Enhancer regions show high histone H3.3 turnover that changes during differentiation.
Elife
; 52016 06 15.
Article
em En
| MEDLINE
| ID: mdl-27304074
ABSTRACT
The organization of DNA into chromatin is dynamic; nucleosomes are frequently displaced to facilitate the ability of regulatory proteins to access specific DNA elements. To gain insight into nucleosome dynamics, and to follow how dynamics change during differentiation, we used a technique called time-ChIP to quantitatively assess histone H3.3 turnover genome-wide during differentiation of mouse ESCs. We found that, without prior assumptions, high turnover could be used to identify regions involved in gene regulation. High turnover was seen at enhancers, as observed previously, with particularly high turnover at super-enhancers. In contrast, regions associated with the repressive Polycomb-Group showed low turnover in ESCs. Turnover correlated with DNA accessibility. Upon differentiation, numerous changes in H3.3 turnover rates were observed, the majority of which occurred at enhancers. Thus, time-ChIP measurement of histone turnover shows that active enhancers are unusually dynamic in ESCs and changes in highly dynamic nucleosomes predominate at enhancers during differentiation.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Histonas
/
Nucleossomos
/
Diferenciação Celular
/
Células-Tronco Embrionárias Murinas
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Elife
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
Estados Unidos