7QJ4

Structure of recombinant human gamma-Tubulin Ring Complex 10-spoked assembly intermediate (spokes 5-14)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Modular assembly of the principal microtubule nucleator gamma-TuRC.

Wurtz, M., Zupa, E., Atorino, E.S., Neuner, A., Bohler, A., Rahadian, A.S., Vermeulen, B.J.A., Tonon, G., Eustermann, S., Schiebel, E., Pfeffer, S.

(2022) Nat Commun 13: 473-473

  • DOI: https://doi.org/10.1038/s41467-022-28079-0
  • Primary Citation of Related Structures:  
    7QJ0, 7QJ1, 7QJ2, 7QJ3, 7QJ4, 7QJ5, 7QJ6, 7QJ7, 7QJ8, 7QJ9, 7QJA, 7QJB, 7QJC, 7QJD, 7QJE

  • PubMed 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, containing more than thirty subunits, raising fundamental questions about γ-TuRC assembly and the role of actin as an integral part of the complex ...

    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.

    Organizational Affiliation: 

    Zentrum für Molekulare Biologie der Universität Heidelberg, DKFZ-ZMBH Allianz, Im Neuenheimer Feld 282, 69120, Heidelberg, Germany. s.pfeffer@zmbh.uni-heidelberg.de.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin gamma-1 chain451Homo sapiensMutation(s): 0 
Gene Names: TUBG1, TUBG
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PHAROS:  P23258
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UniProt GroupP23258
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 5C [auth l],
L [auth J]		1,024Homo sapiensMutation(s): 0 
Gene Names: TUBGCP5, GCP5, KIAA1899
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 3907Homo sapiensMutation(s): 0 
Gene Names: TUBGCP3, GCP3
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Mitotic-spindle organizing protein 1E [auth o],
F [auth m],
Q [auth k],
R [auth b]		82Homo sapiensMutation(s): 0 
Gene Names: MZT1, C13orf37, MOZART1
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 2G [auth E],
I [auth G],
O [auth M]		902Homo sapiensMutation(s): 0 
Gene Names: TUBGCP2, GCP2
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 4K [auth I],
M [auth K]		667Homo sapiensMutation(s): 0 
Gene Names: TUBGCP4, 76P, GCP4
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 6N [auth L]1,819Homo sapiensMutation(s): 0 
Gene Names: TUBGCP6, GCP6, KIAA1669
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.0
MODEL REFINEMENTPHENIX

Structure Validation

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View more in-depth experimental data
Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyPF 963/1-4
German Research Foundation (DFG)GermanySchi 295/4-4

Revision History  (Full details and data files)

  • Version 1.0: 2022-01-26
    Type: Initial release
  • Version 1.1: 2022-02-09
    Changes: Database references