4UXO

Conserved mechanisms of microtubule-stimulated ADP release, ATP binding, and force generation in transport kinesins

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.3 of the entry. See complete history. 


Literature

Conserved Mechanisms of Microtubule-Stimulated Adp Release, ATP Binding, and Force Generation in Transport Kinesins.

Atherton, J., Farabella, I., Yu, I., Rosenfeld, S.S., Houdusse, A., Topf, M., Moores, C.A.

(2014) Elife 3: 3680

  • DOI: 10.7554/eLife.03680
  • Primary Citation of Related Structures:  
    4UXO, 4UY0, 4UXP, 4UXR, 4UXS, 4UXT, 4UXY

  • PubMed Abstract: 

    • Kinesins are a superfamily of microtubule-based ATP-powered motors, important for multiple, essential cellular functions. How microtubule binding stimulates their ATPase and controls force generation is not understood. To address this fundamental questio ...

    Kinesins are a superfamily of microtubule-based ATP-powered motors, important for multiple, essential cellular functions. How microtubule binding stimulates their ATPase and controls force generation is not understood. To address this fundamental question, we visualized microtubule-bound kinesin-1 and kinesin-3 motor domains at multiple steps in their ATPase cycles--including their nucleotide-free states--at ∼ 7 Å resolution using cryo-electron microscopy. In both motors, microtubule binding promotes ordered conformations of conserved loops that stimulate ADP release, enhance microtubule affinity and prime the catalytic site for ATP binding. ATP binding causes only small shifts of these nucleotide-coordinating loops but induces large conformational changes elsewhere that allow force generation and neck linker docking towards the microtubule plus end. Family-specific differences across the kinesin-microtubule interface account for the distinctive properties of each motor. Our data thus provide evidence for a conserved ATP-driven mechanism for kinesins and reveal the critical mechanistic contribution of the microtubule interface.

    Organizational Affiliation: 

    Institute of Structural and Molecular Biology, Department of Biological Sciences, Birkbeck College, University of London, London, United Kingdom.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TUBULIN ALPHA-1B CHAIN A451Bos taurusMutation(s): 0 
Find proteins for P81947 (Bos taurus)
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Go to UniProtKB:  P81947
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
TUBULIN BETA-2B CHAIN B445Bos taurusMutation(s): 0 
Gene Names: TUBB2B
Find proteins for Q6B856 (Bos taurus)
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Go to UniProtKB:  Q6B856
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
KINESIN-3 MOTOR DOMAIN C375Homo sapiensMutation(s): 0 
Gene Names: KIF1A, ATSV, C2orf20
Find proteins for Q12756 (Homo sapiens)
Explore Q12756 
Go to UniProtKB:  Q12756
NIH Common Fund Data Resources
PHAROS:  Q12756
GTEx:  ENSG00000130294
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TA1
Query on TA1
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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
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B
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N		 Ligand Interaction
ZN
Query on ZN
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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-09-24
    Type: Initial release
  • Version 1.1: 2014-10-22
    Changes: Database references
  • Version 1.2: 2017-08-23
    Changes: Data collection, Refinement description, Source and taxonomy, Structure summary
  • Version 1.3: 2018-04-04
    Changes: Data collection, Structure summary