6VPP

Cryo-EM structure of microtubule-bound KLP61F motor with tail domain in the nucleotide-free state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.40 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report



Literature

The kinesin-5 tail domain directly modulates the mechanochemical cycle of the motor domain for anti-parallel microtubule sliding.

Bodrug, T.Wilson-Kubalek, E.M.Nithianantham, S.Thompson, A.F.Alfieri, A.Gaska, I.Major, J.Debs, G.Inagaki, S.Gutierrez, P.Gheber, L.McKenney, R.J.Sindelar, C.V.Milligan, R.Stumpff, J.Rosenfeld, S.S.Forth, S.T.Al-Bassam, J.

(2020) Elife 9

  • DOI: 10.7554/eLife.51131
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Kinesin-5 motors organize mitotic spindles by sliding apart microtubules. They are homotetramers with dimeric motor and tail domains at both ends of a bipolar minifilament. Here, we describe a regulatory mechanism involving direct binding between tail and motor domains and its fundamental role in microtubule sliding ...

    Kinesin-5 motors organize mitotic spindles by sliding apart microtubules. They are homotetramers with dimeric motor and tail domains at both ends of a bipolar minifilament. Here, we describe a regulatory mechanism involving direct binding between tail and motor domains and its fundamental role in microtubule sliding. Kinesin-5 tails decrease microtubule-stimulated ATP-hydrolysis by specifically engaging motor domains in the nucleotide-free or ADP states. Cryo-EM reveals that tail binding stabilizes an open motor domain ATP-active site. Full-length motors undergo slow motility and cluster together along microtubules, while tail-deleted motors exhibit rapid motility without clustering. The tail is critical for motors to zipper together two microtubules by generating substantial sliding forces. The tail is essential for mitotic spindle localization, which becomes severely reduced in tail-deleted motors. Our studies suggest a revised microtubule-sliding model, in which kinesin-5 tails stabilize motor domains in the microtubule-bound state by slowing ATP-binding, resulting in high-force production at both homotetramer ends.


    Organizational Affiliation

    Department of Molecular and Cellular Biology, University of California, Davis, Davis, United States.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tubulin alpha-1A chainA451Sus 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tubulin beta chainB445Sus scrofaMutation(s): 0 
Find proteins for P02554 (Sus scrofa)
Explore P02554 
Go to UniProtKB:  P02554
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Kinesin-like protein Klp61FC377Drosophila melanogasterMutation(s): 0 
Gene Names: Klp61FKLP2CG9191
Find proteins for P46863 (Drosophila melanogaster)
Explore P46863 
Go to UniProtKB:  P46863
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

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

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

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

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.40 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 StatesGM110283
National Science Foundation (NSF, United States)United States1615991

Revision History 

  • Version 1.0: 2020-02-19
    Type: Initial release