Bcep78likevirus

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Bcep78likevirus
Virus classification
Group:
Group I (dsDNA)
Order:
Caudovirales
Family:
Myoviridae
Subfamily:
Unassigned
Genus:
Bcep78likevirus
Type species
Burkholderia phage Bcep781

Bcep78likevirus is a genus of viruses in the family Myoviridae , not assigned to a subfamily. Bacteria serve as the natural host, with transmission achieved through passive diffusion. There are currently five species in this genus, including the type species Burkholderia phage Bcep781 . [1] [2] [3]

Virus Type of non-cellular infectious agent

A virus is a small infectious agent that replicates only inside the living cells of an organism. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea.

<i>Myoviridae</i> family of bacteriophages

The Myoviridae is a family of bacteriophages in the order Caudovirales. Bacteria and archaea serve as natural hosts. There are currently 93 species in this family, divided among four subfamilies and 30 genera.

Contents

Taxonomy

Species:

Structure

Bcep78likeviruses are nonenveloped, with a head and tail. [1]

Viral envelope lipid bilayer of a virion that surrounds the protein capsid, and may also contain glycoproteins

Some viruses have viral envelopes covering their protective protein capsids. The envelopes are typically derived from portions of the host cell membranes, but include some viral glycoproteins. They may help viruses avoid the host immune system. Glycoproteins on the surface of the envelope serve to identify and bind to receptor sites on the host's membrane. The viral envelope then fuses with the host's membrane, allowing the capsid and viral genome to enter and infect the host.

Genome

All five species have been fully sequenced and are available from ICTV. They range between 46k and 49k nucleotides, with 62 to 71 proteins. The complete genomes are available from here. [3]

Life cycle

The virus attaches to the host cell using its terminal fibers, and ejects the viral DNA into the host cytoplasm via contraction of its tail sheath. Once the viral genes have been replicated, the procapsid is assembled and packed. The tail is then assembled and the mature virions are released via lysis. [1]

History

According to the ICTV's 2010–11 report, the genus Bcep78likevirus was first accepted as a new genus, at the same time as all five of its contained species. This proposal is available here. [2]

The International Committee on Taxonomy of Viruses (ICTV) authorizes and organizes the taxonomic classification of and the nomenclatures for viruses. The ICTV have developed a universal taxonomic-scheme for viruses, and means to describe, name, and classify every virus that affects living organisms. The members of the International Committee on Taxonomy of Viruses are considered expert virologists. The ICTV was formed from and is governed by the Virology Division of the International Union of Microbiological Societies. Detailed work, such as delimiting the boundaries of species within a family, typically is performed by study groups of experts in the families.

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References

  1. 1 2 3 "Viral Zone". ExPASy. Archived from the original on 17 February 2015. Retrieved 17 February 2015.
  2. 1 2 ICTV. "Virus Taxonomy: 2013 Release" . Retrieved 17 February 2015.
  3. 1 2 NCBI. "Bcep78likevirus Complete Genomes" . Retrieved 17 February 2015.

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