Enables ribosome binding activity. Involved in mitochondrial respiratory chain complex III assembly and positive regulation of mitochondrial translation. Located in mitochondrial ribosome. Part of Cbp3p-Cbp6 complex.
SGD Description
Mitochondrial protein required for translation of the COB mRNA; forms a complex with Cbp3p that binds to mt ribosomes near the polypeptide tunnel exit and promotes efficient translation of the COB mRNA; Cbp3p-Cbp6p complex also interacts with newly synthesized cytochrome b (Cobp) and Cbp4p to promote assembly of Cobp into the cytochrome bc1 complex; Cbp3p-Cbp6p complex is sequestered if assembly of Complex III is blocked, downregulating COB mRNA translation