Plant lineage-specific amplification of transcription factor binding motifs by miniature inverted-repeat transposable elements (MITEs)
Morata, Jordi (Centre de Recerca en Agrigenòmica)
Marín Nieto, Fátima (Centre de Recerca en Agrigenòmica)
Payet, Jordi
Casacuberta i Suñer, Josep M. 1962- (Centre de Recerca en Agrigenòmica)

Data:	2018
Resum:	Transposable elements are one of the main drivers of plant genome evolution. Transposon insertions can modify the gene coding capacity or the regulation of their expression, the latter being a more subtle effect, and therefore particularly useful for evolution. Transposons have been show to contain transcription factor binding sites that can be mobilized upon transposition with the potential to integrate new genes into transcriptional networks. Miniature inverted-repeat transposable elements (MITEs) are a type of noncoding DNA transposons that could be particularly suited as a vector to mobilize transcription factor binding sites and modify transcriptional networks during evolution. MITEs are small in comparison to other transposons and can be excised, which should make them less mutagenic when inserting into promoters. On the other hand, in spite of their cut-and-paste mechanisms of transposition, they can reach very high copy numbers in genomes. We have previously shown that MITEs have amplified and redistributed the binding motif of the E2F transcription factor in different Brassicas. Here, we show that MITEs have amplified and mobilized the binding motifs of the bZIP60 and PIF3 transcription factors in peach and Prunus mume, and the TCP15/23 binding motif in tomato. Our results suggest that MITEs could have rewired new genes into transcriptional regulatory networks that are responsible for important adaptive responses and breeding traits in plants, such as stress responses, flowering time, or fruit ripening. The results presented here therefore suggest a general impact of MITEs in the evolution of transcriptional regulatory networks in plants.
Ajuts:	Ministerio de Economía y Competitividad AGL2016-78992-R Ministerio de Economía y Competitividad AGL2013-43244-R Ministerio de Economía y Competitividad SEV-2015-0533
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Peach ; Prunus mume ; Tomato ; Transposable element ; Transcription regulation ; Evolution
Publicat a:	Genome biology and evolution, Vol. 10, issue 5 (May 2018) , p. 1210-1220, ISSN 1759-6653

DOI: 10.1093/gbe/evy073
PMID: 29659815

11 p, 563.4 KB

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