Cytochrome C Oxidase - Assembly

Assembly

Site of assembly is believed to occur near TOM/TIM, where complex intermediates are accessible to bind with subunits imported from cytosol. Hemes and cofactors are inserted into subunits I & II Subunits I and IV initiate assembly. Other subunits may form sub-complex intermediates that later bind to others to form COX complex. In post-assembly modifications, the enzyme is dimerized, which is required for active/efficient enzyme action. Dimers are connected by a cardiolipin molecule.

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