Difference between revisions of "Retroviridae"

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(Reproduction Cycle of a (virus name here) in a Host Cell)
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The virions of a retroviridae consist of an encelope, a nucleocapsid and a nucleoid. The virus capsid is enveloped. The virions are spherical to pleomorphic and measure 80-100 nm in diameter. The surface projections are small or distinctive glycoprotein spikes that cover the surface evenly. The projections are densely dispersed and 8 nm long. The nucleoid is concentric or eccentric while the core is spherical. (source: [http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/index.htm ICTVdB Descriptions])
 
The virions of a retroviridae consist of an encelope, a nucleocapsid and a nucleoid. The virus capsid is enveloped. The virions are spherical to pleomorphic and measure 80-100 nm in diameter. The surface projections are small or distinctive glycoprotein spikes that cover the surface evenly. The projections are densely dispersed and 8 nm long. The nucleoid is concentric or eccentric while the core is spherical. (source: [http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/index.htm ICTVdB Descriptions])
  
==Reproduction Cycle of a (virus name here) in a Host Cell==
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==Reproduction Cycle of a Retroviridae in a Host Cell==
 
 
 
 
  
 
==Viral Ecology & Pathology==
 
==Viral Ecology & Pathology==

Revision as of 18:16, 19 June 2006

Baltimore Classification

Higher order taxa

Viruses; Retro-transcribing viruses; Reoviridae

Genera

Alpharetrovirus, Betaretrovirus, Spumavirus (examples)

Description and Significance

Genome Structure

The genome of retroviridae is dimeric, unsegmented and contains a single molecule of linear. The genome is -RT and a positive-sense, single-stranded RNA. Minor species of non-genomic nucleic acid are also found in virions. The encapsidated nucleic acid is mainly of genomic origin but virions may also contain nucleic acid of host origin, including host RNA and fragments of host DNA believed to be incidental inclusions. The complete genome of one monomer is 700-11000 nucleotides long. The 5'-end of the genome has a methylated nucleotide cap with a cap sequence type 1 m7G5ppp5'GmpNp. The 3'-terminus of each monomer has a poly (A) tract and the terminus has a tRNA-like structure. (source: ICTVdB Descriptions)

Virion Structure of a Retroviridae

The virions of a retroviridae consist of an encelope, a nucleocapsid and a nucleoid. The virus capsid is enveloped. The virions are spherical to pleomorphic and measure 80-100 nm in diameter. The surface projections are small or distinctive glycoprotein spikes that cover the surface evenly. The projections are densely dispersed and 8 nm long. The nucleoid is concentric or eccentric while the core is spherical. (source: ICTVdB Descriptions)

Reproduction Cycle of a Retroviridae in a Host Cell

Viral Ecology & Pathology

References

ICTVdB Descriptions