Polyamine-metabolizing enzymes are activated to promote the proper assembly of rice stripe mosaic virus in insect vectors  

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作  者:Dongsheng Jia Huan Liu Jian Zhang Wenqiang Wan Zongwen Wang Xiaofeng Zhang Qian Chen Taiyun Wei 

机构地区:[1]Fujian Province Key Laboratory of Plant Virology,State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops,Fujian Agriculture and Forestry University,Fuzhou,Fujian,People’s Republic of China

出  处:《Stress Biology》2022年第1期566-579,共14页逆境生物学(英文)

基  金:supported by funds from the National Natural Science Foundation of China to Taiyun Wei under grant number 31920103014;the National Natural Science Foundation of China to Dongsheng Jia under grant number 31970160;the National Natural Science Foundation of China to Xiaofeng Zhang under grant number 31871931;the Natural Science Foundation of Fujian Province to Dongsheng Jia under grant number 2020 J06015.

摘  要:Both viruses and host cells compete for intracellular polyamines for efficient propagation.Currently,how the key polyamine-metabolizing enzymes,including ornithine decarboxylase 1(ODC1)and its antizyme 1(OAZ1),are activated to co-ordinate viral propagation and polyamine biosynthesis remains unknown.Here,we report that the matrix protein of rice stripe mosaic virus(RSMV),a cytorhabdovirus,directly hijacks OAZ1 to ensure the proper assembly of rigid bacilliform non-enveloped virions in leafhopper vector.Viral matrix protein effectively competes with ODC1 to bind to OAZ1,and thus,the ability of OAZ1 to target and mediate the degradation of ODC1 is significantly inhibited during viral propagation,which finally promotes polyamines production.Thus,OAZ1 and ODC1 are activated to synergistically promote viral persistent propagation and polyamine biosynthesis in viruliferous vectors.Our data suggest that it is a novel mechanism for rhabdovirus to exploit OAZ1 for facilitating viral assembly.

关 键 词:Rice stripe mosaic virus RHABDOVIRUS Insect vector Polyamines OAZ1 ODC1 Viral assembly 

分 类 号:Q78[生物学—分子生物学]

 

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