Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/34197
Title: dKDM5/LID regulates H3K4me3 dynamics at the transcription-start site (TSS) of actively transcribed developmental genes
Author: Lloret-Llinares, Marta
Perez-Lluch, Silvia
Rossell, David
Morán, Tomás
Ponsà-Cobas, Joan
Auer, Herbert
Corominas, Montserrat (Corominas Guiu)
Azorín, F.
Keywords: Transcripció genètica
Expressió gènica
Genetic transcription
Gene expression
Issue Date: 16-Aug-2012
Publisher: Oxford University Press
Abstract: H3K4me3 is a histone modification that accumulates at the transcription-start site (TSS) of active genes and is known to be important for transcription activation. The way in which H3K4me3 is regulated at TSS and the actual molecular basis of its contribution to transcription remain largely unanswered. To address these questions, we have analyzed the contribution of dKDM5/LID, the main H3K4me3 demethylase in Drosophila, to the regulation of the pattern of H3K4me3. ChIP-seq results show that, at developmental genes, dKDM5/LID localizes at TSS and regulates H3K4me3. dKDM5/LID target genes are highly transcribed and enriched in active RNApol II and H3K36me3, suggesting a positive contribution to transcription. Expression-profiling show that, though weakly, dKDM5/LID target genes are significantly downregulated upon dKDM5/LID depletion. Furthermore, dKDM5/LID depletion results in decreased RNApol II occupancy, particularly by the promoter-proximal Pol lloser5 form. Our results also show that ASH2, an evolutionarily conserved factor that locates at TSS and is required for H3K4me3, binds and positively regulates dKDM5/LID target genes. However, dKDM5/LID and ASH2 do not bind simultaneously and recognize different chromatin states, enriched in H3K4me3 and not, respectively. These results indicate that, at developmental genes, dKDM5/LID and ASH2 coordinately regulate H3K4me3 at TSS and that this dynamic regulation contributes to transcription.
Note: Reproducció del document publicat a: http://nar.oxfordjournals.org/content/40/19/9493.full
It is part of: Nucleic Acids Research, 2012, vol. 40, num. 19, p. 9493-9505
URI: http://hdl.handle.net/2445/34197
ISSN: 0305-1048
Appears in Collections:Articles publicats en revistes (Genètica, Microbiologia i Estadística)

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