Remodeling of chromatin structure within the promoter is important for bmp-2-induced fgfr3 expression.

Abstract:

:Fibroblast growth factor receptor 3 (FGFR3) plays an important role in cartilage development. Although upregulation of FGFR3 expression in response to bone morphogenetic protein-2 (BMP-2) has been reported, the molecular mechanisms remain unknown. In this study, we used in vivo approaches to characterize BMP-2-induced alterations in the chromatin organization of the FGFR3 core promoter. Chromatin immunoprecipitation analysis demonstrated that the binding of Brg1, a component of the SWI/SNF remodeling complex, may selectively remodel a chromatin region (encompassing nucleotide -90 to +35), uncovering the transcription start site and three Sp1-binding sites, as revealed by nuclease digestion hypersensitivity assays. We then showed an increase in the association of Sp1 with the proximal promoter, followed by the recruitment of p300, resulting in a change of the histone 'code', such as in phosphorylation and methylation. Collectively, our study results suggest a model for BMP-2-induced FGFR3 expression in which the core promoter architecture is specifically regulated.

journal_name

Nucleic Acids Res

journal_title

Nucleic acids research

authors

Sun F,Chen Q,Yang S,Pan Q,Ma J,Wan Y,Chang CH,Hong A

doi

10.1093/nar/gkp261

subject

Has Abstract

pub_date

2009-07-01 00:00:00

pages

3897-911

issue

12

eissn

0305-1048

issn

1362-4962

pii

gkp261

journal_volume

37

pub_type

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