May be a specific regulator of miRNA biogenesis. Binds to microRNAs MIR7-1, MIR16-2 and MIR29A hairpins recognizing the 'ATA(A/T)' motif in the apical loop. (Microbial infection) Interacts (via LD motif) with rotavirus A NSP3 (via the coiled-coil region). Nuclear localization seems to be depleted upon rotavirus A infection.