[English] 日本語
![](img/lk-miru.gif)
- PDB-6v6b: Structures of GCP2 and GCP3 in the native human gamma-tubulin rin... -
+
Open data
-
Basic information
Entry | Database: PDB / ID: 6v6b | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | Structures of GCP2 and GCP3 in the native human gamma-tubulin ring complex | |||||||||
![]() |
| |||||||||
![]() | STRUCTURAL PROTEIN / GCP / GCP2 / GCP3 / gamma-TuSC / gTuSC / gamma-tubulin ring complex / gTuRC / g-TuRC / microtubule / microtubule nucleation / single particle cryo-EM structure | |||||||||
Function / homology | ![]() equatorial microtubule organizing center / microtubule minus-end binding / polar microtubule / gamma-tubulin complex / microtubule nucleation / gamma-tubulin binding / microtubule organizing center / cytoplasmic microtubule / single fertilization / spindle assembly ...equatorial microtubule organizing center / microtubule minus-end binding / polar microtubule / gamma-tubulin complex / microtubule nucleation / gamma-tubulin binding / microtubule organizing center / cytoplasmic microtubule / single fertilization / spindle assembly / cytoplasmic microtubule organization / Recruitment of mitotic centrosome proteins and complexes / Recruitment of NuMA to mitotic centrosomes / centriole / meiotic cell cycle / neuron migration / brain development / structural constituent of cytoskeleton / spindle pole / spindle / mitotic cell cycle / protein-containing complex assembly / centrosome / structural molecule activity / nucleoplasm / membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
![]() | Wieczorek, M. / Urnavicius, L. / Ti, S. / Molloy, K.R. / Chait, B.T. / Kapoor, T.M. | |||||||||
Funding support | ![]() ![]()
| |||||||||
![]() | ![]() Title: 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. | |||||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | Molecule: ![]() ![]() |
-
Downloads & links
-
Download
PDBx/mmCIF format | ![]() | 222.8 KB | Display | ![]() |
---|---|---|---|---|
PDB format | ![]() | 169.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 681.8 KB | Display | ![]() |
---|---|---|---|---|
Full document | ![]() | 689.4 KB | Display | |
Data in XML | ![]() | 34.1 KB | Display | |
Data in CIF | ![]() | 51.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 21067MC ![]() 6v5vC ![]() 6v69C ![]() 6v6cC ![]() 6v6sC M: map data used to model this data C: citing same article ( |
---|---|
Similar structure data |
-
Links
-
Assembly
Deposited unit | ![]()
|
---|---|
1 |
|
-
Components
#1: Protein | Mass: 103710.102 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
---|---|
#2: Protein | Mass: 105765.719 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
---|---|
EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-
Sample preparation
Component | Name: Native human gamma-tubulin ring complex / Type: COMPLEX / Entity ID: all / Source: NATURAL |
---|---|
Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
-
Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
---|---|
Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 45 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-
Processing
Software | Name: PHENIX / Version: 1.16_3549: / Classification: refinement | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 351714 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
|