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Pseudo-atomic model of microtubule-bound S.pombe kinesin-5 motor domain in the AMPPNP state (based on cryo-electron microscopy experiment): the N-terminus adopts multiple conformations.
ELECTRON MICROSCOPY
Sample
microtubule-bound S. pombe kinesin-5 motor domain in the AMPPNP state
Specimen Preparation
Sample Aggregation State
HELICAL ARRAY
Vitrification Instrument
FEI VITROBOT MARK I
Cryogen Name
ETHANE
Sample Vitrification Details
3D Reconstruction
Reconstruction Method
SINGLE PARTICLE
Number of Particles
144300
Reported Resolution (Å)
9.3
Resolution Method
FSC 0.5 CUT-OFF
Other Details
Refinement Type
Symmetry Type
POINT
Map-Model Fitting and Refinement
Id
1
Refinement Space
REAL
Refinement Protocol
FLEXIBLE FIT
Refinement Target
Cross-correlation coefficient
Overall B Value
Fitting Procedure
Details
An initial homology model of S. pombe cut7 kinesin-5 motor domain based on human kinesin-5 structure (PDB 3HQD) was prepared using Modeller. The coord ...
An initial homology model of S. pombe cut7 kinesin-5 motor domain based on human kinesin-5 structure (PDB 3HQD) was prepared using Modeller. The coordinates of motor bound to an alpha-beta tubulin dimer (PDB 1JFF) were rigidly fitted into the cryo-EM map using Chimera and refined by flexible fitting using Flex-EM. Structural models of loop5 and loop10 were generated using Modeller. The conformation of the neck-linker and the N-terminus were calculated using a conjugate-gradient energy minimization approach.
Data Acquisition
Detector Type
GATAN ULTRASCAN 4000 (4k x 4k)
Electron Dose (electrons/Å**2)
20
Imaging Experiment
1
Date of Experiment
Temperature (Kelvin)
Microscope Model
FEI TECNAI F20
Minimum Defocus (nm)
700
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
GATAN CT3500 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER