Geminiviruses: a tale of a plasmid becoming a virus.
Geminiviruses: a tale of a plasmid becoming a virus.
复制标题
DOI:
10.1186/1471-2148-9-112
复制
发表时间:
2009-05-21
影响因子:
3.4
通讯作者:
Bamford DH
中科院分区:
文献类型:
--
作者:
Krupovic M;Ravantti JJ;Bamford DH
Geminiviruses (family Geminiviridae) are small single-stranded (ss) DNA viruses infecting plants. Their virion morphology is unique in the known viral world – two incomplete T = 1 icosahedra are joined together to form twinned particles. Geminiviruses utilize a rolling-circle mode to replicate their genomes. A limited sequence similarity between the three conserved motifs of the rolling-circle replication initiation proteins (RCR Reps) of geminiviruses and plasmids of Gram-positive bacteria allowed Koonin and Ilyina to propose that geminiviruses descend from bacterial replicons. Phylogenetic and clustering analyses of various RCR Reps suggest that Rep proteins of geminiviruses share a most recent common ancestor with Reps encoded on plasmids of phytoplasmas, parasitic wall-less bacteria replicating both in plant and insect cells and therefore occupying a common ecological niche with geminiviruses. Capsid protein of Satellite tobacco necrosis virus was found to be the best template for homology-based structural modeling of the geminiviral capsid protein. Good stereochemical quality of the generated models indicates that the geminiviral capsid protein shares the same structural fold, the viral jelly-roll, with the vast majority of icosahedral plant-infecting ssRNA viruses. We propose a plasmid-to-virus transition scenario, where a phytoplasmal plasmid acquired a capsid-coding gene from a plant RNA virus to give rise to the ancestor of geminiviruses.
登录
查看更多内容
DOI:
10.1073/pnas.93.2.759
发表时间:
1996-01-23
影响因子:
11.1
作者:
Bejarano, ER;Khashoggi, A;Lichtenstein, C
通讯作者:
Lichtenstein, C
影响因子:
5.4
作者:
Duffy, Siobain;Holmes, Edward C.
通讯作者:
Holmes, Edward C.
影响因子:
3.7
作者:
Ban, N;Larson, SB;McPherson, A
通讯作者:
McPherson, A
DOI:
10.1080/17486700802168247
发表时间:
2008-01-01
影响因子:
--
作者:
Bennett, Antonette;McKenna, Robert;Agbandje-McKenna, Mavis
通讯作者:
Agbandje-McKenna, Mavis
影响因子:
3.7
作者:
Casado, CG;Ortiz, GJ;Boulton, MI
通讯作者:
Boulton, MI