COX4I1(细胞色素c氧化酶亚基4亚型1)是细胞色素c氧化酶(COX)复合物的一个关键亚基,属于线粒体电子传递链的第四复合物(复合物IV),负责将电子从细胞色素c传递给氧气并促进ATP合成。该基因编码的蛋白是COX的结构和功能核心,主要位于线粒体内膜,参与维持氧化磷酸化效率和能量代谢平衡。COX4I1的突变可能导致复合物IV组装或功能异常,引发线粒体疾病,如Leigh综合征(一种神经退行性疾病),表现为发育迟缓、肌无力及乳酸酸中毒。此外,COX4I1表达异常与癌症相关,其过表达可能通过增强线粒体呼吸支持肿瘤细胞增殖,而低表达则导致能量代谢障碍,影响高耗能组织(如心脏和大脑)。COX4I1属于COX4基因家族,该家族包括COX4I1和COX4I2两种亚型,共性在于均参与COX复合物的稳定性与活性调节,但COX4I1广泛表达,而COX4I2主要在肺和胎盘中特异性表达。研究表明,缺氧条件下COX4I1可能被COX4I2替代以优化氧利用效率。该基因的调控异常还可能影响活性氧(ROS)水平,进而关联衰老和神经退行性疾病。
Cytochrome c oxidase (COX) is the terminal enzyme of the mitochondrial respiratory chain. It is a multi-subunit enzyme complex that couples the transfer of electrons from cytochrome c to molecular oxygen and contributes to a proton electrochemical gradient across the inner mitochondrial membrane. The complex consists of 13 mitochondrial- and nuclear-encoded subunits. The mitochondrially-encoded subunits perform the electron transfer and proton pumping activities. The functions of the nuclear-encoded subunits are unknown but they may play a role in the regulation and assembly of the complex. This gene encodes the nuclear-encoded subunit IV isoform 1 of the human mitochondrial respiratory chain enzyme. It is located at the 3' of the NOC4 (neighbor of COX4) gene in a head-to-head orientation, and shares a promoter with it. [provided by RefSeq, Jul 2008]
细胞色素C氧化酶(COX)是线粒体呼吸链的终端酶。它是一种多亚基酶复合物耦合电子从色素c转移到分子氧并有助于跨线粒体内膜的质子电化学梯度。该建筑群包括13个mitochondrial-和核编码亚基。线粒体的编码亚基进行电子传递和质子泵活动。核编码的亚基的功能是未知的,但它们可能在复杂的调节和组装的作用。该基因编码的人类线粒体呼吸链酶的核编码亚基IV亚型1。它位于NOC4(COX4的邻居)基因在一个头 - 头方向的3‘,和共享的启动子与它。 [由RefSeq的,2008年7月提供]
COX4I1基因(以及对应的蛋白质)的细胞分布位置:
COX4I1基因的本体(GO)信息:
名称 |
---|
190 Oxidative phosphorylation [PATH:hsa00190] |
4260 Cardiac muscle contraction [PATH:hsa04260] |
5010 Alzheimer's disease [PATH:hsa05010] |
5012 Parkinson's disease [PATH:hsa05012] |
5016 Huntington's disease [PATH:hsa05016] |
4932 Non-alcoholic fatty liver disease (NAFLD) [PATH:hsa04932] |
名称 |
---|
Gene Expression |
Generic Transcription Pathway |
Metabolism |
Respiratory electron transport |
Respiratory electron transport, ATP synthesis by chemiosmotic coupling, and heat production by uncoupling proteins |
The citric acid (TCA) cycle and respiratory electron transport |
TP53 Regulates Metabolic Genes |
Transcriptional Regulation by TP53 |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Leprosy | 0.12 | 1 | 1 | GWASCAT |
Protein-Energy Malnutrition | 0.08 | 1 | 0 | RGD |
Obesity | 0.000814326 | 3 | 0 | BeFree |
Breast Carcinoma | 0.000271442 | 1 | 0 | BeFree |
HIV Infections | 0.000271442 | 1 | 0 | BeFree |
Myopathy | 0.000271442 | 1 | 0 | BeFree |
Cytochrome-c Oxidase Deficiency | 0.000271442 | 1 | 0 | BeFree |
Malignant neoplasm of breast | 0.000271442 | 1 | 0 | BeFree |
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