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- PDB-7qj0: Structure of recombinant human gamma-Tubulin Ring Complex 6-spoke... -

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Basic information

Entry
Database: PDB / ID: 7qj0
TitleStructure of recombinant human gamma-Tubulin Ring Complex 6-spoked assembly intermediate (spokes 7-12)
Components
  • (Gamma-tubulin complex component ...) x 5
  • Mitotic-spindle organizing protein 1
  • Tubulin gamma-1 chain
KeywordsCYTOSOLIC PROTEIN / Assembly / Intermediate / Complex
Function / homology
Function and homology information


microtubule nucleation by interphase microtubule organizing center / gamma-tubulin complex localization / microtubule nucleator activity / polar microtubule / interphase microtubule organizing center / gamma-tubulin complex / gamma-tubulin ring complex / mitotic spindle microtubule / meiotic spindle organization / microtubule nucleation ...microtubule nucleation by interphase microtubule organizing center / gamma-tubulin complex localization / microtubule nucleator activity / polar microtubule / interphase microtubule organizing center / 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 / mitotic spindle assembly / single fertilization / cytoplasmic microtubule / spindle assembly / cytoplasmic microtubule organization / centriole / 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 / 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 / cytosol / cytoplasm
Similarity search - Function
Mitotic-spindle organizing protein 1 / Mitotic-spindle organizing gamma-tubulin ring associated / Gamma-tubulin complex component 6, N-terminal / Gamma-tubulin complex component 6 N-terminus / Gamma tubulin / Gamma tubulin complex component, C-terminal / Gamma-tubulin complex component, C-terminal domain superfamily / Gamma tubulin complex component C-terminal / Gamma-tubulin complex component protein / Gamma tubulin complex component protein, N-terminal ...Mitotic-spindle organizing protein 1 / Mitotic-spindle organizing gamma-tubulin ring associated / Gamma-tubulin complex component 6, N-terminal / Gamma-tubulin complex component 6 N-terminus / Gamma tubulin / Gamma tubulin complex component, C-terminal / Gamma-tubulin complex component, C-terminal domain superfamily / Gamma tubulin complex component C-terminal / Gamma-tubulin complex component protein / Gamma tubulin complex component protein, N-terminal / Gamma tubulin complex component N-terminal / Tubulin / Tubulin, C-terminal / Tubulin C-terminal domain / Tubulin, conserved site / Tubulin subunits alpha, beta, and gamma signature. / Tubulin/FtsZ family, C-terminal domain / Tubulin/FtsZ-like, C-terminal domain / Tubulin/FtsZ, C-terminal / Tubulin/FtsZ, 2-layer sandwich domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ, GTPase domain / Tubulin/FtsZ, GTPase domain superfamily
Similarity search - Domain/homology
Tubulin gamma-1 chain / Mitotic-spindle organizing protein 1 / Gamma-tubulin complex component 3 / Gamma-tubulin complex component 6 / Gamma-tubulin complex component 5 / Gamma-tubulin complex component 2 / Gamma-tubulin complex component 4
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 5.32 Å
AuthorsZupa, E. / Pfeffer, S.
Funding support Germany, 2items
OrganizationGrant numberCountry
German Research Foundation (DFG)PF 963/1-4 Germany
German Research Foundation (DFG)Schi 295/4-4 Germany
CitationJournal: Nat Commun / Year: 2022
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
DepositionDec 16, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jan 26, 2022Provider: repository / Type: Initial release
Revision 1.1Feb 9, 2022Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.name
Revision 1.2Jul 17, 2024Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / em_3d_fitting_list / em_admin / pdbx_initial_refinement_model
Item: _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id ..._em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type / _em_admin.last_update

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Structure visualization

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  • Deposited structure unit
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  • EMDB-14005
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Structure viewerMolecule:
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Assembly

