-resolution laser-based particle tracking to examine how myosin II mechanochemistry and dynacortin-mediated actin crosslinking control cortex dynamics in Dictyostelium. Consistent with its low duty ratio, myosin II does not directly drive active bead motility. Instead, myosin II and dynacortin antagonistically regulate other active processes in the living cortex.

Links

PubMed PMC1413706 Online version:10.1073/pnas.0508819103

Keywords

Animals; Biomechanics; Cell Movement; Dictyostelium/physiology; Myosin Type II/chemistry; Myosin Type II/physiology

Significance

Annotations

Gene product Qualifier GO ID GO term name Evidence Code with/from Aspect Notes Status


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References

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