1N26

Crystal Structure of the extra-cellular domains of Human Interleukin-6 Receptor alpha chain

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	300	ammonium sulphate, PEG 3350, sodium citrate, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 300K

Crystal Properties
Matthews coefficient	Solvent content
2.72	54.79

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.13	α = 90
b = 51.13	β = 90
c = 303.388	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	IMAGE PLATE	RIGAKU RAXIS II	Yale Mirrors		M	SINGLE WAVELENGTH
2	1	x-ray	100	IMAGE PLATE	RIGAKU RAXIS IV	Monocapillary optics		M	SINGLE WAVELENGTH
3	1	x-ray	100	CCD	ADSC QUANTUM 4	APS BM14C optics		M	SINGLE WAVELENGTH
4	1	x-ray	100	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	MACSCIENCE	1.5418
2	ROTATING ANODE	RIGAKU RUH3R	1.5418
3	SYNCHROTRON	APS BEAMLINE 14-BM-C	1.0	APS	14-BM-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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
1,2,3,4	2.4	50	99.4	0.11	0.07	39	18.6				1	58.3

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)
1,2,3,4	2.35	2.4	100		0.57	3.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	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	MIR	THROUGHOUT	ab initio built into MIR map	2.4	6	15630	15298	731	97.9	0.22	0.22	0.22	0.29	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]
-6.369			-6.369		12.737

RMS Deviations
Key	Refinement Restraint Deviation
c_scangle_it	9.105
c_scbond_it	7.922
c_mcangle_it	7.619
c_mcbond_it	6.394
c_angle_deg	1.96
c_bond_d	0.015

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2360
Nucleic Acid Atoms
Solvent Atoms	83
Heterogen Atoms	137

Software

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

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.