Research Article

Arginylation of ß-Actin Regulates Actin Cytoskeleton and Cell Motility

Science  14 Jul 2006:
Vol. 313, Issue 5784, pp. 192-196
DOI: 10.1126/science.1129344

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Abstract

Posttranslational arginylation is critical for mouse embryogenesis, cardiovascular development, and angiogenesis, but its molecular effects and the identity of proteins arginylated in vivo are unknown. We found that β-actin was arginylated in vivo to regulate actin filament properties, β-actin localization, and lamella formation in motile cells. Arginylation of β-actin apparently represents a critical step in the actin N-terminal processing needed for actin functioning in vivo. Thus, posttranslational arginylation of a single protein target can regulate its intracellular function, inducing global changes on the cellular level, and may contribute to cardiovascular development and angiogenesis.

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