Histone variants at a glance.
J Cell Sci
; 134(6)2021 03 26.
Article
en En
| MEDLINE
| ID: mdl-33771851
ABSTRACT
Eukaryotic nucleosomes organize chromatin by wrapping 147â
bp of DNA around a histone core particle comprising two molecules each of histone H2A, H2B, H3 and H4. The DNA entering and exiting the particle may be bound by the linker histone H1. Whereas deposition of bulk histones is confined to S-phase, paralogs of the common histones, known as histone variants, are available to carry out functions throughout the cell cycle and accumulate in post-mitotic cells. Histone variants confer different structural properties on nucleosomes by wrapping more or less DNA or by altering nucleosome stability. They carry out specialized functions in DNA repair, chromosome segregation and regulation of transcription initiation, or perform tissue-specific roles. In this Cell Science at a Glance article and the accompanying poster, we briefly examine new insights into histone origins and discuss variants from each of the histone families, focusing on how structural differences may alter their functions.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Histonas
/
Nucleosomas
Idioma:
En
Revista:
J Cell Sci
Año:
2021
Tipo del documento:
Article
País de afiliación:
Estados Unidos