5UCY

Cryo-EM map of protofilament of microtubule doublet


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.6 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

Subnanometre-resolution structure of the doublet microtubule reveals new classes of microtubule-associated proteins.

Ichikawa, M.Liu, D.Kastritis, P.L.Basu, K.Hsu, T.C.Yang, S.Bui, K.H.

(2017) Nat Commun 8: 15035-15035

  • DOI: 10.1038/ncomms15035
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cilia are ubiquitous, hair-like appendages found in eukaryotic cells that carry out functions of cell motility and sensory reception. Cilia contain an intriguing cytoskeletal structure, termed the axoneme that consists of nine doublet microtubules ra ...

    Cilia are ubiquitous, hair-like appendages found in eukaryotic cells that carry out functions of cell motility and sensory reception. Cilia contain an intriguing cytoskeletal structure, termed the axoneme that consists of nine doublet microtubules radially interlinked and longitudinally organized in multiple specific repeat units. Little is known, however, about how the axoneme allows cilia to be both actively bendable and sturdy or how it is assembled. To answer these questions, we used cryo-electron microscopy to structurally analyse several of the repeating units of the doublet at sub-nanometre resolution. This structural detail enables us to unambiguously assign α- and β-tubulins in the doublet microtubule lattice. Our study demonstrates the existence of an inner sheath composed of different kinds of microtubule inner proteins inside the doublet that likely stabilizes the structure and facilitates the specific building of the B-tubule.


    Organizational Affiliation

    Department of Anatomy and Cell Biology, McGill University, Montréal, Québec, Canada H3A 0C7.,Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg 69117, Germany.,Groupe de Recherche Axé sur la Structure des Protéines (GRASP), Montréal, Québec, Canada H3G 0B1.,Facility for Electron Microscopy Research, McGill University, Montréal, Québec, Canada H3A 0C7.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tubulin alpha chain
A
441Tetrahymena thermophilaMutation(s): 0 
Find proteins for P41351 (Tetrahymena thermophila)
Go to UniProtKB:  P41351
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tubulin beta chain
B
429Tetrahymena thermophilaMutation(s): 0 
Gene Names: BTU1, BTU2
Find proteins for P41352 (Tetrahymena thermophila)
Go to UniProtKB:  P41352
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GDP
Query on GDP

Download SDF File 
Download CCD File 
B
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
 Ligand Interaction
GTP
Query on GTP

Download SDF File 
Download CCD File 
A
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.6 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)Canada69462

Revision History 

  • Version 1.0: 2017-05-10
    Type: Initial release
  • Version 1.1: 2017-05-17
    Type: Database references
  • Version 1.2: 2017-09-27
    Type: Author supporting evidence, Data collection
  • Version 1.3: 2018-05-16
    Type: Data collection, Derived calculations
  • Version 1.4: 2018-07-18
    Type: Data collection
  • Version 1.5: 2020-01-15
    Type: Author supporting evidence