Enables endoribonuclease activity; mRNA binding activity; and miRNA binding activity. Involved in regulation of gene expression. Acts upstream of or within RNA metabolic process; positive regulation of gene expression; and post-embryonic development. Located in several cellular components, including P-body; cytosol; and dendrite. Part of RISC complex and RISC-loading complex. Is expressed in several structures, including central nervous system; early embryo; lung; sensory organ; and tooth. Orthologous to human AGO2 (argonaute RISC catalytic component 2). [provided by Alliance of Genome Resources, Apr 2022]