Focal adhesion associated protein (FAAP), encoded by murine D10Wsu52e gene, is highly homologous to human HSPC117, which interacts with vinculin and talin. HeLa cells transfected with FAAP exhibited normal adhesion incorporation but showed impaired cell spreading, and restrained focal adhesion translocation. Moreover, FAAP facilitated vinculin-paxillin association, decreased interaction of paxillin-focal adhesion kinase and inhibited the phosphorylation of extracellular signal-regulated kinase. Together, these results suggest that FAAP, by virtue of modulating interaction of adhesion molecules, regulates cell adhesion dynamics.