title: Identification of a naturally occurring recombinant isolate of Sugarcane mosaic virus causing maize dwarf mosaic disease.
abstract: The complete nucleotide sequence of a potyvirus causing severe maize dwarf mosaic disease in Shaanxi province, northwestern China was determined (GenBank accession No. AY569692). The full genome is 9596 nucleotides in length excluding the 3 '-terminal poly (A) sequence. It contains a large open reading frame (ORF) flanked by a 149 nt 5'-untranslated region (UTR) and a 255 nt 3'-UTR. The putative polyprotein encoded by this large ORF comprises of 3063 amino acid residues. Sequence comparisons and phylogenetic analyses showed that this potyvirus is an isolate of Sugarcane mosaic virus (SCMV). The entire sequences shared identities of 89.6-97.6 % and 79.3-93.3% with 9 sequenced SCMV isolates at the nucleotide and deduced amino acid levels, respectively. But it showed much lower identities with Maize dwarf mosaic virus (MDMV), Sorghum mosaic virus (SrMV) and Johnsongrass mosaic virus (JGMV) isolates. The putative coat protein sequence is identical to that of a Chinese maize isolate SCMV-HZ. However, partition comparisons and phylogenetic profile analyses of the viral nucleotide sequences indicated that it is a recombinant isolate of SCMV. The recombination sites are located within the 6K1 and CI coding regions.
authors.affiliation: Peking-Yale Joint Center for Plant Molecular Genetics and Agro-biotechnology, The National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing 100871, China.
authors.forename: Yongwang
authors.initials: Y
authors.lastname: Zhong
authors.forename: Anyuan
authors.initials: A
authors.lastname: Guo
authors.forename: Chunbo
authors.initials: C
authors.lastname: Li
authors.forename: Binquan
authors.initials: B
authors.lastname: Zhuang
authors.forename: Ming
authors.initials: M
authors.lastname: Lai
authors.forename: Chunhong
authors.initials: C
authors.lastname: Wei
authors.forename: Jingchu
authors.initials: J
authors.lastname: Luo
authors.forename: Yi
authors.initials: Y
authors.lastname: Li
mesh_terms: D020413:3' Untranslated Regions / Q000235:genetics; D020121:5' Untranslated Regions / Q000235:genetics; D000595:Amino Acid Sequence; D001483:Base Sequence; D036022:Capsid Proteins / Q000235:genetics; D002681:China; D016679:Genome, Viral; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D010802:Phylogeny; D010935:Plant Diseases / Q000821:virology; D017800:Potyvirus / Q000235:genetics* / Q000302:isolation & purification; D011995:Recombination, Genetic; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid
chemical_list: D020413:3' Untranslated Regions; D020121:5' Untranslated Regions; D036022:Capsid Proteins
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