6ZHB | pdb_00006zhb

3D electron diffraction structure of bovine insulin

ELECTRON CRYSTALLOGRAPHY

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2A3G

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 82.4	α = 90
b = 82.4	β = 90
c = 33.46	γ = 120

Symmetry
Space Group	H 3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
ELECTRON CRYSTALLOGRAPHY	MOLECULAR REPLACEMENT	THROUGHOUT	2A3G	3.25	30.3	1019	108	84.36	0.1942	0.1809	0.2065	0.3189	0.333	RANDOM	49.104

Temperature Factor Modeling
Anisotropic B[1][1]	Anisotropic B[1][2]	Anisotropic B[1][3]	Anisotropic B[2][2]	Anisotropic B[2][3]	Anisotropic B[3][3]
-0.19	-0.09		-0.19		0.6

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.04
r_dihedral_angle_3_deg	19.302
r_dihedral_angle_4_deg	18.484
r_dihedral_angle_1_deg	7.43
r_angle_refined_deg	1.034
r_angle_other_deg	0.774
r_chiral_restr	0.048
r_bond_refined_d	0.006
r_gen_planes_refined	0.003
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
PHASER	phasing

Sample
Insulin Zn complex

Specimen Preparation
Sample Aggregation State	3D ARRAY
Vitrification Instrument	HOMEMADE PLUNGER
Cryogen Name	ETHANE
Sample Vitrification Details	Manual plunger

3D Reconstruction
Reconstruction Method	CRYSTALLOGRAPHY
Number of Particles
Reported Resolution (Å)
Resolution Method	DIFFRACTION PATTERN/LAYERLINES
Other Details
Refinement Type
Symmetry Type	3D CRYSTAL
Space Group Name
Length a	82.4
Length b	82.4
Length c	82.4
Angle Alpha	120
Angle Beta	90
Angle Gamma	120

Data Acquisition
Detector Type	OTHER
Electron Dose (electrons/Å**2)	5

Imaging Experiment	1
Date of Experiment
Temperature (Kelvin)
Microscope Model	FEI TALOS ARCTICA
Minimum Defocus (nm)
Maximum Defocus (nm)
Minimum Tilt Angle (degrees)
Maximum Tilt Angle (degrees)
Nominal CS
Imaging Mode	DIFFRACTION
Specimen Holder Model
Nominal Magnification
Calibrated Magnification
Source	FIELD EMISSION GUN
Acceleration Voltage (kV)	200
Imaging Details

EM Software
Task	Software Package	Version
MOLECULAR REPLACEMENT	CCP4 package

Image Processing
CTF Correction Type	CTF Correction Details	Number of Particles Selected	Particle Selection Details
NONE