hydroxylase / complex / lipid / enzyme / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
3-demethoxyubiquinol 3-hydroxylase / 3-demethoxyubiquinol 3-hydroxylase activity / Ubiquinol biosynthesis / extrinsic component of mitochondrial inner membrane / ubiquinone biosynthesis complex / oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, NAD(P)H as one donor, and incorporation of one atom of oxygen / ubiquinone biosynthetic process / regulation of reactive oxygen species metabolic process / mitochondrial electron transport, NADH to ubiquinone / determination of adult lifespan ...3-demethoxyubiquinol 3-hydroxylase / 3-demethoxyubiquinol 3-hydroxylase activity / Ubiquinol biosynthesis / extrinsic component of mitochondrial inner membrane / ubiquinone biosynthesis complex / oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, NAD(P)H as one donor, and incorporation of one atom of oxygen / ubiquinone biosynthetic process / regulation of reactive oxygen species metabolic process / mitochondrial electron transport, NADH to ubiquinone / determination of adult lifespan / chromosome / regulation of gene expression / mitochondrial inner membrane / lipid binding / chromatin binding / negative regulation of transcription by RNA polymerase II / protein homodimerization activity / positive regulation of transcription by RNA polymerase II / mitochondrion / nucleus / metal ion binding 類似検索 - 分子機能
Ubiquinone biosynthesis protein Coq7 / Ubiquinone biosynthesis protein COQ9 / : / Ubiquinone biosynthesis protein COQ7 / Ubiquinone biosynthesis protein COQ9, N-terminal domain / COQ9 / COQ9 / Ferritin-like superfamily 類似検索 - ドメイン・相同性
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
5R01GM127673-04
米国
引用
ジャーナル: Mol Cell / 年: 2022 タイトル: Structure and functionality of a multimeric human COQ7:COQ9 complex. 著者: Mateusz Manicki / Halil Aydin / Luciano A Abriata / Katherine A Overmyer / Rachel M Guerra / Joshua J Coon / Matteo Dal Peraro / Adam Frost / David J Pagliarini / 要旨: Coenzyme Q (CoQ) is a redox-active lipid essential for core metabolic pathways and antioxidant defense. CoQ is synthesized upon the mitochondrial inner membrane by an ill-defined "complex Q" ...Coenzyme Q (CoQ) is a redox-active lipid essential for core metabolic pathways and antioxidant defense. CoQ is synthesized upon the mitochondrial inner membrane by an ill-defined "complex Q" metabolon. Here, we present structure-function analyses of a lipid-, substrate-, and NADH-bound complex comprising two complex Q subunits: the hydroxylase COQ7 and the lipid-binding protein COQ9. We reveal that COQ7 adopts a ferritin-like fold with a hydrophobic channel whose substrate-binding capacity is enhanced by COQ9. Using molecular dynamics, we further show that two COQ7:COQ9 heterodimers form a curved tetramer that deforms the membrane, potentially opening a pathway for the CoQ intermediates to translocate from the bilayer to the proteins' lipid-binding sites. Two such tetramers assemble into a soluble octamer with a pseudo-bilayer of lipids captured within. Together, these observations indicate that COQ7 and COQ9 cooperate to access hydrophobic precursors within the membrane and coordinate subsequent synthesis steps toward producing CoQ.