Interaction between TBP and Condensin Drives the Organization and Faithful Segregation of Mitotic Chromosomes.
Mol Cell
; 59(5): 755-67, 2015 Sep 03.
Article
em En
| MEDLINE
| ID: mdl-26257282
ABSTRACT
Genome/chromosome organization is highly ordered and controls various nuclear events, although the molecular mechanisms underlying the functional organization remain largely unknown. Here, we show that the TATA box-binding protein (TBP) interacts with the Cnd2 kleisin subunit of condensin to mediate interphase and mitotic chromosomal organization in fission yeast. TBP recruits condensin onto RNA polymerase III-transcribed (Pol III) genes and highly transcribed Pol II genes; condensin in turn associates these genes with centromeres. Inhibition of the Cnd2-TBP interaction disrupts condensin localization across the genome and the proper assembly of mitotic chromosomes, leading to severe defects in chromosome segregation and eventually causing cellular lethality. We propose that the Cnd2-TBP interaction coordinates transcription with chromosomal architecture by linking dispersed gene loci with centromeres. This chromosome arrangement can contribute to the efficient transmission of physical force at the kinetochore to chromosomal arms, thereby supporting the fidelity of chromosome segregation.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Schizosaccharomyces
/
Proteínas de Ciclo Celular
/
Proteínas de Schizosaccharomyces pombe
/
Proteína de Ligação a TATA-Box
Idioma:
En
Revista:
Mol Cell
Assunto da revista:
BIOLOGIA MOLECULAR
Ano de publicação:
2015
Tipo de documento:
Article
País de afiliação:
Estados Unidos