Journal
JOURNAL OF VIROLOGY
Volume 79, Issue 23, Pages 14967-14970Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/JVI.79.23.14967-14970.2005
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Comparative analysis of capsid protein structures in the eukaryote-infecting herpesviruses (Herpesviridae) and the prokaryote-infecting tailed DNA bacteriophages (Caudovirales) revealed a characteristic fold that is restricted to these two virus lineages and is indicative of common ancestry. This fold not only serves as a major architectural element in capsid stability but also enables the conformational flexibility observed during viral assembly and maturation. On the basis of this and other emerging relationships, it seems increasingly likely that the very diverse collection of extant viruses may have arisen from a relatively small number of primordial progenitors.
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