NSUN4
Function
Involved in mitochondrial ribosome assembly. 5-methylcytosine rRNA methyltransferase that probably is involved in mitochondrial ribosome small subunit (SSU) maturation by methylation of mitochondrial 12S rRNA; the function is independent of MTERFD2/MTERF4 and assembled mitochondrial ribosome large subunit (LSU). Targeted to LSU by MTERFD2/MTERF4 and probably is involved in a final step in ribosome biogenesis to ensure that SSU and LSU are assembled. In vitro can methylate 16S rRNA of the LSU; the methylation is enhanced by MTERFD/MTERF4.
Sequence Similarities
Belongs to the class I-like SAM-binding methyltransferase superfamily. RsmB/NOP family.
Cellular localization
- Mitochondrion
Alternative names
5-methylcytosine rRNA methyltransferase NSUN4, 5-methylcytosine tRNA methyltransferase NSUN4, NOL1/NOP2/Sun domain family member 4, NSUN4