Cystoviridae

From MicrobeWiki, the student-edited microbiology resource

A Viral Biorealm page on the family Cystoviridae

Contents 1 Baltimore Classification 1.1 Higher order taxa 1.2 Genera 2 Description and Significance 3 Genome Structure 4 Virion Structure of a Cystoviridae 5 Reproduction Cycle of a Cystoviridae in a Host Cell 6 Viral Ecology & Pathology 7 References

Baltimore Classification

Higher order taxa

Viruses; dsRNA viruses; Cystoviridae

Genera

Cystovirus

Description and Significance

Cystoviridae infects Pseudomonas species of bacteria.

Genome Structure

The genome of cystoviridae is segmented and consists of three segments of linear, double-stranded RNA. The complete genome is 13379 nucleotides long. RNA-S is fully sequenced and the complete sequence is 2948 nucleotides long. The genome has a guanine + cytosine content of 55.2 %, 56.7 % or 55.5 % for L, M and S respectively. The multipartite genome is found in one type of particle only. (source: ICTV dB Descriptions)

Virion Structure of a Cystoviridae

Phages consist of an envelope, a capsid and a polymerase complex. The virus capsid is not enveloped. The virions are spherical and measure 86 nm in diameter. Surface projections are distinctive spikes that cover the surface evenly. The surface projections comprise of P3 adsorption proteins and fusion proteins P6. The surface projections are composed of one type of protein and are 8 nm long. The capsid is round and exhibits icosahedral symmetry. The nucleocapsid is isometric and has a diameter of 58 nm. The nucleocapsid contains a polymerase complex that is dodecahedral in shape and has a diameter of about 43 nm. (source: ICTV dB Descriptions)

Reproduction Cycle of a Cystoviridae in a Host Cell

Viral Ecology & Pathology

References

ICTV dB Descriptions