Genome-wide analysis and proteomic studies reveal APE1/Ref-1 multifunctional role in mammalian cells.

Genome-wide analysis and proteomic studies reveal APE1/Ref-1 multifunctional role in mammalian cells.
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DOI:
10.1002/pmic.200800638
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发表时间:
2009-02
期刊:
影响因子:
3.4
通讯作者:
Tell G
Tell G
中科院分区:
生物学3区
文献类型:
--
作者:
Vascotto C;Cesaratto L;Zeef LA;Deganuto M;D'Ambrosio C;Scaloni A;Romanello M;Damante G;Taglialatela G;Delneri D;Kelley MR;Mitra S;Quadrifoglio F;Tell G

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APE1/Ref-1通过在DNA损伤的碱基切除修复途径中发挥中心酶的作用,并通过其作为氧化还原转录共激活因子的独立活性来保护细胞免受氧化应激的影响。这种蛋白的失调与癌症的发生有关。目前,关于这两种功能的生物学相关性以及涉及的分子机制的对比数据已经公布。在这里,我们结合了mRNA表达谱和蛋白质组分析来确定与siRNA技术诱导的APE1表达缺失相关的分子变化。这一方法确定了APE1在细胞生长、细胞凋亡、细胞内氧化还原状态、线粒体功能和细胞骨架结构中的作用。因此,总体而言,我们的数据表明,APE1在协调哺乳动物细胞中不同的重要功能方面发挥了枢纽的作用,突出了APE1蛋白多功能的分子决定因素。
APE1/Ref-1 protects cells from oxidative stress by acting as a central enzyme in base excision repair pathways of DNA lesions and through its independent activity as a redox transcriptional co-activator. Dysregulation of this protein has been associated to cancer development. At present, contrasting data have been published regarding the biological relevance of the two functions as well as the molecular mechanisms involved. Here, we combined both mRNA expression profiling and proteomic analysis to determine the molecular changes associated with APE1 loss-of-expression induced by siRNA technology. This approach identified a role of APE1 in cell growth, apoptosis, intracellular redox state, mitochondrial function and cytoskeletal structure. Thus, overall, our data show that APE1 acts as a hub in coordinating different and vital functions in mammalian cells, highlighting the molecular determinants of the multifunctional nature of APE1 protein.
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