Involved in organellar RNA editing. Required for the processing of few RNA editing sites in mitochondria. Homodimer and heterodimers with MORF8/RIP1, MORF3/RIP3, MORF6/RIP6, MORF7/RIP7 and MORF9/RIP9. Dual targeting to mitochondria and chloroplasts. No visible phenotype under normal growth conditions. Belongs to the MORF family.