4ABO

Mal3 CH domain homology model and mammalian tubulin (2XRP) docked into the 8.6-Angstrom cryo-EM map of Mal3-GTPgammaS-microtubules


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.60 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Ebs Recognize a Nucleotide-Dependent Structural CAP at Growing Microtubule Ends.

Maurer, S.P.Fourniol, F.J.Bohner, G.Moores, C.A.Surrey, T.

(2012) Cell 149: 371

  • DOI: 10.1016/j.cell.2012.02.049
  • Primary Citation of Related Structures:  
    4ABO

  • PubMed Abstract: 
  • Growing microtubule ends serve as transient binding platforms for essential proteins that regulate microtubule dynamics and their interactions with cellular substructures. End-binding proteins (EBs) autonomously recognize an extended region at growing microtubule ends with unknown structural characteristics and then recruit other factors to the dynamic end structure ...

    Growing microtubule ends serve as transient binding platforms for essential proteins that regulate microtubule dynamics and their interactions with cellular substructures. End-binding proteins (EBs) autonomously recognize an extended region at growing microtubule ends with unknown structural characteristics and then recruit other factors to the dynamic end structure. Using cryo-electron microscopy, subnanometer single-particle reconstruction, and fluorescence imaging, we present a pseudoatomic model of how the calponin homology (CH) domain of the fission yeast EB Mal3 binds to the end regionsĀ of growing microtubules. The Mal3 CH domain bridges protofilaments except at the microtubule seam. By binding close to the exchangeable GTP-binding site, the CH domain is ideally positioned to sense the microtubule's nucleotide state. The same microtubule-end region is also a stabilizing structural cap protecting the microtubule from depolymerization. This insight supports a common structural link between two important biological phenomena, microtubule dynamic instability and end tracking.


    Organizational Affiliation

    Cancer Research UK London Research Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London WC2A 3LY, UK.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TUBULIN BETA CHAINA, C, E, G445Sus scrofaMutation(s): 0 
EC: 3.6.5.6
Find proteins for P02554 (Sus scrofa)
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Go to UniProtKB:  P02554
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TUBULIN ALPHA-1A CHAINB, D, F, H451Sus scrofaMutation(s): 0 
Gene Names: TUBA1A
EC: 3.6.5.6
Find proteins for P02550 (Sus scrofa)
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Go to UniProtKB:  P02550
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
MICROTUBULE INTEGRITY PROTEIN MAL3I145Schizosaccharomyces pombeMutation(s): 0 
Find proteins for Q10113 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
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Go to UniProtKB:  Q10113
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Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.60 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-06-06
    Type: Initial release
  • Version 1.1: 2017-04-19
    Changes: Other
  • Version 1.2: 2017-08-30
    Changes: Data collection, Refinement description