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Yorodumi- PDB-6uph: Structure of a Yeast Centromeric Nucleosome at 2.7 Angstrom resolution -
+Open data
-Basic information
Entry | Database: PDB / ID: 6uph | |||||||||
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Title | Structure of a Yeast Centromeric Nucleosome at 2.7 Angstrom resolution | |||||||||
Components |
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Keywords | CELL CYCLE / Histones / Nucleosome / Centromere / Kinetochore / Yeast | |||||||||
Function / homology | Function and homology information 2-micrometer circle DNA / 2-micrometer plasmid partitioning / centromeric DNA binding / kinetochore assembly / condensed chromosome, centromeric region / mitotic sister chromatid segregation / rRNA transcription / protein localization to CENP-A containing chromatin / CENP-A containing nucleosome / structural constituent of chromatin ...2-micrometer circle DNA / 2-micrometer plasmid partitioning / centromeric DNA binding / kinetochore assembly / condensed chromosome, centromeric region / mitotic sister chromatid segregation / rRNA transcription / protein localization to CENP-A containing chromatin / CENP-A containing nucleosome / structural constituent of chromatin / nucleosome / sequence-specific DNA binding / protein heterodimerization activity / DNA repair / DNA binding / nucleus Similarity search - Function | |||||||||
Biological species | Saccharomyces cerevisiae (brewer's yeast) Kluyveromyces lactis (yeast) unidentified (others) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.7 Å | |||||||||
Authors | Migl, D. / Kschonsak, M. / Arthur, C.P. / Khin, Y. / Harrison, S.C. / Ciferri, C. / Dimitrova, Y.N. | |||||||||
Funding support | United States, 2items
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Citation | Journal: Structure / Year: 2020 Title: Cryoelectron Microscopy Structure of a Yeast Centromeric Nucleosome at 2.7 Å Resolution. Authors: David Migl / Marc Kschonsak / Christopher P Arthur / Yadana Khin / Stephen C Harrison / Claudio Ciferri / Yoana N Dimitrova / Abstract: Kinetochores mediate chromosome segregation during cell division. They assemble on centromeric nucleosomes and capture spindle microtubules. In budding yeast, a kinetochore links a single nucleosome, ...Kinetochores mediate chromosome segregation during cell division. They assemble on centromeric nucleosomes and capture spindle microtubules. In budding yeast, a kinetochore links a single nucleosome, containing the histone variant Cse4 instead of H3, with a single microtubule. Conservation of most kinetochore components from yeast to metazoans suggests that the yeast kinetochore represents a module of the more complex metazoan arrangements. We describe here a streamlined protocol for reconstituting a yeast centromeric nucleosome and a systematic exploration of cryo-grid preparation. These developments allowed us to obtain a high-resolution cryoelectron microscopy reconstruction. As suggested by previous work, fewer base pairs are in tight association with the histone octamer than there are in canonical nucleosomes. Weak binding of the end DNA sequences may contribute to specific recognition by other inner kinetochore components. The centromeric nucleosome structure and the strategies we describe will facilitate studies of many other aspects of kinetochore assembly and chromatin biochemistry. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 6uph.cif.gz | 256.2 KB | Display | PDBx/mmCIF format |
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PDB format | pdb6uph.ent.gz | 191.5 KB | Display | PDB format |
PDBx/mmJSON format | 6uph.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/up/6uph ftp://data.pdbj.org/pub/pdb/validation_reports/up/6uph | HTTPS FTP |
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-Related structure data
Related structure data | 20839MC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
-Protein , 4 types, 8 molecules AEBFCGDH
#1: Protein | Mass: 26885.434 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (yeast) Strain: ATCC 204508 / S288c / Gene: CSE4, CSL2, YKL049C, YKL262 / Production host: Escherichia coli (E. coli) / References: UniProt: P36012 #2: Protein | Mass: 13332.434 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37) (yeast) Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: KLLA0_E08647g, KLLA0_E17601g / Production host: Escherichia coli (E. coli) / References: UniProt: Q6CMU6 #3: Protein | Mass: 15739.005 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37) (yeast) Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: HTA1, KLLA0E17413g, HTA2, KLLA0F13332g / Production host: Escherichia coli (E. coli) / References: UniProt: Q6CK59 #4: Protein | Mass: 16219.361 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37) (yeast) Strain: ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37 Gene: HTB1, KLLA0F13310g / Production host: Escherichia coli (E. coli) / References: UniProt: Q6CK60 |
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-DNA chain , 2 types, 2 molecules IJ
#5: DNA chain | Mass: 45138.770 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) unidentified (others) / Production host: Escherichia coli (E. coli) |
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#6: DNA chain | Mass: 45610.043 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) unidentified (others) / Production host: Escherichia coli (E. coli) |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
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Molecular weight | Value: 240 kDa/nm / Experimental value: NO | ||||||||||||||||||||||||||||||
Source (natural) |
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Source (recombinant) |
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Buffer solution | pH: 7.5 | ||||||||||||||||||||||||||||||
Specimen | Conc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||||
Specimen support | Grid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil, UltrAuFoil, R1.2/1.3 | ||||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy |
Image recording | Electron dose: 1.249 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-Processing
Software | Name: PHENIX / Version: 1.14_3260: / Classification: refinement | ||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 265380 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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