8VT7

Structure of the gamma tubulin ring complex nucleated microtubule protofilament.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.66 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

Structure of the gamma-tubulin ring complex-capped microtubule.

Aher, A.Urnavicius, L.Xue, A.Neselu, K.Kapoor, T.M.

(2024) Nat Struct Mol Biol 31: 1124-1133

  • DOI: https://doi.org/10.1038/s41594-024-01264-z
  • Primary Citation of Related Structures:  
    8VA2, 8VRD, 8VRJ, 8VRK, 8VT7

  • PubMed Abstract: 

    Microtubules are composed of α-tubulin and β-tubulin dimers positioned head-to-tail to form protofilaments that associate laterally in varying numbers. It is not known how cellular microtubules assemble with the canonical 13-protofilament architecture, resulting in micrometer-scale α/β-tubulin tracks for intracellular transport that align with, rather than spiral along, the long axis of the filament. We report that the human ~2.3 MDa γ-tubulin ring complex (γ-TuRC), an essential regulator of microtubule formation that contains 14 γ-tubulins, selectively nucleates 13-protofilament microtubules. Cryogenic electron microscopy reconstructions of γ-TuRC-capped microtubule minus ends reveal the extensive intra-domain and inter-domain motions of γ-TuRC subunits that accommodate luminal bridge components and establish lateral and longitudinal interactions between γ-tubulins and α-tubulins. Our structures suggest that γ-TuRC, an inefficient nucleation template owing to its splayed conformation, can transform into a compacted cap at the microtubule minus end and set the lattice architecture of cellular microtubules.


  • Organizational Affiliation

    Laboratory of Chemistry and Cell Biology, The Rockefeller University, New York, NY, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin beta-3 chainA [auth F],
C [auth A]
456Homo sapiensMutation(s): 0 
Gene Names: TUBB3TUBB4
UniProt & NIH Common Fund Data Resources
Find proteins for Q13509 (Homo sapiens)
Explore Q13509 
Go to UniProtKB:  Q13509
PHAROS:  Q13509
GTEx:  ENSG00000258947 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13509
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin alpha-1B chainB [auth J],
D [auth B]
457Homo sapiensMutation(s): 0 
Gene Names: TUBA1B
EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for P68363 (Homo sapiens)
Explore P68363 
Go to UniProtKB:  P68363
PHAROS:  P68363
GTEx:  ENSG00000123416 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68363
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GTP (Subject of Investigation/LOI)
Query on GTP

Download Ideal Coordinates CCD File 
F [auth J],
I [auth B]
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
GDP (Subject of Investigation/LOI)
Query on GDP

Download Ideal Coordinates CCD File 
E [auth F],
H [auth A]
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
MG (Subject of Investigation/LOI)
Query on MG

Download Ideal Coordinates CCD File 
G [auth J],
J [auth B]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.66 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesGM130234

Revision History  (Full details and data files)

  • Version 1.0: 2024-03-27
    Type: Initial release
  • Version 1.1: 2024-04-24
    Changes: Database references
  • Version 1.2: 2024-07-31
    Changes: Data collection, Database references