Cytochrome C oxidase copper chaperone (COX17)
Cox17 is essential for the assembly of functional cytochrome c oxidase (CCO) and for delivery of copper ions to the mitochondrion for insertion into the enzyme in yeast. The structure of Cox17 shows the protein to have an unstructured N-terminal region followed by two helices and several unstructured C-terminal residues. The Cu(I) binding site has been modelled as two-coordinate with ligation by conserved residues Cys23 and Cys26.