Human Condensin I and II Drive Extensive ATP-Dependent Compaction of Nucleosome-Bound DNA.
Mol Cell
; 79(1): 99-114.e9, 2020 07 02.
Article
em En
| MEDLINE
| ID: mdl-32445620
ABSTRACT
Structural maintenance of chromosomes (SMC) complexes are essential for genome organization from bacteria to humans, but their mechanisms of action remain poorly understood. Here, we characterize human SMC complexes condensin I and II and unveil the architecture of the human condensin II complex, revealing two putative DNA-entrapment sites. Using single-molecule imaging, we demonstrate that both condensin I and II exhibit ATP-dependent motor activity and promote extensive and reversible compaction of double-stranded DNA. Nucleosomes are incorporated into DNA loops during compaction without being displaced from the DNA, indicating that condensin complexes can readily act upon nucleosome-bound DNA molecules. These observations shed light on critical processes involved in genome organization in human cells.
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Base de dados:
MEDLINE
Assunto principal:
DNA
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Nucleossomos
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Trifosfato de Adenosina
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Adenosina Trifosfatases
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Complexos Multiproteicos
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Proteínas de Ligação a DNA
Limite:
Humans
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article