COX7A2L(细胞色素c氧化酶亚基7A2样蛋白)是线粒体电子传递链复合体IV(细胞色素c氧化酶)的一个调控亚基,属于COX7A基因家族。该基因家族成员主要参与线粒体呼吸链的组装和功能调节,共同特点是编码细胞色素c氧化酶的结构或调控亚基,对维持能量代谢至关重要。COX7A2L在心脏、骨骼肌等高耗能组织中表达较高,其核心功能是促进呼吸链超复合体的形成,优化电子传递效率从而提升ATP合成能力。研究发现该基因通过与COX1、COX4等亚基相互作用,稳定复合体IV的结构,并介导其与复合体III结合形成超复合体III2+IV。当COX7A2L发生突变时,会导致线粒体呼吸链功能异常,表现为ATP产量下降、活性氧累积,与 Leigh综合征、心肌病等线粒体疾病相关。该基因过表达可增强呼吸链超复合体组装,提高细胞氧化磷酸化能力,但过度激活可能引起氧化应激;而敲低表达则破坏超复合体稳定性,导致线粒体功能障碍,影响心肌和神经细胞等能量敏感组织。值得注意的是,COX7A2L在哺乳动物中存在两种剪接变体,其中长变体特异性参与超复合体组装,短变体功能尚未完全阐明。最新研究还发现该基因可能通过调节线粒体形态影响细胞凋亡过程,并与肿瘤代谢重编程存在潜在关联。
Cytochrome c oxidase (COX), the terminal component of the mitochondrial respiratory chain, catalyzes the electron transfer from reduced cytochrome c to oxygen. This component is a heteromeric complex consisting of 3 catalytic subunits encoded by mitochondrial genes and multiple structural subunits encoded by nuclear genes. The mitochondrially-encoded subunits function in electron transfer, and the nuclear-encoded subunits may function in the regulation and assembly of the complex. This nuclear gene encodes a protein similar to polypeptides 1 and 2 of subunit VIIa in the C-terminal region, and also highly similar to the mouse Sig81 protein sequence. This gene is expressed in all tissues, and upregulated in a breast cancer cell line after estrogen treatment. It is possible that this gene represents a regulatory subunit of COX and mediates the higher level of energy production in target cells by estrogen. [provided by RefSeq, Jul 2008]
色素c氧化酶(COX),线粒体呼吸链的末端部件,催化从还原细胞色素C来氧气的电子转移。该组件是由线粒体基因和核基因编码的多个结构亚基编码3催化亚基一个异复杂。线粒体的编码亚基功能的电子转移,以??及核编码亚基可以在复杂的调节和组装工作。此核基因编码相似的多肽1,并在C末端区域亚基VIIa因子2,并且还高度类似鼠标Sig81蛋白质??序列的蛋白质。该基因在所有组织中表达,并在雌激素治疗后,乳腺癌细胞系中上调。这可能是该基因代表COX的调节亚基和雌激素介导的靶细胞的能源生产的更高的水平。 [由RefSeq的,2008年7月提供]
COX7A2L基因(以及对应的蛋白质)的细胞分布位置:
COX7A2L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 |
Malignant neoplasm of prostate | 0.002367032 | 1 | 0 | GAD |
Precursor B-cell lymphoblastic leukemia | 0.000542884 | 2 | 0 | BeFree |
Precursor B-Cell Lymphoblastic Leukemia-Lymphoma | 0.000271442 | 1 | 0 | BeFree |
Adenomatous Polyposis Coli | 0.000271442 | 1 | 0 | BeFree |
Colorectal Cancer | 0.000271442 | 1 | 0 | BeFree |
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