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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-21073 | |||||||||
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| Title | Structure of the native human gamma-tubulin ring complex | |||||||||
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Keywords | Tubulin / gamma-tubulin / gamma-tubulin ring complex / gTuRC / g-TuRC / GCP / GCP2 / GCP3 / GCP4 / GCP5 / GCP6 / microtubule / microtubule nucleation / single particle cryo-EM structure / STRUCTURAL PROTEIN | |||||||||
| Function / homology | Function and homology informationmicrotubule nucleator activity / polar microtubule / gamma-tubulin complex / gamma-tubulin ring complex / mitotic spindle microtubule / meiotic spindle organization / microtubule nucleation / gamma-tubulin binding / non-motile cilium / pericentriolar material ...microtubule nucleator activity / polar microtubule / gamma-tubulin complex / gamma-tubulin ring complex / mitotic spindle microtubule / meiotic spindle organization / microtubule nucleation / gamma-tubulin binding / non-motile cilium / pericentriolar material / cell leading edge / microtubule organizing center / mitotic sister chromatid segregation / single fertilization / spindle assembly / cytoplasmic microtubule / cytoplasmic microtubule organization / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / centriole / 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 / condensed nuclear chromosome / mitotic spindle organization / meiotic cell cycle / brain development / recycling endosome / structural constituent of cytoskeleton / microtubule cytoskeleton organization / spindle / neuron migration / apical part of cell / spindle pole / Regulation of PLK1 Activity at G2/M Transition / mitotic cell cycle / microtubule cytoskeleton / protein-containing complex assembly / microtubule binding / microtubule / neuron projection / cilium / ciliary basal body / centrosome / GTP binding / structural molecule activity / nucleoplasm / identical protein binding / nucleus / membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 4.3 Å | |||||||||
Authors | Wieczorek M / Urnavicius L | |||||||||
| Funding support | United States, France, 2 items
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Citation | Journal: Cell / Year: 2020Title: Asymmetric Molecular Architecture of the Human γ-Tubulin Ring Complex. Authors: Michal Wieczorek / Linas Urnavicius / Shih-Chieh Ti / Kelly R Molloy / Brian T Chait / Tarun M Kapoor / ![]() Abstract: The γ-tubulin ring complex (γ-TuRC) is an essential regulator of centrosomal and acentrosomal microtubule formation, yet its structure is not known. Here, we present a cryo-EM reconstruction of the ...The γ-tubulin ring complex (γ-TuRC) is an essential regulator of centrosomal and acentrosomal microtubule formation, yet its structure is not known. Here, we present a cryo-EM reconstruction of the native human γ-TuRC at ∼3.8 Å resolution, revealing an asymmetric, cone-shaped structure. Pseudo-atomic models indicate that GCP4, GCP5, and GCP6 form distinct Y-shaped assemblies that structurally mimic GCP2/GCP3 subcomplexes distal to the γ-TuRC "seam." We also identify an unanticipated structural bridge that includes an actin-like protein and spans the γ-TuRC lumen. Despite its asymmetric architecture, the γ-TuRC arranges γ-tubulins into a helical geometry poised to nucleate microtubules. Diversity in the γ-TuRC subunits introduces large (>100,000 Å) surfaces in the complex that allow for interactions with different regulatory factors. The observed compositional complexity of the γ-TuRC could self-regulate its assembly into a cone-shaped structure to control microtubule formation across diverse contexts, e.g., within biological condensates or alongside existing filaments. | |||||||||
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Structure visualization
| Movie |
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_21073.map.gz | 177.6 MB | EMDB map data format | |
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| Header (meta data) | emd-21073-v30.xml emd-21073.xml | 26.3 KB 26.3 KB | Display Display | EMDB header |
| Images | emd_21073.png | 56.5 KB | ||
| Filedesc metadata | emd-21073.cif.gz | 9.4 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-21073 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-21073 | HTTPS FTP |
-Validation report
| Summary document | emd_21073_validation.pdf.gz | 576.8 KB | Display | EMDB validaton report |
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| Full document | emd_21073_full_validation.pdf.gz | 576.4 KB | Display | |
| Data in XML | emd_21073_validation.xml.gz | 6.8 KB | Display | |
| Data in CIF | emd_21073_validation.cif.gz | 7.7 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-21073 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-21073 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 6v6sMC ![]() 6v5vC ![]() 6v69C ![]() 6v6bC ![]() 6v6cC 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 | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_21073.map.gz / Format: CCP4 / Size: 190.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.335 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 : Native human gamma-tubulin ring complex
+Supramolecule #1: Native human gamma-tubulin ring complex
+Macromolecule #1: Gamma-tubulin complex component 2
+Macromolecule #2: Gamma-tubulin complex component 3
+Macromolecule #3: Gamma-tubulin complex component 4
+Macromolecule #4: Gamma-tubulin complex component 5
+Macromolecule #5: Gamma-tubulin complex component 6
+Macromolecule #6: Unassigned poly-alanine chain ("staple")
+Macromolecule #7: beta actin
+Macromolecule #8: Unassigned poly-alanine model ("CC")
+Macromolecule #9: Unassigned poly-alanine model ("HB")
+Macromolecule #10: Unassigned poly-alanine model ("Lumenal bridge helical bundles")
+Macromolecule #11: Tubulin gamma-1 chain
+Macromolecule #12: ADENOSINE-5'-DIPHOSPHATE
+Macromolecule #13: GUANOSINE-5'-DIPHOSPHATE
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Buffer | pH: 7.5 |
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| 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 K2 SUMMIT (4k x 4k) / Average electron dose: 45.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
| Startup model | Type of model: OTHER / Details: Relion 3.0 initial model generation |
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| Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 4.3 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 103172 |
| Initial angle assignment | Type: OTHER / Details: Relion 3.0 |
| Final angle assignment | Type: OTHER / Details: Relion 3.0 |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
United States,
France, 2 items
Citation
UCSF Chimera




















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