Long non-coding RNA ChRO1 facilitates ATRX/DAXX-dependent H3.3 deposition for transcription-associated heterochromatin reorganization.
Nucleic Acids Res
; 46(22): 11759-11775, 2018 12 14.
Article
en En
| MEDLINE
| ID: mdl-30335163
ABSTRACT
Constitutive heterochromatin undergoes a dynamic clustering and spatial reorganization during myogenic differentiation. However the detailed mechanisms and its role in cell differentiation remain largely elusive. Here, we report the identification of a muscle-specific long non-coding RNA, ChRO1, involved in constitutive heterochromatin reorganization. ChRO1 is induced during terminal differentiation of myoblasts, and is specifically localized to the chromocenters in myotubes. ChRO1 is required for efficient cell differentiation, with global impacts on gene expression. It influences DNA methylation and chromatin compaction at peri/centromeric regions. Inhibition of ChRO1 leads to defects in the spatial fusion of chromocenters, and mislocalization of H4K20 trimethylation, Suv420H2, HP1, MeCP2 and cohesin. In particular, ChRO1 specifically associates with ATRX/DAXX/H3.3 complex at chromocenters to promote H3.3 incorporation and transcriptional induction of satellite repeats, which is essential for chromocenter clustering. Thus, our results unveil a mechanism involving a lncRNA that plays a role in large-scale heterochromatin reorganization and cell differentiation.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Proteínas Nucleares
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Heterocromatina
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Histonas
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Proteínas Portadoras
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Desarrollo de Músculos
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Péptidos y Proteínas de Señalización Intracelular
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ARN Largo no Codificante
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Proteína Nuclear Ligada al Cromosoma X
Tipo de estudio:
Risk_factors_studies
Idioma:
En
Revista:
Nucleic Acids Res
Año:
2018
Tipo del documento:
Article