3FHP

A neutron crystallographic analysis of a porcine 2Zn insulin at 2.0 A resolution

NEUTRON DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIQUID DIFFUSION	6.3	293	2.3mg/ml insulin, 50mM sodium citrate, 6mM zinc acetate, 17% acetone, pH6.3, LIQUID DIFFUSION, temperature 293K

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 82.849	α = 90
b = 82.849	β = 90
c = 34.173	γ = 120

Symmetry
Space Group	H 3

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	neutron	298	IMAGE PLATE	MACSCIENCE		2006-05-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	NUCLEAR REACTOR	JRR-3M BEAMLINE 1G-B	2.6	JRR-3M	1G-B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Net I Over Average Sigma (I)	Redundancy	Number Reflections (All)	Number Reflections (Observed)	Observed Criterion Sigma (F)	Observed Criterion Sigma (I)	B (Isotropic) From Wilson Plot
1	2	80	23.2	0.147		2.2	4824	4824			8.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.07	81.3		0.393		2.2	4824

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
NEUTRON DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 4INS	2	41.43	3	4030	208	68.1	0.168	0.168	0.247	RANDOM	23.8

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]
0.38	1.58		0.38		-0.76

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.8
c_improper_angle_d	7.75
c_mcangle_it	2.35
c_scangle_it	2.32
c_angle_deg	1.7
c_scbond_it	1.52
c_mcbond_it	1.5
c_bond_d	0.008
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	806
Nucleic Acid Atoms
Solvent Atoms	89
Heterogen Atoms	2

Software

Software
Software Name	Purpose
DENZO	data reduction
XFIT	data reduction
CNS	refinement
SCALEPACK	data scaling
CNS	phasing