Recommendations for the classification and nomenclature of the DNA-β satellites of begomoviruses

The symptom-modulating, single-stranded DNA satellites (known as DNA-β) associated with begomoviruses (family Geminiviridae) have proven to be widespread and important components of a large number of plant diseases across the Old World. Since they were first identified in 2000, over 260 full-length...

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Bibliographic Details
Published in:Archives of virology Vol. 153; no. 4; pp. 763 - 781
Main Authors: Briddon, R. W, Brown, J. K, Moriones, E, Stanley, J, Zerbini, M, Zhou, X, Fauquet, C. M
Format: Journal Article
Language:English
Published: Vienna Vienna : Springer Vienna 01.04.2008
Springer Vienna
Subjects:
Begomovirus
Begomovirus - classification
Begomovirus - genetics
Biomedical and Life Sciences
Biomedicine
Classification - methods
DNA, Viral - classification
DNA, Viral - genetics
Geminiviridae
Geminiviridae - classification
Geminiviridae - genetics
host plants
Infectious Diseases
Medical Microbiology
Plant Diseases - virology
plant diseases and disorders
Plant Viruses - classification
Plant Viruses - genetics
satellites
sequence analysis
single-stranded DNA
Species Specificity
Terminology as Topic
Virology
Virology Division News
Helper Virus
Begomovirus Species
Cotton Leaf
Monopartite Genome
Indian Cassava Mosaic Virus
ISSN:0304-8608, 1432-8798
Online Access:Get full text
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Summary:The symptom-modulating, single-stranded DNA satellites (known as DNA-β) associated with begomoviruses (family Geminiviridae) have proven to be widespread and important components of a large number of plant diseases across the Old World. Since they were first identified in 2000, over 260 full-length sequences (~1,360 nucleotides) have been deposited with databases, and this number increases daily. This has highlighted the need for a standardised, concise and unambiguous nomenclature for these components, as well as a meaningful and robust classification system. Pairwise comparisons of all available full-length DNA-β sequences indicate that the minimum numbers of pairs occur at a sequence identity of 78%, which we propose as the species demarcation threshold for a distinct DNA-β. This threshold value divides the presently known DNA-β sequences into 51 distinct satellite species. In addition, we propose a naming convention for the satellites that is based upon the system already in use for geminiviruses. This maintains, whenever possible, the association with the helper begomovirus, the disease symptoms and the host plant and provides a logical and consistent system for referring to already recognised and newly identified satellites.
Bibliography:http://dx.doi.org/10.1007/s00705-007-0013-6
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ISSN:0304-8608
1432-8798
DOI:10.1007/s00705-007-0013-6