Protein Domain : Ubiquinone biosynthesis protein Coq7 IPR011566

Type	Family
Description	Coq7 (also known as Clk-1 and CAT5) is a di-iron carboxylate protein occuring in both prokaryotes and eukaryotes that is essential for ubiquinone biosynthesis [ , ]. It has been implicated in the aging process as mutations in the Caenorhabditis elegans gene lead to increased lifespan []. Coq7 is a membrane-bound protein that functions as a monooxygenase to hydroxylate demethoxyubiquinone (DMQ or 2-methoxy-5-methyl-6-polyprenyl-1,4-benzoquinone) in the penultimate step of ubiquinone biosynthesis []. Biochemical studies indicate that NADH can serve directly as a reductant for catalytic activation of dioxygen and substrate oxidation by the enzyme, with no requirement for an additional reductase protein component []. This direct reaction with NADH is so far unique amongst members of the di-iron carboxylate protein family.
Short Name	Ubq_synth_Coq7