Interaction of the Arabidopsis UV-B-specific signaling component UVR8 with chromatin

Cloix, C. and Jenkins, G.I. (2008) Interaction of the Arabidopsis UV-B-specific signaling component UVR8 with chromatin. Molecular Plant, 1(1), pp. 118-128. (doi:10.1093/mp/ssm012)

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Publisher's URL: http://dx.doi.org/10.1093/mp/ssm012

Abstract

Arabidopsis UV RESISTANCE LOCUS8 (UVR8) is a UV-B-specific signaling component that regulates expression of a range of genes concerned with UV protection. Here, we investigate the interaction of UVR8 with chromatin. Using antibodies specific to UVR8 in chromatin immunoprecipitation (ChIP) assays with wild-type plants, we show that native UVR8 binds to chromatin in vivo. Similar experiments using an anti-GFP antibody with plants expressing a GFPUVR8 fusion show that UVR8 associates with a relatively small region of chromatin containing the HY5 gene. UVR8 interacts with chromatin containing the promoter regions of other genes, but not with all the genes it regulates. UV-B is not required for the interaction of UVR8 with chromatin because association with several gene loci is observed in the absence of UV-B. Pull-down assays demonstrate that UVR8 associates with histones in vivo and competition experiments indicate that the interaction is preferentially with histone H2B. ChIP experiments using antibodies that recognize specific histone modifications indicate that the UV-B-stimulated transcription of some genes may be correlated with histone modification. In particular, the ELIP1 promoter showed a significant enrichment of diacetyl histone H3 (K9/K14) following UV-B exposure. These findings increase understanding of the interaction of the key UV-B-specific regulator UVR8 with chromatin.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Jenkins, Professor Gareth
Authors: Cloix, C., and Jenkins, G.I.
Subjects:Q Science > QH Natural history > QH301 Biology
College/School:College of Medical Veterinary and Life Sciences > Institute of Molecular Cell and Systems Biology
Journal Name:Molecular Plant
ISSN:1674-2052

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
392071UV-B signalling in ArabidopsisGareth JenkinsBiotechnology and Biological Sciences Research Council (BBSRC)BB/C007727/1Institute of Molecular Cell and Systems Biology
419341Characterisation of a UVB specific signalling pathwayGareth JenkinsBiotechnology and Biological Sciences Research Council (BBSRC)BB/D019281/1Institute of Molecular Cell and Systems Biology