Evolution of plant RNA polymerase IV/V genes: evidence of subneofunctionalization of duplicated <Emphasis Type="Italic">NRPD2/NRPE2</Emphasis>-like paralogs in <Emphasis Type="Italic">Viola</Emphasis> (Violaceae) |
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Authors: | Thomas Marcussen Bengt Oxelman Anna Skog Kjetill S Jakobsen |
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Institution: | 1.Centre for Ecological and Evolutionary Synthesis (CEES),Department of Biology, University of Oslo,Oslo,Norway;2.Department of Plant and Environmental Sciences,University of Gothenburg,G?teborg,Sweden |
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Abstract: | Background DNA-dependent RNA polymerase IV and V (Pol IV and V) are multi-subunit enzymes occurring in plants. The origin of Pol V, specific
to angiosperms, from Pol IV, which is present in all land plants, is linked to the duplication of the gene encoding the largest
subunit and the subsequent subneofunctionalization of the two paralogs (NRPD1 and NRPE1). Additional duplication of the second-largest subunit, NRPD2/NRPE2, has happened independently in at least some eudicot lineages, but its paralogs are often subject to concerted evolution
and gene death and little is known about their evolution nor their affinity with Pol IV and Pol V. |
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