Plant Cell BIOBASE Corporation
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Cell Advance Online Publication
Published on December 2, 2005; 10.1105/tpc.105.037010

This Article
Right arrow Full Text - TPC Advance Online Pub. (PDF)
Right arrow All Versions of this Article:
18/1/119    most recent
tpc.105.037010v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Ng, D. W.-K.
Right arrow Articles by Hall, T. C.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Ng, D. W.-K.
Right arrow Articles by Hall, T. C.
Agricola
Right arrow Articles by Ng, D. W.-K.
Right arrow Articles by Hall, T. C.

Received August 10, 2005
Returned for revision October 26, 2005
Accepted November 9, 2005

Ordered Histone Modifications Are Associated with Transcriptional Poising and Activation of the phaseolin Promoter

Danny W.-K. Ng 1, Mahesh B. Chandrasekharan 1, and Timothy C. Hall 1*

1 Institute of Developmental and Molecular Biology and Department of Biology, Texas A&M University, College Station, Texas 77843-3155

* To whom correspondence should be addressed. E-mail: tim{at}idmb.tamu.edu.

The phaseolin (phas) promoter drives copious production of transcripts encoding the protein phaseolin during seed embryogenesis but is silent in vegetative tissues, in which a nucleosome is positioned over its three-phased TATA boxes. Transition from the inactive state in transgenic Arabidopsis thaliana leaves was accomplished by ectopic expression of the transcription factor Phaseolus vulgaris ABI3-like factor (ALF) and application of abscisic acid (ABA). Placement of hemagglutinin-tagged ALF expression under the control of an estradiol-inducible promoter permitted chromatin immunoprecipitation analysis of chronological changes in histone modifications, notably increased acetylation of H3-K9 and H4-K12, as phas chromatin was remodeled (potentiated). A different array of changes, including acetylation of H3-K14 and methylation of H3-K4, was found to be associated with ABA-mediated activation. Thus, temporal separation of phas potentiation from activation revealed that histone H3 and H4 Lys residues are not globally hyperacetylated during phas expression. Whereas decreases in histone H3 and H4 levels were detected during ALF-mediated remodeling, slight increases occurred after ABA-mediated activation, suggesting the restoration of histone-phas interactions or the replacement of histones in the phas chromatin. The observed histone modifications provide insight into factors involved in the euchromatinization and activation of a plant gene and expand the evidence for histone code conservation among eukaryotes.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications THE PLANT CELL PLANT PHYSIOLOGY
Copyright © 2005 by the American Society of Plant Biologists