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Kinesin-4 KIF21B is a potent microtubule pausing factor.
Journal article

Kinesin-4 KIF21B is a potent microtubule pausing factor.

  • van Riel WE Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
  • Rai A Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
  • Bianchi S Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institut, Villigen PSI, Switzerland.
  • Katrukha EA Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
  • Liu Q Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
  • Heck AJ Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research, Utrecht Institute for Pharmaceutical Sciences and The Netherlands Proteomics Centre, Utrecht University, Utrecht, Netherlands.
  • Hoogenraad CC Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
  • Steinmetz MO Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institut, Villigen PSI, Switzerland.
  • Kapitein LC Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
  • Akhmanova A Cell Biology, Department of Biology, Faculty of Science, Utrecht University, Utrecht, Netherlands.
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  • 2017-03-15
Published in:
  • eLife. - 2017
EB1
KIF21B
Kinesin
Kinesin-4
biophysics
cell biology
human
microtubule dynamics
pausing
structural biology
Animals
COS Cells
Chlorocebus aethiops
HEK293 Cells
Humans
Kinesin
Microtubules
Protein Binding
Protein Domains
Protein Interaction Mapping
Protein Multimerization
English Microtubules are dynamic polymers that in cells can grow, shrink or pause, but the factors that promote pausing are poorly understood. Here, we show that the mammalian kinesin-4 KIF21B is a processive motor that can accumulate at microtubule plus ends and induce pausing. A few KIF21B molecules are sufficient to induce strong growth inhibition of a microtubule plus end in vitro. This property depends on non-motor microtubule-binding domains located in the stalk region and the C-terminal WD40 domain. The WD40-containing KIF21B tail displays preference for a GTP-type over a GDP-type microtubule lattice and contributes to the interaction of KIF21B with microtubule plus ends. KIF21B also contains a motor-inhibiting domain that does not fully block the interaction of the protein with microtubules, but rather enhances its pause-inducing activity by preventing KIF21B detachment from microtubule tips. Thus, KIF21B combines microtubule-binding and regulatory activities that together constitute an autonomous microtubule pausing factor.
Language
  • English
Open access status
gold
Identifiers
Persistent URL
https://sonar.ch/global/documents/886
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