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Evolution of 7SK RNA and Its Protein Partners in Metazoa
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Evolution of 7SK RNA and Its Protein Partners in Metazoa
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Journal Article
Evolution of 7SK RNA and Its Protein Partners in Metazoa
2009
Overview
7SK RNA is a key player in the regulation of polymerase II transcription. 7SK RNA was considered as a highly conserved vertebrate innovation. The discovery of poorly conserved homologs in several insects and lophotrochozoans, however, implies a much earlier evolutionary origin. The mechanism of 7SK function requires interaction with the proteins HEXIM and La-related protein 7. Here, we present a comprehensive computational analysis of these two proteins in metazoa, and we extend the collection of 7SK RNAs by several additional candidates. In particular, we describe 7SK homologs in Caenorhabditis species. Furthermore, we derive an improved secondary structure model of 7SK RNA, which shows that the structure is quite well-conserved across animal phyla despite the extreme divergence at sequence level.
Publisher
Oxford University Press
Subject
