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 1.2 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: https://doi.org/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. 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.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Gamma-tubulin complex component 2
A, C, E, G, M
930Homo sapiensMutation(s): 0 
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PHAROS:  Q9BSJ2
GTEx:  ENSG00000130640 
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UniProt GroupQ9BSJ2
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Gamma-tubulin complex component 3B,
D,
F,
H,
S [auth T]
907Homo sapiensMutation(s): 0 
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Find proteins for Q96CW5 (Homo sapiens)
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PHAROS:  Q96CW5
GTEx:  ENSG00000126216 
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UniProt GroupQ96CW5
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Gamma-tubulin complex component 4
I, K
667Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000137822 
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UniProt GroupQ9UGJ1
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Gamma-tubulin complex component 51,024Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000275835 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Gamma-tubulin complex component 61,819Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000128159 
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Entity ID: 6
MoleculeChains Sequence 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
MoleculeChains Sequence LengthOrganismDetailsImage
beta actinT [auth U]374Homo sapiensMutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Unassigned poly-alanine model ("CC")U [auth V],
X [auth Y]
66Homo sapiensMutation(s): 0 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Unassigned poly-alanine model ("HB")V [auth W]165Homo sapiensMutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Unassigned poly-alanine model ("Lumenal bridge helical bundles")W [auth X]263Homo sapiensMutation(s): 0 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin gamma-1 chain451Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000131462 
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Small Molecules
Ligands 2 Unique
IDChains Name / 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
ADP
Query on ADP

Download Ideal Coordinates CCD File 
MA [auth U]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
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
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references