2OMH

Structure of human insulin cocrystallized with ARG-12 peptide in presence of urea

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.3	291	500mM NaCl, 2.5M urea, 1.2mg/ml ARG-12 peptide, 50mM resorcinol, 50mM phosphate buffer, pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
2.31	46.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.36	α = 90
b = 61.36	β = 90
c = 85.6	γ = 90

Symmetry
Space Group	P 43 21 2

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	MARMOSAIC 225 mm CCD		2004-10-07	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	1.36	50	96.9	0.058	12.3	5.3	35834	34738			24.3

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	1.36	1.4	98.8		0.61	2.2	4.2	2933

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 trimer R conformation	1.36	14.95	32948	1739	96.97	0.20136	0.20022	0.22274	RANDOM	22.684

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]
0.01			0.01		-0.03

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.389
r_dihedral_angle_3_deg	11.402
r_dihedral_angle_4_deg	6.699
r_dihedral_angle_1_deg	5.37
r_scangle_it	2.911
r_scbond_it	1.827
r_mcangle_it	1.291
r_angle_refined_deg	1.112
r_mcbond_it	0.656
r_nbtor_refined	0.311
r_nbd_refined	0.233
r_symmetry_vdw_refined	0.22
r_symmetry_hbond_refined	0.209
r_metal_ion_refined	0.183
r_xyhbond_nbd_refined	0.168
r_chiral_restr	0.091
r_bond_refined_d	0.008
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1163
Nucleic Acid Atoms
Solvent Atoms	165
Heterogen Atoms	49

Software

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