Enables DNA-(apurinic or apyrimidinic site) endonuclease activity. Involved in positive regulation of NF-kappaB transcription factor activity and positive regulation of protein-containing complex assembly. Located in cytoplasm. Is active in synapse. Is expressed in metanephros and pancreas epithelium. Orthologous to human RPS3 (ribosomal protein S3). [provided by Alliance of Genome Resources, Apr 2022]