Isolation and characterization of a single-stranded DNA virus infecting the marine planktonic diatom Chaetoceros sp. (strain TG07-C28)

Kensuke Toyoda, Kei Kimura, Naotsugu Hata, Natsuko Nakayama, Keizo Nagasaki, Yuji Tomaru

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Diatom dynamics in the ocean represents one of the most interesting research themes for marine ecologists. Recent studies have shown the significance of viruses as potential sources of mortality for diatom populations, as well as the more traditional environmental factors. Here, we report the isolation and characterization of a new single- stranded DNA (ssDNA) virus (Csp05DNAV) that causes lysis in Chaetoceros sp. TG07-C28, isolated from the surface water of Ago Bay, Japan. The virus was isolated from the sediments in Ago Bay, and its infection was both lytic and species-specific. The latent period was estimated to be <24 h. The virion is 32-34 nm in diameter, and accumulates in the nucleus of host cells. Csp05DNAV has a closed circular ssDNA genome, which includes a partially double-stranded region. Partial sequence analysis revealed that the open reading frame of this virus genome was similar to the putative replicase-related proteins of previously reported diatom viruses that harbor a ssDNA genome; specifically, CsalDNAV, CdebDNAV, ClorDNAV, and CtenDNAV. Based on the genome structure, Csp05DNAV is considered to belong to the genus Bacilladnavirus. As both the host and virus were isolated from Ago Bay, the host-virus system probably is ecologically important in the bay. This finding provides basic information towards elucidating diatom dynamics in coastal waters.

Original languageEnglish
Pages (from-to)20-28
Number of pages9
JournalPlankton and Benthos Research
Volume7
Issue number1
DOIs
Publication statusPublished - 2012

Fingerprint

ssDNA viruses
Chaetoceros
Bacillariophyceae
virus
diatom
DNA
viruses
genome
single-stranded DNA
Bacilladnavirus
circular DNA
latent period
ecologists
virion
lysis
coastal water
open reading frames
surface water
sequence analysis
oceans

Keywords

  • Bacilladnavirus
  • Chaetoceros
  • Diatom
  • Rod-shaped particle
  • ssDNA

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science
  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Isolation and characterization of a single-stranded DNA virus infecting the marine planktonic diatom Chaetoceros sp. (strain TG07-C28). / Toyoda, Kensuke; Kimura, Kei; Hata, Naotsugu; Nakayama, Natsuko; Nagasaki, Keizo; Tomaru, Yuji.

In: Plankton and Benthos Research, Vol. 7, No. 1, 2012, p. 20-28.

Research output: Contribution to journalArticle

Toyoda, Kensuke ; Kimura, Kei ; Hata, Naotsugu ; Nakayama, Natsuko ; Nagasaki, Keizo ; Tomaru, Yuji. / Isolation and characterization of a single-stranded DNA virus infecting the marine planktonic diatom Chaetoceros sp. (strain TG07-C28). In: Plankton and Benthos Research. 2012 ; Vol. 7, No. 1. pp. 20-28.
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