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dc.contributor.author
Qüesta, Julia Irene
dc.contributor.author
Walbot, Virgina
dc.contributor.author
Casati, Paula
dc.date.available
2017-04-18T17:54:17Z
dc.date.issued
2010
dc.identifier.citation
Qüesta, Julia Irene; Walbot, Virgina; Casati, Paula; Mutator transposon activation after UV-B involves chromatin remodeling; Landes Bioscience; Epigenetics; 5; 2; 2010; 1-12
dc.identifier.issn
1559-2294
dc.identifier.uri
http://hdl.handle.net/11336/15373
dc.description.abstract
Spontaneous silencing of MuDR/Mu transposons occurs in ∼10–100% of the progeny of an active plant, and once silenced reactivation is very rare. To date, only radiation treatments have reactivated silenced Mu; for example UV-B radiation reactivated Mutator activities. Here we have investigated possible mechanisms by which UV-B could reactivate Mu transposons by monitoring transcript abundance, epigenetic DNA marks, and chromatin factors associated with these elements. We demonstrate that both mudrA and B transcripts are expressed at higher levels after an 8 h-UV-B treatment, in both active Mutator and silencing plants, and that different chromatin remodeling events occur in the promoter regions of MuDR than in non-autonomous Mu1 elements. Increased transcript abundance is accompanied by an increase in histone H3 acetylation and by decreased DNA and H3K9me2 methylation. No changes in siRNA levels were detected. In contrast, the decrease in H3K9me2 present at Mu elements after UV-B is significant in silencing plants, suggesting that early changes in H3 methylation in K9, chromatin remodeling, and transcription factor binding contribute directly to transposon reactivation by UV-B in maize.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Landes Bioscience
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Mutator Transposon
dc.subject
Uv-B
dc.subject
Chromatin Remodelling
dc.subject
Methylation
dc.subject.classification
Bioquímica y Biología Molecular
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Mutator transposon activation after UV-B involves chromatin remodeling
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-04-18T14:02:09Z
dc.identifier.eissn
1559-2308
dc.journal.volume
5
dc.journal.number
2
dc.journal.pagination
1-12
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Austin
dc.description.fil
Fil: Qüesta, Julia Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Centro de Estudios Fotosintéticos y Bioquímicos (i); Argentina. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina
dc.description.fil
Fil: Walbot, Virgina. University Of Stanford; Estados Unidos
dc.description.fil
Fil: Casati, Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Rosario. Centro de Estudios Fotosintéticos y Bioquímicos (i); Argentina. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas; Argentina
dc.journal.title
Epigenetics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.4161/epi.5.4.11751
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.4161/epi.5.4.11751
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2911508/
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