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: TUBGCP2GCP2
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Find proteins for Q9BSJ2 (Homo sapiens)
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PHAROS:  Q9BSJ2
GTEx:  ENSG00000130640 
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Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
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: TUBGCP3GCP3
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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
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 4I, K667Homo sapiensMutation(s): 0 
Gene Names: TUBGCP476PGCP4
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PHAROS:  Q9UGJ1
GTEx:  ENSG00000137822 
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UniProt GroupQ9UGJ1
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 5J1024Homo sapiensMutation(s): 0 
Gene Names: TUBGCP5GCP5KIAA1899
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GTEx:  ENSG00000275835 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 6L1819Homo sapiensMutation(s): 0 
Gene Names: TUBGCP6GCP6KIAA1669
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GTEx:  ENSG00000128159 
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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: TUBG1TUBG
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Find proteins for P23258 (Homo sapiens)
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GTEx:  ENSG00000131462 
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UniProt GroupP23258
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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