1M5A

Crystal Structure of 2-Co(2+)-Insulin at 1.2A Resolution

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	4INS	PDB entry 4INS

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	SLOW COOLING	6.3	300	cobalt acetate, trisodium citrate, acetone, hydrochloric acid, pH 6.3, SLOW COOLING, temperature 300K

Crystal Properties
Matthews coefficient	Solvent content
1.82	32.51

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 80.75	α = 90
b = 80.75	β = 90
c = 33.63	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	x-ray	100	IMAGE PLATE	MARRESEARCH	mirror, monochromator	1994-10-15	M	SINGLE WAVELENGTH
2	1	x-ray	100	IMAGE PLATE	MARRESEARCH	mirror, monochromator	1994-12-22	M	SINGLE WAVELENGTH
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX7.2	1.488	SRS	PX7.2
2	SYNCHROTRON	SRS BEAMLINE PX9.6	0.87	SRS	PX9.6

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	1.2	20	99.1	0.075		2.86	25860	25345	3	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	1.2	1.28	94.7		0.354		2.4

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB entry 4INS	1.2	20	3	25345	25345	1267	99.1	0.188	0.185	0.1812	0.2412	random

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
p_angle_d	5.6
p_bond_d	0.051

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	806
Nucleic Acid Atoms
Solvent Atoms	197
Heterogen Atoms	2

Software

Software
Software Name	Purpose
PXGEN	data collection
ROTAVATA	data reduction
AMoRE	phasing
PROLSQ	refinement
PXGEN	data reduction
CCP4	data scaling
ROTAVATA	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.