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- Girus abstract "A girus (a contraction of giant virus or gigantic virus) is a very large virus. They are giant nucleocytoplasmic large DNA viruses (NCLDVs), having unique genes not found in other life, with separate phylogenic trees for those genes.While the exact criteria as defined in the scientific literature varies, giruses are generally described as those viruses having large pseudo-icosahedral capsids (200 to 400 nanometers) surrounded by a thick (approximately 100 nm) layer of filamentous protein fibers with large double-stranded DNA genomes (300 to 1000 kilobase pairs or larger) encoding a large contingent of genes (of the order of 1000 genes). While few have been characterized in detail, the most notable examples of giruses are the phylogenetically related megavirus and mimivirus, belonging to the Megaviridae and Mimiviridae families, respectively, having the largest capsid diameters of all known viruses.Viral replication in giruses occurs within large circular virion factories located within the cytoplasm of the infected host cell, similar to the replication mechanism utilized by Poxviridae, though whether this mechanism is employed by all giruses or only mimivirus and the related mamavirus has yet to be determined. These virion replication factories are themselves subject to infection by the virophage satellite viruses, which inhibit or impair the reproductive capabilities of the complementary virus.Girus genomes, in addition to being the largest known for viruses, contain genes that encode for important elements of translation machinery, a characteristic that had previously been believed to be indicative of cellular organisms. These genes include multiple genes encoding a number of aminoacyl tRNA synthetases, enzymes that catalyze the esterification of specific amino acids or their precursors to their corresponding cognate tRNAs to form an aminoacyl tRNA, that is then used during translation. The presence of four aminoacyl tRNA synthetase encoding genes in mimivirus and mamavirus genomes, both species within the Mimiviridae family, as well as the discovery of seven aminoacyl tRNA synthetase genes, including the four genes present in Mimiviridae, in the megavirus genome provide evidence for a possible scenario in which these large DNA viruses evolved from a shared ancestral cellular genome by means of genome reduction.The discovery and subsequent characterization of these giant viruses has triggered some debate concerning the evolutionary origins of the giruses, going so far as to suggest that the giruses provide evidence of a fourth domain of life.".
- Girus colourName "violet".
- Girus wikiPageExternalLink giant-virus-toplist.
- Girus wikiPageID "31933725".
- Girus wikiPageLength "8958".
- Girus wikiPageOutDegree "23".
- Girus wikiPageRevisionID "696735868".
- Girus wikiPageWikiLink Aminoacyl-tRNA.
- Girus wikiPageWikiLink Aminoacyl_tRNA_synthetase.
- Girus wikiPageWikiLink Capsid.
- Girus wikiPageWikiLink Category:Nucleocytoplasmic_large_DNA_viruses.
- Girus wikiPageWikiLink Cytoplasm.
- Girus wikiPageWikiLink Ester.
- Girus wikiPageWikiLink Genome_size.
- Girus wikiPageWikiLink Giant_Virus_Finder.
- Girus wikiPageWikiLink Mamavirus.
- Girus wikiPageWikiLink Megaviridae.
- Girus wikiPageWikiLink Megavirus.
- Girus wikiPageWikiLink Mimiviridae.
- Girus wikiPageWikiLink Mimivirus.
- Girus wikiPageWikiLink Nucleocytoplasmic_large_DNA_viruses.
- Girus wikiPageWikiLink Pandoravirus.
- Girus wikiPageWikiLink Poxviridae.
- Girus wikiPageWikiLink Satellite_(biology).
- Girus wikiPageWikiLink Transfer_RNA.
- Girus wikiPageWikiLink Translation_(biology).
- Girus wikiPageWikiLink Virophage.
- Girus wikiPageWikiLink Virus.
- Girus wikiPageWikiLinkText "Girus".
- Girus wikiPageWikiLinkText "giant DNA viruses".
- Girus wikiPageWikiLinkText "giant viruses".
- Girus color "violet".
- Girus virusGroup "i".
- Girus wikiPageUsesTemplate Template:Baltimore_classification.
- Girus wikiPageUsesTemplate Template:Distinguish.
- Girus wikiPageUsesTemplate Template:Merge_to.
- Girus wikiPageUsesTemplate Template:Reflist.
- Girus wikiPageUsesTemplate Template:Taxobox.
- Girus subject Category:Nucleocytoplasmic_large_DNA_viruses.
- Girus type Species.
- Girus type Thing.
- Girus comment "A girus (a contraction of giant virus or gigantic virus) is a very large virus.".
- Girus label "Girus".
- Girus differentFrom Gyrus.
- Girus sameAs Q3754404.
- Girus sameAs Obří_viry.
- Girus sameAs Hiirus.
- Girus sameAs Virus_géant.
- Girus sameAs ഗൈറസ്.
- Girus sameAs m.03czr9v.
- Girus sameAs m.0gvs4bh.
- Girus sameAs Q3754404.
- Girus wasDerivedFrom Girus?oldid=696735868.
- Girus isPrimaryTopicOf Girus.