NSUN4 is a 5-methylcytosine rRNA methytransferase that is involved in mitochondiral ribosome assembly. More specifically NSUN4 is involved in mitochondrial ribosome small subunit (SSU) maturation by methylation of mitochondrial 12S rRNA. This function is independent of MTREFD2/MTERF4 and assembled mitochondrial ribosome large subunit (LSU). NSUN4 is targeted to LSU by MTREFD2/MTERF4 and is involved in the final step in ribosome biogenesis to ensure that SSU and LSU are assembled.
5-methylcytosine rRNA methyltransferase NSUN4; NOL1/NOP2/Sun domain family member 4; NOP2/Sun domain family, member 4; putative methyltransferase NSUN4; RP4-603I14.2; sperm head and tail associated protein