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NATURE:你知道吗?人类基因组自带抗病毒核糖核苷酸

2018-06-23 海北 MedSci原创

至今为止,病毒感染仍然是公共卫生面临的主要挑战,增强对病毒生命周期过程的机理理解对于开发新的治疗策略是必要的。

至今为止,病毒感染仍然是公共卫生面临的主要挑战,增强对病毒生命周期过程的机理理解对于开发新的治疗策略是必要的。
Viperin是S-adenosyl-L-methionine(SAM)超家族酶的成员,它是一种干扰素诱导蛋白,涉及抑制各种RNA和DNA病毒的复制,包括登革热病毒,西尼罗河病毒,丙型肝炎病毒,甲型流感病毒,狂犬病病毒2和HIV。人们猜想,Viperin可能是通过与大量功能不相关的宿主和病毒蛋白相互作用来引发这些广泛的抗病毒活性。
最近,研究人员发现,viperin催化三磷酸胞苷(CTP)转化为3'-脱氧-3',4'-二脱氢-CTP(ddhCTP),一种以前未描述的生物相关分子,通过SAM依赖的机制。研究人员表明,表达viperin的哺乳动物细胞,以及受到IFNa刺激的巨噬细胞都能够产生大量的ddhCTP。研究人员还确定ddhCTP能够充当来自黄病毒属多个成员的RNA依赖性RNA聚合酶的链终止子,并且表明ddhCTP在体内直接抑制寨卡病毒的复制。
这些发现表明,viperin的广泛抗病毒作用的部分统一机制是基于蛋白质的内在酶性质,并涉及哺乳动物基因组编码的天然存在的复制链终止子的产生。

原始出处:
Gizzi AS et al. A naturally occurring antiviral ribonucleotide encoded by the human genome. NATURE, 2018; DOI: 10.1038/s41586-018-0238-4

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    2019-03-27 liye789132251
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    2018-07-16 xsm918
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    2018-06-24 yahu
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    2018-06-23 龙胆草

    学习谢谢分享

    0

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    2018-06-23 1209e435m98(暂无昵称)

    学习了.谢谢分享

    0

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    2018-06-23 lietome2

    好文.值得点赞!认真学习.应用于实践!谢谢分享给广大同好!

    0

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