Viral Biorealm: Difference between revisions
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<center><font size="+3">Viral Biorealm</font> | |||
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< | <font size="+1">Authors:</font> | ||
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< | <font size="+2">Virus Classification: The Baltimore System</font></center><br /> | ||
== Group I. Double-stranded DNA viruses == | |||
Replicate using host or viral DNA polymerase. | Replicate using host or viral DNA polymerase. | ||
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== Group II. Single-stranded DNA == | |||
Genome consists of (+) sense DNA. Requires a host DNA polymerase to generate the complementary strand. Non-enveloped. | Genome consists of (+) sense DNA. Requires a host DNA polymerase to generate the complementary strand. Non-enveloped. | ||
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== Group III. Double-stranded RNA == | |||
Requires viral RNA-dependent RNA polymerase; usually packages the polymerase before exiting host cell. | Requires viral RNA-dependent RNA polymerase; usually packages the polymerase before exiting host cell. | ||
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== Group IV. (+) Sense single-stranded RNA viruses == | |||
Require viral RNA-dependent RNA polymerase to generate (-) template for progeny (+) genome. Usually non-segmented. | Require viral RNA-dependent RNA polymerase to generate (-) template for progeny (+) genome. Usually non-segmented. | ||
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== Group V. (-) Sense single-stranded RNA viruses == | |||
Require viral RNA-dependent RNA transcriptase. | Require viral RNA-dependent RNA transcriptase. | ||
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== Group VI. RNA Reverse Transcribing Viruses (Retroviruses) == | |||
Require viral reverse transcriptase to generate DNA copy for integration into host chromosome. Package transcriptase before exiting host cell. | Require viral reverse transcriptase to generate DNA copy for integration into host chromosome. Package transcriptase before exiting host cell. | ||
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== Group VII. DNA Reverse Transcribing Viruses (Pararetroviruses) == | |||
DNA is transcribed to RNA intermediate; reverse-transcribed to DNA. Infects plant cells, which have cytoplasmic reverse transcriptase; or package a viral reverse transcriptase. | DNA is transcribed to RNA intermediate; reverse-transcribed to DNA. Infects plant cells, which have cytoplasmic reverse transcriptase; or package a viral reverse transcriptase. | ||
Revision as of 19:59, 7 June 2006
Authors:
Molly Schlemmer '08, Shrochis Karki '09, Daniel Barich '05, Ryotaro Tashiro '09
Group I. Double-stranded DNA viruses
Replicate using host or viral DNA polymerase.
- Non-enveloped bacteriophages: Myoviridae, Siphoviridae, Tectiviridae.
- Non-enveloped animal viruses: Adenoviridae, Papovaviridae, Phycodnaviridae, Iridoviridae.
- Enveloped animal viruses: Herpesviridae, Poxviridae, Baculoviridae.
Group II. Single-stranded DNA
Genome consists of (+) sense DNA. Requires a host DNA polymerase to generate the complementary strand. Non-enveloped.
- Non-enveloped bacteriophages: Inoviridae.
- Archaeal virus: Fusellovirus.
- Non-enveloped animal viruses: Parvoviridae, Circoviridae.
- Non-enveloped plant viruses: Geminiviridae.
Group III. Double-stranded RNA
Requires viral RNA-dependent RNA polymerase; usually packages the polymerase before exiting host cell.
- Non-segmented, enveloped, bacteriophage: Cystoviridae.
- Segmented, non-enveloped, animal and plant hosts: Reoviridae, Birnaviridae, Varicosaviridae.
Group IV. (+) Sense single-stranded RNA viruses
Require viral RNA-dependent RNA polymerase to generate (-) template for progeny (+) genome. Usually non-segmented.
- Non-enveloped bacteriophages: Leviviridae.
- Non-enveloped animal and plant viruses: Bromoviridae, Picornaviridae, Tobamoviridae, Potyviridae.
- Enveloped animal and plant viruses: Coronaviridae, Flaviviridae, Togaviridae.
Group V. (-) Sense single-stranded RNA viruses
Require viral RNA-dependent RNA transcriptase.
- Segmented, enveloped: Orthomyxoviridae.
- Nonsegmented, enveloped: Filoviridae, Rhabdoviridae, Paramyxoviridae.
- Segmented (+/-) strand enveloped: Arenaviridae, Bunyaviridae.
Group VI. RNA Reverse Transcribing Viruses (Retroviruses)
Require viral reverse transcriptase to generate DNA copy for integration into host chromosome. Package transcriptase before exiting host cell.
Group VII. DNA Reverse Transcribing Viruses (Pararetroviruses)
DNA is transcribed to RNA intermediate; reverse-transcribed to DNA. Infects plant cells, which have cytoplasmic reverse transcriptase; or package a viral reverse transcriptase.
- Non-enveloped plant viruses: Caulimoviridae, Badnaviridae.
- Enveloped animal viruses: Hepadnaviridae.
