Enables Arp2/3 complex binding activity and cytoskeletal protein binding activity. Involved in several processes, including cellular response to platelet-derived growth factor stimulus; negative regulation of lamellipodium morphogenesis; and negative regulation of smooth muscle cell chemotaxis. Located in several cellular components, including lamellipodium; perinuclear region of cytoplasm; and stress fiber. Orthologous to human CORO1B (coronin 1B). [provided by Alliance of Genome Resources, Apr 2022]