Plasmavirus

The virus family Plasmaviridae ( gr πλάσμα: formations ) comprises only one genus plasma virus of bacteriophages with circular, double-stranded DNA genome.

The Plasmaviridae do not have a capsid; its dsDNA genome is strongly twisted form ( supercoiled ) associated with viral basic nucleoproteins and is packaged as a so-called nucleoprotein directly into a lipid membrane. The lack of a capsid which Plasmaviridae caused irregularly shaped and average about 80 nm in diameter in size (range 50-125 nm). In the electron microscope, they represent rather bulbous, where one can distinguish virus particles with dense content ( packaged nucleoprotein ) of those without content within the membrane ( empty virions ). The virion were at least four structural proteins are detected, from which the product of the open reading frame ( ORF) ORF12 (17 kDa), the basic and the ORF13 nucleoprotein (81 kDa), could be an integral membrane protein. The genome of the prototype of the family, Acholeplasma phage L2 is 11,965 bp in size and has 15 ORFs, with the reading frame ORF13 * by a shift of the reading frame ( frameshift ) overlaps with ORF13.

The Acholeplasma phage L2 and also indicative of the genus species plasma virus ( phage V1, V2, V4, V5 and V7) infect different strains of bacteria Acholeplasma laidlawii ( family Mycoplasmataceae ); other preliminary species have Acholeplasma modicum ( phage M2) and Acholeplasma oculi ( phage O1) to the host.

System

  • Family Plasmaviridae
  • Genus plasma viral
  • Species Acholeplasma phage L2 ( L2 = phage )

Provisional species within the genus:

  • Species Acholeplasma phage M1
  • Species Acholeplasma phage O1
  • Species Acholeplasma phage v1
  • Species Acholeplasma phage v2
  • Species Acholeplasma phage v4
  • Species Acholeplasma phage v5
  • Species Acholeplasma phage v7
Virus classification National Center for Biotechnology Information Base (chemistry) Virus#Etymology Frameshift mutation
27144
de