Molecular characterization of the complete genome of a novel partitivirus hosted by the saprobic mushroom Leucocybe candicans


Sahin E., KESKİN E., AKATA I.

ARCHIVES OF MICROBIOLOGY, vol.203, no.9, pp.5825-5830, 2021 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 203 Issue: 9
  • Publication Date: 2021
  • Doi Number: 10.1007/s00203-021-02540-y
  • Journal Name: ARCHIVES OF MICROBIOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Chemical Abstracts Core, EMBASE, Environment Index, Food Science & Technology Abstracts, MEDLINE, Veterinary Science Database
  • Page Numbers: pp.5825-5830
  • Keywords: Alphapartitivirus, dsRNA, Saprobic mushroom, Leucocybe candicans, VIRUSES, RNA, COMMON
  • Dokuz Eylül University Affiliated: Yes

Abstract

Virus communities of uncultivated fungi stay largely unknown. In the current study, we characterized a new partitivirus species detected in the basidiomycetous, saprobic mushroom Leucocybe candicans, named "Leucocybe candicans partitivirus 1" (LcPV1). The full-length genome of LcPV1, determined using deep sequencing and RLM-RACE approaches, consists of two dsRNA segments with each having the same size of 1984 bp. Both dsRNA genome segments comprise a single open reading frame (ORF), encoding an RNA-dependent RNA polymerase (RdRp), and a capsid protein (CP), respectively. Based on BLASTp search, the sequences of the RdRp and CP show the highest identity (50.09% and 35.71% similarity, respectively) to those of partitiviruses reported from an oomycetous, plant pathogenic, stramenopile algae Plasmopara viticola and basidiomycetous, plant pathogenic fungus Ceratobasidium sp., respectively. Phylogenetic analyses performed based on the RdRp and CP sequences revealed that LcPV1 falls within a cluster that includes different alphapartitivirus species from the family Partitiviridae. In this study, we propose that LcPV1 is a new member of a species belonging to the genus Alphapartitivirus. To our knowledge, this is the first study reporting on a new fungal virus (mycovirus) identified in the basidiomycetous, saprobic mushroom Leucocybe candicans.