Sequence analysis of the complete genome of papaya ringspot virus hainan isolate

Total RNA was extracted from infected papaya (Carica papaya L.) leaves in Hainan Province, and the full-length sequences of papaya ringspot virus were amplified by RT-PCR and RACE, and its complete genomic sequence was assembled, named Hainan-P isolate. The RNA genome sequence of Hainan-P isolate wa...

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Bibliographic Details
Published inBingdu xuebao Vol. 24; no. 2; p. 152
Main Authors Lu, Ya-Wei, Shen, Wen-Tao, Tang, Qing-Jie, Niu, Yan-Mei, Zhou, Peng
Format Journal Article
LanguageChinese
Published China 01.06.2008
Subjects
Carica - virology
Genome, Viral
Phylogeny
Potyvirus - classification
Potyvirus - genetics
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Summary:Total RNA was extracted from infected papaya (Carica papaya L.) leaves in Hainan Province, and the full-length sequences of papaya ringspot virus were amplified by RT-PCR and RACE, and its complete genomic sequence was assembled, named Hainan-P isolate. The RNA genome sequence of Hainan-P isolate was 10323 nucleotides (nts)in length,excluding the 3'-terminal poly(A) tail. And it was composed of a single open reading frame encoding a polyprotein of 3343 amino acids.. The result of homology analysis with twelve GenBank PRSV isolates showed that the polyprotein identity of Hainan-P ranged from 89. 8% to 93.2%, that was higher than the complete nt homology of 82.3% to 89.1%. The P1 amino acid was the least conserved (sharing homology only between 65.4% and 80.1%), whereas HC-Pro, CI and CP were the most conserved. Phylogenetic tree were constructed by the Neighbor-joining method in MEGA 3.1, which showed that PRSV isolates were obviously relevant to geographical origin, and it was impossible to delineate host-spe
ISSN:1000-8721