3JAR | pdb_00003jar

Cryo-EM structure of GDP-microtubule co-polymerized with EB3

ELECTRON MICROSCOPY

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Refinement

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.255
r_dihedral_angle_3_deg	14.638
r_dihedral_angle_4_deg	11.999
r_dihedral_angle_1_deg	11.79
r_mcangle_it	3.632
r_mcbond_it	1.969
r_mcbond_other	1.969
r_angle_refined_deg	1.318
r_angle_other_deg	0.932
r_chiral_restr	0.079
r_bond_refined_d	0.008
r_gen_planes_refined	0.006
r_bond_other_d	0.002
r_gen_planes_other	0.001

Sample
GDP-microtubule co-polymerized with EB3
Sample Components
Alpha tubulin
Beta tubulin
EB3

Specimen Preparation
Sample Aggregation State	FILAMENT
Vitrification Instrument	FEI VITROBOT MARK II
Cryogen Name	ETHANE
Sample Vitrification Details	Blot once for 4 seconds before plunging into liquid ethane (FEI VITROBOT MARK II).

3D Reconstruction
Reconstruction Method	HELICAL
Number of Particles
Reported Resolution (Å)	3.4
Resolution Method	FSC 0.143 CUT-OFF
Other Details	IHRSR algorithm with microtubule-specific pseudo-helical symmetry applied
Refinement Type
Symmetry Type	HELICAL
Axial Symmetry	C1
Axial Rise	9.42
Angular Rotation	27.71

Map-Model Fitting and Refinement
Id	1
Refinement Space
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details

Data Acquisition
Detector Type	GATAN K2 (4k x 4k)
Electron Dose (electrons/Å**2)	27.6

Imaging Experiment	1
Date of Experiment	2014-04-09
Temperature (Kelvin)	90
Microscope Model	FEI TITAN
Minimum Defocus (nm)	1000
Maximum Defocus (nm)	3500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	2.7
Imaging Mode	BRIGHT FIELD
Specimen Holder Model	GATAN LIQUID NITROGEN
Nominal Magnification	27500
Calibrated Magnification	27500
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
RECONSTRUCTION	EMAN	1
RECONSTRUCTION	FREALIGN

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	CTFFIND4, each particle