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- EMDB-5492: Reconstruction of the Ndc80 Bonsai Delta 40 Decorated Microtubule... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-5492 | |||||||||
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Title | Reconstruction of the Ndc80 Bonsai Delta 40 Decorated Microtubule on CCD for Difference Map Calculation | |||||||||
![]() | Reconstruction of 14 protofilament microtubule decorated with the Bonsai delta 40 mutant for difference map calculation. | |||||||||
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Biological species | ![]() ![]() ![]() ![]() ![]() | |||||||||
Method | helical reconstruction / ![]() | |||||||||
![]() | Alushin GM / Musinipally V / Matson D / Tooley J / Stukenberg PT / Nogales E | |||||||||
![]() | ![]() Title: Multimodal microtubule binding by the Ndc80 kinetochore complex. Authors: Gregory M Alushin / Vivek Musinipally / Daniel Matson / John Tooley / P Todd Stukenberg / Eva Nogales / ![]() Abstract: The Ndc80 complex is a key site of kinetochore-microtubule attachment during cell division. The human complex engages microtubules with a globular 'head' formed by tandem calponin-homology domains ...The Ndc80 complex is a key site of kinetochore-microtubule attachment during cell division. The human complex engages microtubules with a globular 'head' formed by tandem calponin-homology domains and an 80-amino-acid unstructured 'tail' that contains sites of phosphoregulation by the Aurora B kinase. Using biochemical, cell biological and electron microscopy analyses, we dissected the roles of the tail in binding of microtubules and mediation of cooperative interactions between Ndc80 complexes. Two segments of the tail that contain Aurora B phosphorylation sites become ordered at interfaces; one with tubulin and the second with an adjacent Ndc80 head on the microtubule surface, forming interactions that are disrupted by phosphorylation. We propose a model in which Ndc80's interaction with either growing or shrinking microtubule ends can be tuned by the phosphorylation state of its tail. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 1.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 12.9 KB 12.9 KB | Display Display | ![]() |
Images | ![]() | 254.9 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
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Links
EMDB pages | ![]() ![]() |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | Reconstruction of 14 protofilament microtubule decorated with the Bonsai delta 40 mutant for difference map calculation. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 2.74 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Human Ndc80 bonsai complex bound to the microtubule
Entire | Name: Human Ndc80 bonsai complex bound to the microtubule |
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Components |
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-Supramolecule #1000: Human Ndc80 bonsai complex bound to the microtubule
Supramolecule | Name: Human Ndc80 bonsai complex bound to the microtubule / type: sample / ID: 1000 Details: Ndc80 bonsai is a heterodimer of Ndc80-Spc25 and Nuf2-Spc24; tubulin is a heterodimer of alpha and beta tubulin Oligomeric state: 2 copies of the Ndc80 bonsai complex bind to each tubulin heterodimer Number unique components: 2 |
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Molecular weight | Theoretical: 260 KDa |
-Macromolecule #1: tubulin
Macromolecule | Name: tubulin / type: protein_or_peptide / ID: 1 / Name.synonym: tubulin / Number of copies: 1 / Oligomeric state: heterodimer / Recombinant expression: No / Database: NCBI |
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Source (natural) | Organism: ![]() ![]() ![]() |
Molecular weight | Theoretical: 110 KDa |
-Macromolecule #2: Ndc80-Spc25 Chimera
Macromolecule | Name: Ndc80-Spc25 Chimera / type: protein_or_peptide / ID: 2 Details: Chimera of Ndc80 residues 41-286 and Spc25 residues 118-224. The first 40 residues of Ndc80 have been deleted. Number of copies: 1 / Oligomeric state: heterodimer / Recombinant expression: Yes |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 45 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
-Macromolecule #3: Nuf2-Spc24 Chimera
Macromolecule | Name: Nuf2-Spc24 Chimera / type: protein_or_peptide / ID: 3 Details: Chimera of Nuf2 residues 1-169 and Spc24 residues 122-197 Number of copies: 1 / Oligomeric state: heterodimer / Recombinant expression: Yes |
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Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 29 KDa |
Recombinant expression | Organism: ![]() ![]() ![]() |
-Experimental details
-Structure determination
Method | ![]() |
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![]() | helical reconstruction |
Aggregation state | filament |
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Sample preparation
Concentration | 0.25 mg/mL |
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Buffer | pH: 6.8 Details: 80mM PIPES, 1mM MgCl2, 1mM EGTA, 1mM DTT, 0.05% Nonidet P-40, 20uM taxol |
Grid | Details: C-flat 1.2/1.3 |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK II Method: 2 uL of 0.25 mg/mL MTs applied to grid for 1 minute, 4 uL of 0.7 mg/mL Ndc80 bonsai added, manually blot 1 minute, another 4 uL of Ndc80 applied for 1 minute, 2 uL removed with pipettor, blot ...Method: 2 uL of 0.25 mg/mL MTs applied to grid for 1 minute, 4 uL of 0.7 mg/mL Ndc80 bonsai added, manually blot 1 minute, another 4 uL of Ndc80 applied for 1 minute, 2 uL removed with pipettor, blot for 2 seconds before plunging, 0 mm offset |
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Electron microscopy
Microscope | FEI TECNAI F20 |
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Electron beam | Acceleration voltage: 120 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Sample stage | Specimen holder: side-entry / Specimen holder model: GATAN LIQUID NITROGEN |
Alignment procedure | Legacy - Astigmatism: objective lens astigmatism corrected at 100Kx mag |
Date | Sep 22, 2011 |
Image recording | Category: CCD / Film or detector model: GATAN ULTRASCAN 4000 (4k x 4k) / Digitization - Sampling interval: 15 µm / Number real images: 153 / Average electron dose: 20 e/Å2 |
Experimental equipment | ![]() Model: Tecnai F20 / Image courtesy: FEI Company |
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Image processing
CTF correction | Details: Phase-flipping each image |
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Final reconstruction | Applied symmetry - Helical parameters - Δz: 8.92979 Å Applied symmetry - Helical parameters - Δ&Phi: 25.76198 ° Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 13.0 Å / Resolution method: FSC 0.5 CUT-OFF / Software - Name: EMAN2/SPARX Details: Particles were aligned using multi-model IHRSR protocol in EMAN2/SPARX with naked 13 and 14 protofilament microtubules as references. The deposited map is a segmented region for difference ...Details: Particles were aligned using multi-model IHRSR protocol in EMAN2/SPARX with naked 13 and 14 protofilament microtubules as references. The deposited map is a segmented region for difference map calculation. No amplitude scaling was applied. |
Details | The phase-flipped particles were aligned using IHRSR in EMAN2/SPARX. |