Maternal histone variants and their chaperones promote paternal genome activation and boost somatic cell reprogramming.
Bioessays
; 37(1): 52-9, 2015 Jan.
Article
en En
| MEDLINE
| ID: mdl-25328107
ABSTRACT
The mammalian egg employs a wide spectrum of epigenome modification machinery to reprogram the sperm nucleus shortly after fertilization. This event is required for transcriptional activation of the paternal/zygotic genome and progression through cleavage divisions. Reprogramming of paternal nuclei requires replacement of sperm protamines with canonical and non-canonical histones, covalent modification of histone tails, and chemical modification of DNA (notably oxidative demethylation of methylated cytosines). In this essay we highlight the role maternal histone variants play during developmental reprogramming following fertilization. We discuss how reduced maternal histone variant incorporation in somatic nuclear transfer experiments may explain the reduced viability of resulting embryos and how knowledge of repressive and activating maternal factors may be used to improve somatic cell reprogramming.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Histonas
/
Genoma
/
Chaperonas Moleculares
/
Reprogramación Celular
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Bioessays
Asunto de la revista:
BIOLOGIA
/
BIOLOGIA MOLECULAR
Año:
2015
Tipo del documento:
Article
País de afiliación:
Estados Unidos