2XQL | pdb_00002xql

Fitting of the H2A-H2B histones in the electron microscopy map of the complex Nucleoplasmin:H2A-H2B histones (1:5).

ELECTRON MICROSCOPY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1AOI

Sample
NUCLEOPLASMIN H2A-H2B HISTONES COMPLEX.

Specimen Preparation
Sample Aggregation State	PARTICLE
Staining Type	NEGATIVE
Staining Material	Uranyl Acetate
Staining Details

3D Reconstruction
Reconstruction Method	SINGLE PARTICLE
Number of Particles	5557
Reported Resolution (Å)	19.5
Resolution Method
Other Details	DOCKING OF FIVE DIMERS OF H2A-H2B HISTONES IN THE NUCLEOPLASMIN H2A-H2B COMPLEX (1 5-5). THE EXTENDED REGION OF THE H2A HISTONE WAS REMOVED. THE FINAL DOCKING INCLUDES THE FRAGMENTS FROM AMINOACID 15 TO 105 OF H2A HISTONE AND 36 TO 125 OF H2B HISTONE. SUBMISSION BASED ON EXPERIMENTAL DATA FROM EMDB EMD-1777. (DEPOSITION ID: 7474).
Refinement Type
Symmetry Type	POINT
Point Symmetry	C5

Map-Model Fitting and Refinement
Id	1 (1AOI)
Refinement Space	REAL
Refinement Protocol	OTHER
Refinement Target
Overall B Value
Fitting Procedure
Details	METHOD--VOLUMETRIC CORRELATION REFINEMENT PROTOCOL--PROJECTION MATCHING

Data Acquisition
Detector Type	KODAK SO-163 FILM
Electron Dose (electrons/Å**2)

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)	293
Microscope Model	JEOL 1200EXII
Minimum Defocus (nm)	1000
Maximum Defocus (nm)	2500
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS	5.6
Imaging Mode	BRIGHT FIELD
Specimen Holder Model
Nominal Magnification	60000
Calibrated Magnification
Source	TUNGSTEN HAIRPIN
Acceleration Voltage (kV)	100
Imaging Details

EM Software
Task	Software Package	Version
MODEL FITTING	Situs
RECONSTRUCTION	EMAN
RECONSTRUCTION	SPIDER
RECONSTRUCTION	Xmipp

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
	EACH PLATE