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- EMDB-14014: Structure of recombinant human gamma-Tubulin Ring Complex 10-spok... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-14014 | |||||||||
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Title | Structure of recombinant human gamma-Tubulin Ring Complex 10-spoked assembly intermediate (spokes 3-12, homogeneous dataset) | |||||||||
![]() | 10-spoked assembly intermediates of the gamma-Tubulin Ring Complex (spokes 3-12 homogeneous dataset) | |||||||||
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![]() | Assembly / Intermediate / Complex / CYTOSOLIC PROTEIN | |||||||||
Function / homology | ![]() microtubule nucleation by interphase microtubule organizing center / gamma-tubulin complex localization / equatorial microtubule organizing center / gamma-tubulin ring complex / polar microtubule / interphase microtubule organizing center / gamma-tubulin complex / mitotic spindle microtubule / meiotic spindle organization / microtubule nucleation ...microtubule nucleation by interphase microtubule organizing center / gamma-tubulin complex localization / equatorial microtubule organizing center / gamma-tubulin ring complex / polar microtubule / interphase microtubule organizing center / gamma-tubulin complex / mitotic spindle microtubule / meiotic spindle organization / microtubule nucleation / gamma-tubulin binding / non-motile cilium / microtubule organizing center / pericentriolar material / cytoplasmic microtubule / cell leading edge / mitotic sister chromatid segregation / mitotic spindle assembly / single fertilization / spindle assembly / cytoplasmic microtubule organization / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of mitotic centrosome proteins and complexes / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane / AURKA Activation by TPX2 / centriole / mitotic spindle organization / ciliary basal body / condensed nuclear chromosome / meiotic cell cycle / neuron migration / brain development / recycling endosome / structural constituent of cytoskeleton / microtubule cytoskeleton organization / spindle pole / spindle / microtubule cytoskeleton / Regulation of PLK1 Activity at G2/M Transition / apical part of cell / mitotic cell cycle / protein-containing complex assembly / microtubule binding / microtubule / neuron projection / centrosome / GTP binding / structural molecule activity / nucleoplasm / identical protein binding / nucleus / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 8.1 Å | |||||||||
![]() | Zupa E / Pfeffer S | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Modular assembly of the principal microtubule nucleator γ-TuRC. Authors: Martin Würtz / Erik Zupa / Enrico S Atorino / Annett Neuner / Anna Böhler / Ariani S Rahadian / Bram J A Vermeulen / Giulia Tonon / Sebastian Eustermann / Elmar Schiebel / Stefan Pfeffer / ![]() Abstract: The gamma-tubulin ring complex (γ-TuRC) is the principal microtubule nucleation template in vertebrates. Recent cryo-EM reconstructions visualized the intricate quaternary structure of the γ-TuRC, ...The gamma-tubulin ring complex (γ-TuRC) is the principal microtubule nucleation template in vertebrates. Recent cryo-EM reconstructions visualized the intricate quaternary structure of the γ-TuRC, containing more than thirty subunits, raising fundamental questions about γ-TuRC assembly and the role of actin as an integral part of the complex. Here, we reveal the structural mechanism underlying modular γ-TuRC assembly and identify a functional role of actin in microtubule nucleation. During γ-TuRC assembly, a GCP6-stabilized core comprising GCP2-3-4-5-4-6 is expanded by stepwise recruitment, selective stabilization and conformational locking of four pre-formed GCP2-GCP3 units. Formation of the lumenal bridge specifies incorporation of the terminal GCP2-GCP3 unit and thereby leads to closure of the γ-TuRC ring in a left-handed spiral configuration. Actin incorporation into the complex is not relevant for γ-TuRC assembly and structural integrity, but determines γ-TuRC geometry and is required for efficient microtubule nucleation and mitotic chromosome alignment in vivo. | |||||||||
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 | ![]() | 3.9 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 28.7 KB 28.7 KB | Display Display | ![]() |
Images | ![]() | 98.4 KB | ||
Filedesc metadata | ![]() | 10.1 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 404.9 KB | Display | ![]() |
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Full document | ![]() | 404.5 KB | Display | |
Data in XML | ![]() | 5.8 KB | Display | |
Data in CIF | ![]() | 6.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7qj9MC ![]() 7qj0C ![]() 7qj1C ![]() 7qj2C ![]() 7qj3C ![]() 7qj4C ![]() 7qj5C ![]() 7qj6C ![]() 7qj7C ![]() 7qj8C ![]() 7qjaC ![]() 7qjbC ![]() 7qjcC ![]() 7qjdC ![]() 7qjeC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | 10-spoked assembly intermediates of the gamma-Tubulin Ring Complex (spokes 3-12 homogeneous dataset) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 2.66 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 : Recombinant human Gamma-Tubulin Ring Complex
+Supramolecule #1: Recombinant human Gamma-Tubulin Ring Complex
+Macromolecule #1: Gamma-tubulin complex component 5
+Macromolecule #2: actin, cytoplasmic 1
+Macromolecule #3: Mitotic-spindle organizing protein 1
+Macromolecule #4: Gamma-tubulin complex component 3
+Macromolecule #5: Gamma-tubulin complex component 2
+Macromolecule #6: Gamma-tubulin complex component 4
+Macromolecule #7: Gamma-tubulin complex component 6
+Macromolecule #8: Tubulin gamma-1 chain
+Macromolecule #9: water
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Grid | Model: Quantifoil R2/1 / Material: COPPER / Mesh: 200 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: OTHER |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 6127 / Average electron dose: 35.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.5 µm / Nominal defocus min: 2.0 µm |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Initial model |
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Refinement | Space: REAL / Protocol: FLEXIBLE FIT | ||||||||||||||||||||
Output model | ![]() PDB-7qj9: |