| Modification Notes |
Mammalian mitochondrial ribosomes (mitoribosomes) are responsible for protein synthesis within the mitochondrion. The mitoribosomes are composed of a 4:1 ratio of protein to RNA, with the proteins forming two subunits, the 28S subunit and the 39S subunit. Across species, the proteins that make up the mitoribosome subunits vary greatly in sequence, preventing easy recognition by sequence homology. MRP-L3 (mitochondrial 39S ribosomal protein L3), also known as L3mt, is a 348 amino acid protein belonging to the ribosomal protein L3P family. Localized to mitochondria, MRP-L3 is present in the 39S subunit of the mitoribosomes. |