5IJ0

Cryo EM density of microtubule assembled from human TUBB3


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Mutations in Human Tubulin Proximal to the Kinesin-Binding Site Alter Dynamic Instability at Microtubule Plus- and Minus-Ends.

Ti, S.C.Pamula, M.C.Howes, S.C.Duellberg, C.Cade, N.I.Kleiner, R.E.Forth, S.Surrey, T.Nogales, E.Kapoor, T.M.

(2016) Dev Cell 37: 72-84

  • DOI: https://doi.org/10.1016/j.devcel.2016.03.003
  • Primary Citation of Related Structures:  
    5IJ0, 5IJ9

  • PubMed Abstract: 

    The assembly of microtubule-based cellular structures depends on regulated tubulin polymerization and directional transport. Here, we purify and characterize tubulin heterodimers that have human β-tubulin isotype III (TUBB3), as well as heterodimers with one of two β-tubulin mutations (D417H or R262H). Both point mutations are proximal to the kinesin-binding site and have been linked to an ocular motility disorder in humans. Compared to wild-type, microtubules with these mutations have decreased catastrophe frequencies and increased average lifetimes of plus- and minus-end-stabilizing caps. Importantly, the D417H mutation does not alter microtubule lattice structure or Mal3 binding to growing filaments. Instead, this mutation reduces the affinity of tubulin for TOG domains and colchicine, suggesting that the distribution of tubulin heterodimer conformations is changed. Together, our findings reveal how residues on the surface of microtubules, distal from the GTP-hydrolysis site and inter-subunit contacts, can alter polymerization dynamics at the plus- and minus-ends of microtubules.


  • Organizational Affiliation

    The Francis Crick Institute, Lincoln's Inn Fields Laboratory, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin alpha-1B chain437Homo sapiensMutation(s): 0 
Gene Names: TUBA1B
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
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin beta-3 chain426Homo 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
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM65933
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM051487

Revision History  (Full details and data files)

  • Version 1.0: 2016-04-20
    Type: Initial release
  • Version 1.1: 2017-09-27
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2019-12-25
    Changes: Author supporting evidence