doi: 10.1002/jez.b.21273.
Simultaneous expansions of microRNAs and protein-coding genes by gene/genome duplications in early vertebrates
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- PMID:19214983
- DOI: 10.1002/jez.b.21273
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Simultaneous expansions of microRNAs and protein-coding genes by gene/genome duplications in early vertebrates
Xun Gu et al. J Exp Zool B Mol Dev Evol..
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Abstract
Does miRNAs underlie the origin of organismal complexity in vertebrates? The current controversy is focused on whether the inventory of vertebrate miRNAs can be explained by the classical two-round genome duplications. We estimate the age distribution of vertebrate miRNA duplication events, showing the evolutionary scenario that gene/genome duplications in the early stage of vertebrates may expand the protein-encoding genes and miRNAs simultaneously. We further speculate that genetically lying behind the evolution of vertebrate complexity may be the proteome doubling and alterations of the epigenetic (including miRNA) machinery.
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