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Identification and molecular characterization of a single-stranded circular DNA virus with similarities to Sclerotinia sclerotiorum hypovirulence-associated DNA virus 1

文献类型： 外文期刊

作者： Du, Zhenguo 1 ; Tang, Yafei 1 ; Zhang, Songbai 3 ; She, Xiaoman 1 ; Lan, Guobing 1 ; Varsani, Arvind 4 ; He, Zifu 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou 510640, Guangdong, Peoples R China

2.Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou 510640, Guangdong, Peoples R China

3.Yangtze Univ, Coll Agr, Jinzhou 434025, Hubei, Peoples R China

4.Univ Cape Town, Div Med Biochem, Dept Clin Lab Sci, Electron Microscope Unit, ZA-7701 Cape Town, South Africa

5.Univ Canterbury, Sch Biol Sci, Christchurch 8140, New Zealand

6.Univ Canterbury, Biomol Interact Ctr, Christchurch 8140, New Zealand

期刊名称：ARCHIVES OF VIROLOGY （ 影响因子：2.574； 五年影响因子：2.466 ）

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收录情况： SCI

摘要： A putative circular single-stranded DNA (ssDNA) virus was recovered from Hypericum japonicum collected in Vietnam. The viral isolate was tentatively named Hypericum japonicum-associated circular DNA virus (HJasCV). HJasCV shares 58.7-65.4% nucleotide sequence identity with Sclerotinia sclerotiorum hypovirulence-associated DNA virus 1 (SsHADV-1) and SsHADV-1-like viruses. Like this group of viruses, the genome of HJasCV (2 200 nt) has two large ORFs, one in the virion-sense and the other in the complementary-sense DNA. The proteins encoded in the virion-sense and complementary-sense ORFs share 39-46 % and 45-67 % amino acid sequence identity with the putative capsid and replication-associated proteins (Reps), respectively, of SsHADV-1 and SsHADV-1-like viruses. The putative Rep of HJasCV contains all of the motifs related to rolling-circle replication. Its 111-bp intergenic region (IR) contains a hairpin structure with a geminivirus-like nonanucleotide sequence, TAATGTTAT, at the apex of the loop. Phylogenetic analysis revealed that HJasCV forms a monophyletic clade with SsHADV-1 and SsHADV-1-like viruses.

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