RNA-binding protein involved in post-transcriptional regulation. Predominantly binds to mRNAs encoding mitochondrial proteins and localizes them to the vicinity of mitochondria for translation. Regulates mitochondrial biogenesis, motility and morphology (By similarity). Localizes to multiple discrete foci in the cytoplasm. By stress. Present with 846 molecules/cell in log phase SD medium. Belongs to the PUF3 family.