2OM0

Structure of human insulin in presence of urea at pH 6.5

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	291	2M NaCl, 3M urea, 100mM phosphate buffer, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
3.45	64.35

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.936	α = 90
b = 219.318	β = 90
c = 223.674	γ = 90

Symmetry
Space Group	C 2 2 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	CCD	MAR CCD 165 mm		2005-05-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MAX II BEAMLINE I911-2	1.0	MAX II	I911-2

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	2.05	50	99.9	0.086	11.6	4.9	91370	91251			36.3

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	2.05	2.1	100		0.393	3.2	3.7	6331

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	insulin hexamer R6 conformation	2.05	28.31	86749	4536	99.95	0.18638	0.18428	0.22714	RANDOM	32.194

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]

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.437
r_dihedral_angle_3_deg	13.482
r_dihedral_angle_4_deg	10.967
r_dihedral_angle_1_deg	8.89
r_scangle_it	3.768
r_scbond_it	2.616
r_mcangle_it	1.862
r_angle_refined_deg	1.557
r_mcbond_it	1.21
r_symmetry_hbond_refined	0.34
r_nbtor_refined	0.306
r_xyhbond_nbd_refined	0.221
r_nbd_refined	0.218
r_symmetry_vdw_refined	0.209
r_metal_ion_refined	0.161
r_chiral_restr	0.142
r_bond_refined_d	0.016
r_gen_planes_refined	0.007

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7115
Nucleic Acid Atoms
Solvent Atoms	628
Heterogen Atoms	204

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
MOLREP	phasing