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Alphasatellitidae: A new family with two subfamilies for the classication of geminivirus- and nanovirus-associated alphasatellites

Briddon Rob W., Martin Darren Patrick, Roumagnac Philippe, Navas-Castillo Jesús, Fiallo-Olivé Elvira, Moriones Enrique, Lett Jean-Michel, Zerbini F. Murilo, Varsani Arvind. 2018. Alphasatellitidae: A new family with two subfamilies for the classication of geminivirus- and nanovirus-associated alphasatellites. Archives of Virology, 163 (9) : pp. 2587-2600.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Quartile : Q3, Sujet : VIROLOGY

Abstract : Nanoviruses and geminiviruses are circular, single stranded DNA viruses that infect many plant species around the world. Nanoviruses and certain geminiviruses that belong to the Begomovirus and Mastrevirus genera are associated with additional circular, single stranded DNA molecules (~ 1-1.4 kb) that encode a replication-associated protein (Rep). These Rep-encoding satellite molecules are commonly referred to as alphasatellites and here we communicate the establishment of the family Alphasatellitidae to which these have been assigned. Within the Alphasatellitidae family two subfamilies, Geminialphasatellitinae and Nanoalphasatellitinae, have been established to respectively accommodate the geminivirus- and nanovirus-associated alphasatellites. Whereas the pairwise nucleotide sequence identity distribution of all the known geminialphasatellites (n = 628) displayed a troughs at ~ 70% and 88% pairwise identity, that of the known nanoalphasatellites (n = 54) had a troughs at ~ 67% and ~ 80% pairwise identity. We use these pairwise identity values as thresholds together with phylogenetic analyses to establish four genera and 43 species of geminialphasatellites and seven genera and 19 species of nanoalphasatellites. Furthermore, a divergent alphasatellite associated with coconut foliar decay disease is assigned to a species but not a subfamily as it likely represents a new alphasatellite subfamily that could be established once other closely related molecules are discovered.

Classification Agris : H20 - Plant diseases

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

  • Briddon Rob W., National Institute for Biotechnology and Genetic Engineering (PAK) - auteur correspondant
  • Martin Darren Patrick, Institute of Infectious Diseases and Molecular Medicine (ZAF)
  • Roumagnac Philippe, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0001-5002-6039
  • Navas-Castillo Jesús, Universidad de Málaga (ESP)
  • Fiallo-Olivé Elvira, Universidad de Málaga (ESP)
  • Moriones Enrique, Universidad de Málaga (ESP)
  • Lett Jean-Michel, CIRAD-BIOS-UMR PVBMT (REU)
  • Zerbini F. Murilo, Federal University of Viçosa (BRA)
  • Varsani Arvind, Arizona State University (USA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/588057/)

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