Deposited unit
m: Mitotic-spindle organizing protein 1
a: Gamma-tubulin complex component 3
b: Mitotic-spindle organizing protein 1
l: Gamma-tubulin complex component 5
G: Gamma-tubulin complex component 2
H: Gamma-tubulin complex component 3
I: Gamma-tubulin complex component 4
J: Gamma-tubulin complex component 5
K: Gamma-tubulin complex component 4
L: Gamma-tubulin complex component 6
U: Tubulin gamma-1 chain
V: Tubulin gamma-1 chain
W: Tubulin gamma-1 chain
X: Tubulin gamma-1 chain
Y: Tubulin gamma-1 chain
Z: Tubulin gamma-1 chain


Theoretical massNumber of molelcules
Total (without water)1,224,45416
Polymers1,224,45416
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 2 types, 8 molecules mbUVWXYZ

#1: Protein Mitotic-spindle organizing protein 1 / Mitotic-spindle organizing protein associated with a ring of gamma-tubulin 1


Mass: 8485.724 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: MZT1, C13orf37, MOZART1
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: Q08AG7
#7: Protein
Tubulin gamma-1 chain / Gamma-1-tubulin / Gamma-tubulin complex component 1 / GCP-1


Mass: 51227.770 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TUBG1, TUBG
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: P23258

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Gamma-tubulin complex component ... , 5 types, 8 molecules aHlJGIKL

#2: Protein Gamma-tubulin complex component 3 / hGCP3 / Gamma-ring complex protein 104 kDa / hGrip104 / Spindle pole body protein Spc98 homolog / hSpc98


Mass: 103710.102 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TUBGCP3, GCP3
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: Q96CW5
#3: Protein Gamma-tubulin complex component 5 / GCP-5


Mass: 118467.547 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TUBGCP5, GCP5, KIAA1899
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: Q96RT8
#4: Protein Gamma-tubulin complex component 2 / hGCP2 / Gamma-ring complex protein 103 kDa / hGrip103 / Spindle pole body protein Spc97 homolog / hSpc97


Mass: 102666.953 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TUBGCP2, GCP2
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: Q9BSJ2
#5: Protein Gamma-tubulin complex component 4 / hGCP4 / Gamma-ring complex protein 76 kDa / hGrip76


Mass: 76179.969 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TUBGCP4, 76P, GCP4
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: Q9UGJ1
#6: Protein Gamma-tubulin complex component 6 / GCP-6


Mass: 200733.641 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TUBGCP6, GCP6, KIAA1669
Production host: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
References: UniProt: Q96RT7

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Recombinant human Gamma-Tubulin Ring Complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 1.0 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera aff. frugiperda 1 BOLD-2017 (butterflies/moths)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R2/1
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 2000 nm / Cs: 2.7 mm
Image recordingElectron dose: 35 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 6127

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Processing

SoftwareName: PHENIX / Version: dev_3699: / Classification: refinement
EM software
IDNameVersionCategory
1Topaz0.2.4particle selection
2EPU2.6image acquisition
4Gctf1.06CTF correction
7NAMDmodel fitting
8VMDmodel fitting
10PHENIXmodel refinement
11RELION3.1initial Euler assignment
12RELION3final Euler assignment
13RELION3.1classification
14RELION33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 436887
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 5.32 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 92149 / Num. of class averages: 2 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model building

3D fitting-ID: 1 / Source name: PDB / Type: experimental model

IDPDB-IDPdb chain-IDAccession codeInitial refinement model-ID
17AS4

7as4

A7AS41
27AS4

7as4

B7AS41
37AS4

7as4

K7AS41
47AS4

7as4

O7AS41
57AS4

7as4

77AS41
66V6S

6v6s

J6V6S2
76V6S

6v6s

L6V6S2
86L81

6l81

6L813
96X0U

6x0u

6X0U4
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00752048
ELECTRON MICROSCOPYf_angle_d1.11670465
ELECTRON MICROSCOPYf_dihedral_angle_d21.4257266
ELECTRON MICROSCOPYf_chiral_restr0.0567943
ELECTRON MICROSCOPYf_plane_restr0.0079025

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