Chromosome 6 open reading frame 203 is a protein that in humans is encoded by the C6orf203gene.
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C6orf203 protein is reported to be localised to the mitochondria of eukaryotes and possess an evolutionarily conserved RNA-binding domain.[6][7]
One study propose C6orf203 to associate with mitochondrial RNA polymerase (POLRMT) and increase mitochondrial transcription to protect the cell from mitochondrial RNA loss during stress.[7] However, another study propose C6orf203 to associate with the mitoribosomal large subunit and regulate mitochondrial translation.[6]