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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Diversity of DNA β, a satellite molecule associated with some monopartite begomoviruses
Virology, Volume 312, No. 1, Year 2003
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Description
DNA β molecules are symptom-modulating, single-stranded DNA satellites associated with monopartite begomoviruses (family Geminiviridae). Such molecules have thus far been shown to be associated with Ageratum yellow vein virus from Singapore and Cotton leaf curl Multan virus from Pakistan. Here, 26 additional DNA β molecules, associated with diverse plant species obtained from different geographical locations, were cloned and sequenced. These molecules were shown to be widespread in the Old World, where monopartite begomoviruses are known to occur. Analysis of the sequences revealed a highly conserved organization for DNA β molecules consisting of a single conserved open reading frame, an adenine-rich region, and a region of high sequence conservation [the satellite conserved region (SCR)]. The SCR contains a potential hairpin structure with the loop sequence TAA/GTATTAC; similar to the origins of replication of geminiviruses and nanoviruses. Two major groups of DNA β satellites were resolved by phylogenetic analyses. One group originated from hosts within the Malvaceae and the second from a more diverse group of plants within the Solanaceae and Compositae. Within the two clusters, DNA β molecules showed relatedness based both on host and geographic origin. These findings strongly support coadaptation of DNA β molecules with their respective helper begomoviruses. © 2003 Elsevier Science (USA). All rights reserved.
Authors & Co-Authors
Briddon, Rob William
United Kingdom, Norwich
John Innes Centre
Bull, Simon E.
United Kingdom, Norwich
John Innes Centre
Amin, Imran J.
Pakistan, Faisalabad
National Institute for Biotechnology and Genetic Engineering Pakistan
Idris, Ali M.
United States, Tucson
The University of Arizona
Mansoor, Shahid
Pakistan, Faisalabad
National Institute for Biotechnology and Genetic Engineering Pakistan
Bedford, Ian D.
United Kingdom, Norwich
John Innes Centre
Dhawan, Poonam
India, Hisar
Ccs Haryana Agricultural University
Rishi, Narayan
India, Hisar
Ccs Haryana Agricultural University
Siwatch, Surender S.
India, Hisar
Ccs Haryana Agricultural University
Abdel-Salam, Aly Mohamed Mamoun
Egypt, Giza
Faculty of Agriculture
Brown, Judith K.
United States, Tucson
The University of Arizona
Zafar, Yusuf
Pakistan, Faisalabad
National Institute for Biotechnology and Genetic Engineering Pakistan
Markham, Peter G.
United Kingdom, Norwich
John Innes Centre
Statistics
Citations: 427
Authors: 13
Affiliations: 5
Identifiers
Doi:
10.1016/S0042-6822(03)00200-9
ISSN:
00426822
Research Areas
Genetics And Genomics