细胞色素c氧化酶(cytochrome c oxidase,COX)是线粒体呼吸链的终端酶,位于线粒体内膜上,是呼吸链中唯一能够将氧还原成水的复合物。人体组织或细胞中90%的氧是通过COX催化处理后被利用的,COX在机体内的氧化代谢和ATP合成中起着重要作用...细胞色素c氧化酶(cytochrome c oxidase,COX)是线粒体呼吸链的终端酶,位于线粒体内膜上,是呼吸链中唯一能够将氧还原成水的复合物。人体组织或细胞中90%的氧是通过COX催化处理后被利用的,COX在机体内的氧化代谢和ATP合成中起着重要作用。研究发现,衰老及相关退行性疾病的发生均与COX活性减弱有关。本文从COX结构、亚基缺失、介导氧化损伤、与生物大分子结合等几个方面,综述COX对衰老等疾病的调控作用及相关机制,旨在为对预防或治疗老年性疾病提供参考。展开更多
The fluorescence quenching spectra of the holo-Cu A and apo-Cu A domain of cytochrome c oxidase from Para coccus versutus by KI were investigated.The results indicated that in solution part of the fluorophore tryptoph...The fluorescence quenching spectra of the holo-Cu A and apo-Cu A domain of cytochrome c oxidase from Para coccus versutus by KI were investigated.The results indicated that in solution part of the fluorophore tryptophanes of the Cu A domain are exposed to the surface of the protein,and others buried inside o f the hydrophobic core.The fluorescence quenching constants of holo-Cu A and apo-Cu A domain protein by KI are1.39and2.24,respectively,which suggested t hat the bi-nuclear copper center[Cu A+1.5 -Cu A+1.5 ]also plays a role on the structural stability of the protein.展开更多
文摘细胞色素c氧化酶(cytochrome c oxidase,COX)是线粒体呼吸链的终端酶,位于线粒体内膜上,是呼吸链中唯一能够将氧还原成水的复合物。人体组织或细胞中90%的氧是通过COX催化处理后被利用的,COX在机体内的氧化代谢和ATP合成中起着重要作用。研究发现,衰老及相关退行性疾病的发生均与COX活性减弱有关。本文从COX结构、亚基缺失、介导氧化损伤、与生物大分子结合等几个方面,综述COX对衰老等疾病的调控作用及相关机制,旨在为对预防或治疗老年性疾病提供参考。
文摘The fluorescence quenching spectra of the holo-Cu A and apo-Cu A domain of cytochrome c oxidase from Para coccus versutus by KI were investigated.The results indicated that in solution part of the fluorophore tryptophanes of the Cu A domain are exposed to the surface of the protein,and others buried inside o f the hydrophobic core.The fluorescence quenching constants of holo-Cu A and apo-Cu A domain protein by KI are1.39and2.24,respectively,which suggested t hat the bi-nuclear copper center[Cu A+1.5 -Cu A+1.5 ]also plays a role on the structural stability of the protein.
