tailieunhanh - Báo cáo khoa học: "A highly divergent South African geminivirus species illuminates the ancient evolutionary history of this family"

A highly divergent South African geminivirus species illuminates the ancient evolutionary history of this family | Virology Journal BioMed Central Research A highly divergent South African geminivirus species illuminates the ancient evolutionary history of this family Arvind Varsani1 2 Dionne N Shepherd3 Kyle Dent2 3 Aderito L Monjane3 Edward P Rybicki3 4 and Darren P Martin 4 Open Access Address 1School of Biological Sciences University of Canterbury Private Bag 4800 Christchurch New Zealand 2Electron Microscope Unit University of Cape Town Rondebosch Cape Town 7701 South Africa 3Department of Molecular and Cell Biology University of Cape Town Rondebosch Cape Town 7701 South Africa and institute of Infectious Disease and Molecular Medicine University of Cape Town Observatory Cape Town 7925 South Africa Email Arvind Varsani - Dionne N Shepherd - Kyle Dent - Aderito L Monjane - Edward P Rybicki - Darren P Martin - Corresponding author Published 25 March 2009 Received 10 February 2009 Accepted 25 March 2009 Virologyjournal 2009 6 36 doi l743-422X-6-36 This article is available from http content 6 1 36 2009 Varsani et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract Background We have characterised a new highly divergent geminivirus species Eragrostis curvula streak virus ECSV found infecting a hardy perennial South African wild grass. ECSV represents a new genus-level geminivirus lineage and has a mixture of features normally associated with other specific geminivirus genera. Results Whereas the ECSV genome is predicted to express a replication associated protein Rep from an unspliced complementary strand transcript that is most similar to those of begomoviruses

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