Figure 1

Eps8 induced actin remodeling in cultured cells. Phalloidin staining of the actin cytoskeleton in untransfected (A) B16F1, (B) MDA-MB231, and (C) MDA-MB231BO cells. Cells possess few filopodia-like structures extending from lateral and dorsal surfaces and do not possess cytoplasmic actin cables. Actin structures induced by Eps8 in (D-I) B16F1, (J-L) MDA-MB231, and (M-O) MDA-MB231BO cells. Distribution of Eps8-myc (D,G,J,M) revealed by 9e10 anti-c-myc antibody and actin (E,H,K,N) revealed by phalloidin staining in fixed cells. Right column (F,I,L,O) shows merged images with Eps8-myc in red and actin in green. The boxed region in (F) is enlarged in the inset. Eps8 induces the formation of filopodia-like structures in B16F1 and MDA-MB231 cells and localizes to filopodia-like structures, ruffles, and actin cables in MDA-MB231BO cells. In B16F1 cells, Eps8 localizes along the length of the filopodia-like structures (arrowheads in G-I) and is enriched at their tips (arrowheads, inset in F). Scale bar is equal to 10 μm in (A-F) and (J-O) and 5 μm in (G-I).