Functional crosstalk between histone H2B ubiquitylation and H2A modifications and variants.
Nat Commun
; 9(1): 1394, 2018 04 11.
Article
em En
| MEDLINE
| ID: mdl-29643390
ABSTRACT
Ubiquitylation of histone H2B at lysine residue 120 (H2BK120ub) is a prominent histone posttranslational modification (PTM) associated with the actively transcribed genome. Although H2BK120ub triggers several critical downstream histone modification pathways and changes in chromatin structure, less is known about the regulation of the ubiquitylation reaction itself, in particular with respect to the modification status of the chromatin substrate. Here we employ an unbiased library screening approach to profile the impact of pre-existing chromatin modifications on de novo ubiquitylation of H2BK120 by the cognate human E2E3 ligase pair, UBE2ARNF20/40. Deposition of H2BK120ub is found to be highly sensitive to PTMs on the N-terminal tail of histone H2A, a crosstalk that extends to the common histone variant H2A.Z. Based on a series of biochemical and cell-based studies, we propose that this crosstalk contributes to the spatial organization of H2BK120ub on gene bodies, and is thus important for transcriptional regulation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Histonas
/
Nucleossomos
/
Processamento de Proteína Pós-Traducional
/
Montagem e Desmontagem da Cromatina
Limite:
Humans
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article