Virion protein sequence variation among Australian isolates of turnip yellow mosaic tymovirus

被引:14
作者
Hayden, CM
Mackenzie, AM
Gibbs, AJ
机构
[1] Australian Natl Univ, Res Sch Biol Sci, Mol Evolut & Systemat Grp, Canberra, ACT 2601, Australia
[2] Australian Natl Univ, Res Sch Biol Sci, Cooperat Res Ctr, Canberra, ACT 2601, Australia
关键词
D O I
10.1007/s007050050279
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The virion protein genes, and 3' untranslated regions, of six variants of turnip yellow mosaic tymovirus (TYMV) that produced different symptoms in their native host Cardamine robusta and in Chinese cabbage plants, have been sequenced. The sequences have been compared with each other, and with the same region of the pBL-16 clone of the Blue Lake isolate of TYMV. The sequences of the virion protein genes differed by a mean of 1.89% (range 0-2.82%), and the encoded proteins by a mean of 1.71% (range 0-3.17%). The nucleotide differences were confined to the 5'-most 60% of the gene, whereas there were amino acid differences only among residues 12 to 29 and residue 102 (numbered from the N-terminus) of the virion protein involving only hydrophobic residues at the surface of the protein. The amino acid and nucleotide differences between the seven isolates did not correlate with differences in the symptoms they caused, but confirmed earlier estimates of genetic variability in the wild populations of the virus.
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收藏
页码:191 / 201
页数:11
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