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Establishment of DNA-DNA Interactions by the Cohesin Ring
- Source :
- Cell
- Publication Year :
- 2018
- Publisher :
- Elsevier, 2018.
-
Abstract
- Summary The ring-shaped structural maintenance of chromosome (SMC) complexes are multi-subunit ATPases that topologically encircle DNA. SMC rings make vital contributions to numerous chromosomal functions, including mitotic chromosome condensation, sister chromatid cohesion, DNA repair, and transcriptional regulation. They are thought to do so by establishing interactions between more than one DNA. Here, we demonstrate DNA-DNA tethering by the purified fission yeast cohesin complex. DNA-bound cohesin efficiently and topologically captures a second DNA, but only if that is single-stranded DNA (ssDNA). Like initial double-stranded DNA (dsDNA) embrace, second ssDNA capture is ATP-dependent, and it strictly requires the cohesin loader complex. Second-ssDNA capture is relatively labile but is converted into stable dsDNA-dsDNA cohesion through DNA synthesis. Our study illustrates second-DNA capture by an SMC complex and provides a molecular model for the establishment of sister chromatid cohesion.<br />Graphical Abstract<br />Highlights • The recombinant cohesin complex mediates DNA-DNA interactions • Second-DNA capture by cohesin requires ssDNA • DNA replication stabilizes second-strand capture • Second-DNA capture at a replication fork could establish sister chromatid cohesion<br />Cohesin sets up the initial steps of chromosome cohesion by anchoring single-stranded DNA along to a region of duplex DNA.
- Subjects :
- DNA Replication
0301 basic medicine
Saccharomyces cerevisiae Proteins
S. pombe
Cohesin complex
Chromosomal Proteins, Non-Histone
DNA repair
Cell Cycle Proteins
Saccharomyces cerevisiae
Chromatids
Biology
Article
General Biochemistry, Genetics and Molecular Biology
Mitotic chromosome condensation
03 medical and health sciences
chemistry.chemical_compound
Adenosine Triphosphate
second-DNA capture
Schizosaccharomyces
Cohesin
DNA synthesis
Chromosome
DNA
SMC complexes
Cell biology
sister chromatid cohesion
Establishment of sister chromatid cohesion
030104 developmental biology
chemistry
MC complexes
biological phenomena, cell phenomena, and immunity
Subjects
Details
- Language :
- English
- Volume :
- 172
- Issue :
- No. 3
- Database :
- OpenAIRE
- Journal :
- セル
- Accession number :
- edsair.doi.dedup.....e994b1908ecfaeaa778d94ae928591d6