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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
2
Imaging Mode
BRIGHT FIELD
Specimen Holder Model
GATAN CT3500 SINGLE TILT LIQUID NITROGEN CRYO TRANSFER HOLDER