Enables ribosomal large subunit binding activity. Involved in regulation of translation. Acts upstream of or within production of miRNAs involved in gene silencing by miRNA; response to cold; and translation. Predicted to be located in cytoplasm; dendrite; and nucleoplasm. Predicted to be part of spliceosomal complex. Is expressed in several structures, including central nervous system; ovary; and sensory organ. Orthologous to human RBM3 (RNA binding motif protein 3). [provided by Alliance of Genome Resources, Apr 2022]