Adenovirus E4ORF1-induced MYC activation promotes host cell anabolic glucose metabolism and virus replication.

Adenovirus E4ORF1-induced MYC activation promotes host cell anabolic glucose metabolism and virus replication.
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DOI:
10.1016/j.cmet.2014.03.009
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发表时间:
2014-04-01
期刊:
影响因子:
29
通讯作者:
Christofk HR
Christofk HR
中科院分区:
生物学1区
文献类型:
--
作者:
Thai M;Graham NA;Braas D;Nehil M;Komisopoulou E;Kurdistani SK;McCormick F;Graeber TG;Christofk HR

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病毒感染触发宿主细胞的代谢变化,支持病毒复制的生物能量和生物合成需求。虽然最近的研究已经描述了病毒诱导的宿主细胞代谢变化,但病毒重编程细胞代谢的分子机制仍然难以捉摸。本研究表明,腺病毒E4ORF1基因产物是腺病毒诱导的宿主细胞糖代谢上调所必需的,并且足以通过激活MYC促进培养上皮细胞的糖酵解。E4ORF1定位于细胞核,与MYC结合,并增强MYC与糖酵解靶基因的结合,导致特异性糖酵解酶的表达升高。MYC的E4ORF1激活促进葡萄糖中间体核苷酸生物合成的增加,并使腺病毒在原代肺上皮细胞中进行最佳复制。我们的研究结果显示了病毒蛋白如何利用宿主细胞机制来重新编程细胞代谢并促进最佳子代病毒粒子的产生。
Virus infections trigger metabolic changes in host cells that support the bioenergetic and biosynthetic demands of viral replication. While recent studies have characterized virus-induced changes in host cell metabolism, the molecular mechanisms by which viruses reprogram cellular metabolism have remained elusive. Here we show that the gene product of adenovirus E4ORF1 is necessary for adenovirus-induced upregulation of host cell glucose metabolism and sufficient to promote enhanced glycolysis in cultured epithelial cells by activation of MYC. E4ORF1 localizes to the nucleus, binds to MYC, and enhances MYC binding to glycolytic target genes, resulting in elevated expression of specific glycolytic enzymes. E4ORF1 activation of MYC promotes increased nucleotide biosynthesis from glucose intermediates and enables optimal adenovirus replication in primary lung epithelial cells. Our findings show how a viral protein exploits host cell machinery to reprogram cellular metabolism and promote optimal progeny virion generation.
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