May regulate actin cytoskeletal organization, cell spreading and cell contraction by directly binding and stabilizing filamentous F-actin. The localized formation of TARA and TRIO complexes coordinates the amount of F-actin present in stress fibers. May also serve as a linker protein to recruit proteins required for F-actin formation and turnover. Binds to TRIO and F-actin (By similarity). May also interact with myosin II (By similarity). Interacts with HECTD3 (By similarity). Interacts with PJVK (PubMed:28209736). Localized to F-actin in a periodic pattern. Centrosomal localization occurs upon phosphorylation by PLK1 at Thr-445 and lasts from prophase to anaphase. At telophase, relocalizes to midbody (By similarity). Contains at least 2 actin-binding sites per coiled-coil dimer. Ubiquitinated by HECTD3, leading to its degradation by the proteasome. Phosphorylation at Thr-445 by PLK1 ensures mitotic progression and is essential for accurate chromosome segregation.