3J6P

Pseudo-atomic model of dynein microtubule binding domain-tubulin complex based on a cryoEM map

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.20 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

A flipped ion pair at the dynein-microtubule interface is critical for dynein motility and ATPase activation

Uchimura, S., Fujii, T., Takazaki, H., Ayukawa, R., Nishikawa, Y., Minoura, I., Hachikubo, Y., Kurisu, G., Sutoh, K., Kon, T., Namba, K., Muto, E.

(2015) J Cell Biol 208: 211-222

  • DOI: 10.1083/jcb.201407039
  • Primary Citation of Related Structures:  
    3J6P

  • PubMed Abstract: 

    • Dynein is a motor protein that moves on microtubules (MTs) using the energy of adenosine triphosphate (ATP) hydrolysis. To understand its motility mechanism, it is crucial to know how the signal of MT binding is transmitted to the ATPase domain to enhanc ...

    Dynein is a motor protein that moves on microtubules (MTs) using the energy of adenosine triphosphate (ATP) hydrolysis. To understand its motility mechanism, it is crucial to know how the signal of MT binding is transmitted to the ATPase domain to enhance ATP hydrolysis. However, the molecular basis of signal transmission at the dynein-MT interface remains unclear. Scanning mutagenesis of tubulin identified two residues in α-tubulin, R403 and E416, that are critical for ATPase activation and directional movement of dynein. Electron cryomicroscopy and biochemical analyses revealed that these residues form salt bridges with the residues in the dynein MT-binding domain (MTBD) that work in concert to induce registry change in the stalk coiled coil and activate the ATPase. The R403-E3390 salt bridge functions as a switch for this mechanism because of its reversed charge relative to other residues at the interface. This study unveils the structural basis for coupling between MT binding and ATPase activation and implicates the MTBD in the control of directional movement.

    Organizational Affiliation: 

    Laboratory for Molecular Biophysics, RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan emuto2@brain.riken.jp.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Dynein heavy chain, cytoplasmic D108Dictyostelium discoideumMutation(s): 0 
Gene Names: DDB_G0276355, dhcA
Find proteins for P34036 (Dictyostelium discoideum)
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Go to UniProtKB:  P34036
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin alpha-1A chain A451Sus scrofaMutation(s): 0 
Gene Names: TUBA1A
Find proteins for P02550 (Sus scrofa)
Explore P02550 
Go to UniProtKB:  P02550
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin beta chain B445Sus scrofaMutation(s): 0 
Find proteins for P02554 (Sus scrofa)
Explore P02554 
Go to UniProtKB:  P02554
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TA1
Query on TA1
Download Ideal Coordinates CCD File 
B
TAXOL
C47 H51 N O14
RCINICONZNJXQF-MZXODVADSA-N		 Ligand Interaction
GTP
Query on GTP
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A
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N		 Ligand Interaction
GDP
Query on GDP
Download Ideal Coordinates CCD File 
B
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.20 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-12-31
    Type: Initial release
  • Version 1.1: 2015-04-08
    Changes: Database references