Identification of a BET family bromodomain/casein kinase II/TAF-containing complex as a regulator of mitotic condensin function.
Cell Rep
; 6(5): 892-905, 2014 Mar 13.
Article
en En
| MEDLINE
| ID: mdl-24565511
ABSTRACT
Condensin is a central regulator of mitotic genome structure with mutants showing poorly condensed chromosomes and profound segregation defects. Here, we identify NCT, a complex comprising the Nrc1 BET-family tandem bromodomain protein (SPAC631.02), casein kinase II (CKII), and several TAFs, as a regulator of condensin function. We show that NCT and condensin bind similar genomic regions but only briefly colocalize during the periods of chromosome condensation and decondensation. This pattern of NCT binding at the core centromere, the region of maximal condensin enrichment, tracks the abundance of acetylated histone H4, as regulated by the Hat1-Mis16 acetyltransferase complex and recognized by the first Nrc1 bromodomain. Strikingly, mutants in NCT or Hat1-Mis16 restore the formation of segregation-competent chromosomes in cells containing defective condensin. These results are consistent with a model where NCT targets CKII to chromatin in a cell-cycle-directed manner in order to modulate the activity of condensin during chromosome condensation and decondensation.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Proteínas Nucleares
/
Cromatina
/
Proteínas de Unión al ARN
/
Adenosina Trifosfatasas
/
Complejos Multiproteicos
/
Quinasa de la Caseína II
/
Proteínas de Unión al ADN
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
Cell Rep
Año:
2014
Tipo del documento:
Article
País de afiliación:
Estados Unidos