Condensin- and Replication-Mediated Bacterial Chromosome Folding and Origin Condensation Revealed by Hi-C and Super-resolution Imaging.
Mol Cell
; 59(4): 588-602, 2015 Aug 20.
Article
en En
| MEDLINE
| ID: mdl-26295962
ABSTRACT
Chromosomes of a broad range of species, from bacteria to mammals, are structured by large topological domains whose precise functional roles and regulatory mechanisms remain elusive. Here, we combine super-resolution microscopies and chromosome-capture technologies to unravel the higher-order organization of the Bacillus subtilis chromosome and its dynamic rearrangements during the cell cycle. We decipher the fine 3D architecture of the origin domain, revealing folding motifs regulated by condensin-like complexes. This organization, along with global folding throughout the genome, is present before replication, disrupted by active DNA replication, and re-established thereafter. Single-cell analysis revealed a strict correspondence between sub-cellular localization of origin domains and their condensation state. Our results suggest that the precise 3D folding pattern of the origin domain plays a role in the regulation of replication initiation, chromosome organization, and DNA segregation.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Bacillus subtilis
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Proteínas Bacterianas
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Adenosina Trifosfatasas
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Complejos Multiproteicos
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Proteínas de Unión al ADN
Idioma:
En
Revista:
Mol Cell
Asunto de la revista:
BIOLOGIA MOLECULAR
Año:
2015
Tipo del documento:
Article
País de afiliación:
Francia