Hot crenarchaeal viruses reveal deep evolutionary connections |
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Authors: | Ortmann Alice C Wiedenheft Blake Douglas Trevor Young Mark |
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Institution: | Thermal Biology Institute, Montana State University, Bozeman, Montana 59717, USA. |
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Abstract: | The discovery of archaeal viruses provides insights into the fundamental biochemistry and evolution of the Archaea. Recent studies have identified a wide diversity of archaeal viruses within the hot springs of Yellowstone National Park and other high-temperature environments worldwide. These viruses are often morphologically unique and code for genes with little similarity to other known genes in the biosphere, a characteristic that has complicated efforts to trace their evolutionary history. Comparative genomics combined with structural analysis indicate that spindle-shaped virus lineages might be unique to the Archaea, whereas other icosahedral viruses might share a common lineage with viruses of Bacteria and Eukarya. These studies provide insights into the evolutionary history of viruses in all three domains of life. |
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