Rice yellow stunt virus activates polyamine biosynthesis to promote viral propagation in insect vectors by disrupting ornithine decarboxylase antienzyme function.

Rice yellow stunt virus activates polyamine biosynthesis to promote viral propagation in insect vectors by disrupting ornithine decarboxylase antienzyme function.
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稻黄矮化病毒通过破坏鸟氨酸脱羧酶抗酶功能激活多胺生物合成以促进昆虫载体中病毒的繁殖

DOI:
10.1007/s11427-020-1846-8
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发表时间:
2021-09
期刊:
Science China. Life sciences
影响因子:
--
通讯作者:
Wei T
Wei T
中科院分区:
其他
文献类型:
--
作者:
Zhang XF;Zeng T;Xie Y;Zheng Y;Wang H;Lin H;Wang Z;Wei T

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细胞内多胺(腐胺,亚精胺,精胺)已成为病毒感染的重要分子,然而,病毒如何激活多胺的生物合成,以促进病毒感染仍不清楚。鸟氨酸脱羧酶1(ODC 1)及其抗酶1(OAZ 1)是动物细胞中多胺生物合成的主要调节因子。在这里,我们报告水稻黄矮病毒(RYSV),一种植物弹状病毒,可以激活腐胺的生物合成在叶蝉促进病毒繁殖,通过抑制OAZ 1的表达。我们观察到,减少腐胺的生物合成的处理与二氟甲基鸟氨酸(DFMO),一个特定的无毒抑制剂的ODC 1,或在体外合成的双链RNA靶向ODC 1 mRNA可以抑制病毒感染。相反,腐胺的补充或通过用靶向OAZ 1 mRNA的dsRNA处理来增加腐胺的生物合成可以促进病毒感染。我们进一步确定RYSV基质蛋白M和ODC 1都直接结合OAZ 1 C末端的ODC结合结构域。因此,叶蝉中的病毒繁殖将降低OAZ 1靶向和介导ODC 1降解的能力,ODC 1最终激活腐胺产生以利于病毒繁殖。这项工作表明,多胺代谢酶直接利用媒介传播的病毒,以增加多胺的生产,从而促进病毒感染昆虫载体。支持信息可在线获取,电话:10.1007/s11427-020-1846-8。支持材料按提交的内容发布,不进行排版或编辑。科学准确性和内容的责任完全由作者承担。
Intracellular polyamines (putrescine, spermidine, and spermine) have emerged as important molecules for viral infection; however, how viruses activate polyamines biosynthesis to promote viral infection remains unclear. Ornithine decarboxylase 1 (ODC1) and its antienzyme 1 (OAZ1) are major regulators of polyamine biosynthesis in animal cells. Here, we report that rice yellow stunt virus (RYSV), a plant rhabdovirus, could activate putrescine biosynthesis in leafhoppers to promote viral propagation by inhibiting OAZ1 expression. We observed that the reduction of putrescine biosynthesis by treatment with difluormethylornithine (DFMO), a specific nontoxic inhibitor of ODC1, or with in vitro synthesized dsRNAs targeting ODC1 mRNA could inhibit viral infection. In contrast, the supplement of putrescine or the increase of putrescine biosynthesis by treatment with dsRNAs targeting OAZ1 mRNA could facilitate viral infection. We further determined that both RYSV matrix protein M and ODC1 directly bind to the ODC-binding domain at the C-terminus of OAZ1. Thus, viral propagation in leafhoppers would decrease the ability of OAZ1 to target and mediate the degradation of ODC1, which finally activates putrescine production to benefit viral propagation. This work reveals that polyamine-metabolizing enzymes are directly exploited by a vector-borne virus to increase polyamine production, thereby facilitating viral infection in insect vectors. The supporting information is available online at 10.1007/s11427-020-1846-8. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors.
小麦黄纹病毒的鉴定和特征,一种新型叶蝉传播的核弹状病毒感染小麦。
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