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Discovery of a dsRNA virus infecting the marine photosynthetic protist Micromonas pusilla - PubMed

  • ️Thu Jan 01 2004

. 2004 Feb 20;319(2):280-91.

doi: 10.1016/j.virol.2003.10.033.

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Discovery of a dsRNA virus infecting the marine photosynthetic protist Micromonas pusilla

C P D Brussaard et al. Virology. 2004.

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Abstract

We report the isolation of the first double-stranded (ds) RNA virus in the family Reoviridae that infects a protist (microalga Micromonas pusilla, Prasinophyceae). The dsRNA genome was composed of 11 segments ranging between 0.8 and 5.8 kb, with a total size of approximately 25.5 kb. The virus (MpRNAV-01B) could not be assigned to the genus level because host type, genome size, and number of segments smaller than 2 kb did not correspond to either of the two existing 11-segmented dsRNA genera Rotavirus and Aquareovirus. MpRNAV-01B has a particle size of 65-80 nm, a narrow host range, a latent period of 36 h, and contains five major proteins (120, 95, 67, 53, and 32 kDa). MpRNAV-01B was stable to freeze-thawing, resistant to chloroform, ether, nonionic detergents, chelating and reducing agents. The virus was inactivated at temperatures above 35 degrees C and by ionic detergent, ethanol, acetone, and acidic conditions (pH 2-5).

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