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Purified Smc5/6 Complex Exhibits DNA Substrate Recognition and Compaction
- Source :
- Molecular Cell, Recercat. Dipósit de la Recerca de Catalunya, instname, Recercat: Dipósit de la Recerca de Catalunya, Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya), Gutierrez-Escribano, P, Hormeño, S, Madariaga-Marcos, J, Solé-Soler, R, O’Reilly, F J, Morris, K, Aicart-Ramos, C, Aramayo, R, Montoya, A, Kramer, H, Rappsilber, J, Torres-Rosell, J, Moreno-Herrero, F & Aragon, L 2020, ' Purified Smc5/6 complex exhibits DNA substrate recognition and compaction ', Molecular Cell, vol. 80, no. 6, pp. 1039-1054.e6 . https://doi.org/10.1016/j.molcel.2020.11.012, Digital.CSIC. Repositorio Institucional del CSIC, Repositorio Abierto de la UdL, Universitad de Lleida
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Summary Eukaryotic SMC complexes, cohesin, condensin, and Smc5/6, use ATP hydrolysis to power a plethora of functions requiring organization and restructuring of eukaryotic chromosomes in interphase and during mitosis. The Smc5/6 mechanism of action and its activity on DNA are largely unknown. Here we purified the budding yeast Smc5/6 holocomplex and characterized its core biochemical and biophysical activities. Purified Smc5/6 exhibits DNA-dependent ATP hydrolysis and SUMO E3 ligase activity. We show that Smc5/6 binds DNA topologically with affinity for supercoiled and catenated DNA templates. Employing single-molecule assays to analyze the functional and dynamic characteristics of Smc5/6 bound to DNA, we show that Smc5/6 locks DNA plectonemes and can compact DNA in an ATP-dependent manner. These results demonstrate that the Smc5/6 complex recognizes DNA tertiary structures involving juxtaposed helices and might modulate DNA topology by plectoneme stabilization and local compaction.<br />Graphical Abstract<br />Highlights • Purification of enzymatically active Smc5/6 yeast holocomplex • Smc5/6 coiled-coils exhibit a folded conformation • Smc5/6 stabilizes DNA plectonemes • Smc5/6 compacts DNA against low forces in an ATP-dependent manner<br />Gutierrez-Escribano et al. purify the entire Smc5/6 holocomplex, retaining full enzymatic function. The Smc5/6 complex compacts DNA against low force and stabilizes DNA crosses present in supercoiled and catenated DNA. These findings indicate that many Smc5/6 functions occur through stabilization of DNA tertiary structure.
- Subjects :
- Saccharomyces cerevisiae Proteins
Smc5/6 purification
DNA substrate recognition
Chromosomal Proteins, Non-Histone
Condensin
Mitosis
Cell Cycle Proteins
Saccharomyces cerevisiae
Smc5/6 holocomplex
Article
Biophysical Phenomena
03 medical and health sciences
chemistry.chemical_compound
electron mmicroscopy
0302 clinical medicine
ATP hydrolysis
Electron microscopy
Humans
Interphase
Molecular Biology
030304 developmental biology
Adenosine Triphosphatases
Magnetic tweezers
0303 health sciences
DNA compaction
Cohesin
biology
Sumoylation
Single-molecule
Cell Biology
Electron mmicroscopy
Ubiquitin ligase
DNA-Binding Proteins
chemistry
Multiprotein Complexes
Eukaryotic chromosome fine structure
Biophysics
biology.protein
Plectoneme stabilisation
030217 neurology & neurosurgery
DNA
Subjects
Details
- ISSN :
- 10972765
- Volume :
- 80
- Database :
- OpenAIRE
- Journal :
- Molecular Cell
- Accession number :
- edsair.doi.dedup.....0a646f4a6f60fc03ec5e179a128ebfc9