Experiment: 3ECS

Crystal structure of human eIF2B alpha

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.5	293	0.1M Sodium Citrate buffer(pH 4.5), 0.1M Ammonium Sulfate, 13% polyethylene glycol(PEG) 4000, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.71	54.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.885	α = 90
b = 156.394	β = 104.2
c = 138.441	γ = 90

Symmetry
Space Group	P 1 21 1

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	ADSC QUANTUM 315	mirrors	2008-02-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL41XU		SPring-8	BL41XU

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	2.65	50	99.9	0.181	0.181	16.7	13.9	84757	84588		-3	39

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.65	2.7	99.2		0.806	0.806	2	8.7	4166

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	2.65	50	84757	84095	4200	99.2	0.214	0.2139	0.273	0.273	RANDOM	49.4

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]
5.11	5.78	10.89		-9.79

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	22.4
c_mcangle_it	5.96
c_mcbond_it	4.13
c_angle_deg	1.4
c_improper_angle_d	0.84
c_bond_d	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	17722
Nucleic Acid Atoms
Solvent Atoms	185
Heterogen Atoms	51

Software

Software
Software Name	Purpose
HKL-2000	data collection
autoSHARP	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling