1XDA

STRUCTURE OF INSULIN

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	Other		unpublished 4-iodophenol insulin dimer

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8.2		HANGING DROP, 0.1M TRI-SODIUM CITRATE, 6% (W/V) TRIS, 0.02% (W/V) ZINC ACETATE, PH 8.2.

Crystal Properties
Matthews coefficient	Solvent content
2.07	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.752	α = 90
b = 78.752	β = 90
c = 79.199	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	120	IMAGE PLATE	MARRESEARCH		1996-06-16	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X31		EMBL/DESY, HAMBURG	X31

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	1.8	15	98	0.055		2.4		16624			17.3

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)
	1.8	1.83	73		0.278

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	4-IODOPHENOL INSULIN DIMER	1.8	15	16624		98	0.174		19.4

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_transverse_tor	24.7
p_staggered_tor	15.7
p_planar_tor	4.5
p_scangle_it	3.03
p_mcangle_it	2.27
p_scbond_it	1.99
p_mcbond_it	1.63
p_multtor_nbd	0.28
p_xyhbond_nbd	0.27
p_singtor_nbd	0.18
p_chiral_restr	0.08
p_angle_d	0.03
p_planar_d	0.03
p_plane_restr	0.02
p_bond_d	0.01
p_angle_deg
p_hb_or_metal_coord
p_xhyhbond_nbd
p_orthonormal_tor
p_special_tor

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1592
Nucleic Acid Atoms
Solvent Atoms	154
Heterogen Atoms	96

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
REFMAC	refinement