6R0C

Human-D02 Nucleosome Core Particle with biotin-streptavidin label

ELECTRON MICROSCOPY

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Sample
Human-D02 Nucleosome Core Particle with biotin-streptavidin label
Sample Components
Histones
DNA

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	62196
Reported Resolution (Å)	4.2
Resolution Method	FSC 0.143 CUT-OFF
Other Details
Refinement Type
Symmetry Type	POINT
Point Symmetry	C1

Map-Model Fitting and Refinement
Id	1 (3UTB)
Refinement Space	REAL
Refinement Protocol
Refinement Target
Overall B Value
Fitting Procedure
Details	The initial model was placed in the density using Chimera. Manual building was performed in Coot and final refinement was carried out using phenix.real_space_refine. Additional restraints describing protein secondary structure, DNA base pairing and stacking were used in Phenix.

Data Acquisition
Detector Type	FEI FALCON III (4k x 4k)
Electron Dose (electrons/Å**2)	28.3

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TITAN KRIOS
Minimum Defocus (nm)	1.5
Maximum Defocus (nm)	3.5
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	75000
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	300
Imaging Details

EM Software
Task	Software Package	Version
PARTICLE SELECTION	RELION	2.1
IMAGE ACQUISITION	EPU
CTF CORRECTION	Gctf	1.08
MODEL FITTING	Coot
INITIAL EULER ASSIGNMENT	RELION	2.1
FINAL EULER ASSIGNMENT	RELION	2.1
CLASSIFICATION	RELION	2.1
RECONSTRUCTION	RELION	2.1
MODEL REFINEMENT	PHENIX

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
PHASE FLIPPING AND AMPLITUDE CORRECTION		3712	obvious micrographs with cubic ice were discarded