Predicted to enable identical protein binding activity. Predicted to contribute to small GTPase binding activity. Predicted to be involved in several processes, including Rac protein signal transduction; positive regulation of cellular component organization; and regulation of actin polymerization or depolymerization. Predicted to act upstream of or within actin cytoskeleton organization; in utero embryonic development; and positive regulation of cell population proliferation. Predicted to be located in lamellipodium. Predicted to be part of SCAR complex. Orthologous to human BRK1 (BRICK1 subunit of SCAR/WAVE actin nucleating complex). [provided by Alliance of Genome Resources, Apr 2022]