Functional roles of VASP phosphorylation in the regulation of chemotaxis and osmotic stress response.

Journal Article

Vasodilator-stimulated phosphoprotein (VASP) plays crucial roles in controlling F-actin-driven processes and growing evidence indicates that VASP function is modulated by phosphorylation at multiple sites. However, the complexity of mammalian system prevents the clear understanding of the role of VASP phosphorylation. In this study, we took advantage of Dictyostelium which possesses only one member of the Ena/VASP family to investigate the functional roles of VASP phosphorylation. Our results demonstrated that hyperosmotic stress and cAMP stimulation cause VASP phosphorylation. VASP phosphorylation plays a negative role for the early steps of filopodia/microspikes formation. VASP phosphorylation appears to modulate VASP localization at the membrane cortex and its interactions with WASP and WIPa. Analysis of chemotaxis of cells expressing VASP mutants showed that VASP phosphorylation is required for the establishment of cell polarity under a cAMP gradient.

Full Text

Duke Authors

Cited Authors

  • Lin, W-H; Nelson, SE; Hollingsworth, RJ; Chung, CY

Published Date

  • April 2010

Published In

Volume / Issue

  • 67 / 4

Start / End Page

  • 259 - 271

PubMed ID

  • 20191567

Pubmed Central ID

  • 20191567

Electronic International Standard Serial Number (EISSN)

  • 1949-3592

International Standard Serial Number (ISSN)

  • 1949-3584

Digital Object Identifier (DOI)

  • 10.1002/cm.20443

Language

  • eng