6V6S

Structure of the native human gamma-tubulin ring complex

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.30 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

Asymmetric Molecular Architecture of the Human gamma-Tubulin Ring Complex.

Wieczorek, M., Urnavicius, L., Ti, S.C., Molloy, K.R., Chait, B.T., Kapoor, T.M.

(2020) Cell 180: 165-175.e16

  • DOI: 10.1016/j.cell.2019.12.007
  • Primary Citation of Related Structures:  
    6V5V, 6V69, 6V6B, 6V6C, 6V6S

  • PubMed 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 native human γ-TuRC at ∼3.8 Å resolution, revealing an asymmetric, cone-shaped structure ...

    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 2 ) 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.

    Organizational Affiliation: 

    Laboratory of Chemistry and Cell Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA. Electronic address: kapoor@rockefeller.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 2A, C, E, G, M930Homo sapiensMutation(s): 0 
Gene Names: TUBGCP2, GCP2
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UniProt GroupQ9BSJ2
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 3B,
D,
F,
H,
S [auth T]		907Homo sapiensMutation(s): 0 
Gene Names: TUBGCP3, GCP3
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Find proteins for Q96CW5 (Homo sapiens)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 4I, K667Homo sapiensMutation(s): 0 
Gene Names: TUBGCP4, 76P, GCP4
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 5J1,024Homo sapiensMutation(s): 0 
Gene Names: TUBGCP5, GCP5, KIAA1899
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 6L1,819Homo sapiensMutation(s): 0 
Gene Names: TUBGCP6, GCP6, KIAA1669
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Unassigned poly-alanine chain ("staple")N,
O,
P [auth Q],
Q [auth R],
R [auth S]		50Homo sapiensMutation(s): 0 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
beta actinT [auth U]374Homo sapiensMutation(s): 0 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Unassigned poly-alanine model ("CC")U [auth V],
X [auth Y]		66Homo sapiensMutation(s): 0 
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Unassigned poly-alanine model ("HB")V [auth W]165Homo sapiensMutation(s): 0 
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Unassigned poly-alanine model ("Lumenal bridge helical bundles")W [auth X]263Homo sapiensMutation(s): 0 
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin gamma-1 chain451Homo sapiensMutation(s): 0 
Gene Names: TUBG1, TUBG
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Find proteins for P23258 (Homo sapiens)
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Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP
Download Ideal Coordinates CCD File 
AB [auth t],
NA [auth a],
OA [auth b],
PA [auth c],
QA [auth d],
AB [auth t],
NA [auth a],
OA [auth b],
PA [auth c],
QA [auth d],
RA [auth e],
SA [auth f],
TA [auth g],
UA [auth h],
VA [auth i],
WA [auth j],
XA [auth k],
YA [auth l],
ZA [auth m]
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N		 Ligand Interaction
ADP
Query on ADP
Download Ideal Coordinates CCD File 
MA [auth U]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35 GM130234
Human Frontier Science Program (HFSP)FranceLT000025/18-L1

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-01
    Type: Initial release
  • Version 1.1: 2020-01-22
    Changes: Database references