8Q62

Early closed conformation of the g-tubulin ring complex

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	7AS4
experimental model	PDB	6X0U

Refinement

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.055
r_dihedral_angle_3_deg	18.293
r_dihedral_angle_4_deg	15.755
r_long_range_B_refined	13.405
r_long_range_B_other	13.405
r_mcangle_it	6.295
r_mcangle_other	6.295
r_scangle_other	5.278
r_dihedral_angle_1_deg	5.155
r_mcbond_it	3.659
r_mcbond_other	3.659
r_scbond_it	2.855
r_scbond_other	2.855
r_angle_refined_deg	1.469
r_angle_other_deg	1.454
r_chiral_restr	0.076
r_gen_planes_refined	0.009
r_bond_refined_d	0.008
r_bond_other_d	0.008
r_gen_planes_other	0.003
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Sample
gamma-tubulin ring complex

Specimen Preparation
Sample Aggregation State	PARTICLE
Vitrification Instrument	FEI VITROBOT MARK IV
Cryogen Name	ETHANE
Sample Vitrification Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	357509
Reported Resolution (Å)	3.72
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (7AS4, 6X0U)
Refinement Space	REAL
Refinement Protocol	FLEXIBLE FIT
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K3 (6k x 4k)
Electron Dose (electrons/Å**2)	46.276

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	1000
Maximum Defocus (nm)	2000
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.7
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	FEI TITAN KRIOS AUTOGRID HOLDER
Nominal Magnification	130000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
MODEL REFINEMENT	REFMAC	5.8.0267

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		1580023