Synonyms:40S ribosomal protein S3, ribosomal protein S3, RPS3 Background:40S ribosomal protein S3 (RPS3), also named as SW-cl.26, is a 243 amino acid protein,which contains one KH type-2 domain and belongs to the ribosomal protein S3P family. RPS3 localizes in the cytoplasm. RPS3 is identified in a IGF2BP1-dependent mRNP granule complex, which contains untranslated mRNAs. RPS3 plays a role in repairing various DNA damage acting as a repair UV endonuclease. Nuclear accumulation of RPS3 results in an increase in DNA repair activity to some extent, thereby sustaining neuronal survival. The calculated molecular weight of RPS3 is 26 kDa, but the modified RPS3 is about 33 kDa.