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High-resolution structures of kinesin on microtubules provide a basis for nucleotide-gated force-generation

Journal Article · · eLife
DOI:https://doi.org/10.7554/elife.04686· OSTI ID:1628826
 [1];  [2];  [3];  [4];  [5];  [2]
  1. Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, United States; DOE/OSTI
  2. Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, United States
  3. Department of Biology, Brandeis University, Waltham, United States
  4. Life Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, United States
  5. Department of Molecular and Cellular Biochemistry, Indiana University, Bloomington, United States

Microtubule-based transport by the kinesin motors, powered by ATP hydrolysis, is essential for a wide range of vital processes in eukaryotes. We obtained insight into this process by developing atomic models for no-nucleotide and ATP states of the monomeric kinesin motor domain on microtubules from cryo-EM reconstructions at 5–6 Å resolution. By comparing these models with existing X-ray structures of ADP-bound kinesin, we infer a mechanistic scheme in which microtubule attachment, mediated by a universally conserved ‘linchpin’ residue in kinesin (N255), triggers a clamshell opening of the nucleotide cleft and accompanying release of ADP. Binding of ATP re-closes the cleft in a manner that tightly couples to translocation of cargo, via kinesin's ‘neck linker’ element. These structural transitions are reminiscent of the analogous nucleotide-exchange steps in the myosin and F1-ATPase motors and inform how the two heads of a kinesin dimer ‘gate’ each other to promote coordinated stepping along microtubules.

Research Organization:
Lawrence Berkeley National Lab (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); American Cancer Society; National Institutes of Health
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1628826
Journal Information:
eLife, Journal Name: eLife Vol. 3; ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (22)

Reversal of axonal growth defects in an extraocular fibrosis model by engineering the kinesin–microtubule interface journal January 2016
Crystal structure of Zen4 in the apo state reveals a missing conformation of kinesin journal April 2017
Microtubule structure by cryo-EM: snapshots of dynamic instability journal October 2018
Structural basis of human kinesin-8 function and inhibition journal October 2017
The yeast kinesin-5 Cin8 interacts with the microtubule in a noncanonical manner journal September 2017
An allosteric propofol-binding site in kinesin disrupts kinesin-mediated processive movement on microtubules journal May 2018
The family-specific α4-helix of the kinesin-13, MCAK, is critical to microtubule end recognition journal October 2016
Emerging Insights into the Function of Kinesin-8 Proteins in Microtubule Length Regulation posted_content December 2018
The divergent mitotic kinesin MKLP2 exhibits atypical structure and mechanochemistry journal August 2017
Kinesin motility is driven by subdomain dynamics journal November 2017
Structural insight into TPX2-stimulated microtubule assembly journal November 2017
Neck linker docking is critical for Kinesin-1 force generation in cells but at a cost to motor speed and processivity journal May 2019
Identification of key residues that regulate the interaction of kinesins with microtubule ends journal July 2019
Investigating role of conformational changes of microtubule in regulating its binding affinity to kinesin by all-atom molecular dynamics simulation journal October 2018
A microtubule RELION-based pipeline for cryo-EM image processing journal January 2020
Structural determinants of microtubule minus end preference in CAMSAP CKK domains journal November 2019
Direct induction of microtubule branching by microtubule nucleation factor SSNA1 journal September 2018
Near-atomic cryo-EM structure of PRC1 bound to the microtubule journal August 2016
Kinesin-2 motors: Kinetics and biophysics journal February 2018
Recent progress in structural biology: lessons from our research history journal May 2018
Mutations in TUBB8 cause a multiplicity of phenotypes in human oocytes and early embryos journal June 2016
Emerging Insights into the Function of Kinesin-8 Proteins in Microtubule Length Regulation journal December 2018

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