2R2H

Structure of S25-2 in Complex with Ko

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	300	PEG 4000, ethelyene glycol, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 300K

Crystal Properties
Matthews coefficient	Solvent content
2.55	51.73

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 45.8	α = 90
b = 81.3	β = 90
c = 132.35	γ = 90

Symmetry
Space Group	P 21 21 21

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		2007-05-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU	1.54

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	19.97		0.068	10.9	4.15		33258

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)
	2	2.07			0.218	4.5	4.15

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	2	20	33218	1692	97.18	0.217	0.215	0.262	RANDOM	22.808

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]
1.75			-0.88		-0.87

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.489
r_dihedral_angle_4_deg	17.505
r_dihedral_angle_3_deg	14.525
r_dihedral_angle_1_deg	7.09
r_scangle_it	3.672
r_scbond_it	2.733
r_mcangle_it	1.728
r_angle_refined_deg	1.705
r_mcbond_it	1.109
r_nbtor_refined	0.303
r_symmetry_metal_ion_refined	0.221
r_nbd_refined	0.202
r_symmetry_vdw_refined	0.193
r_symmetry_hbond_refined	0.169
r_xyhbond_nbd_refined	0.151
r_chiral_restr	0.111
r_metal_ion_refined	0.065
r_bond_refined_d	0.02
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3355
Nucleic Acid Atoms
Solvent Atoms	268
Heterogen Atoms	22

Software

Software
Software Name	Purpose
d*TREK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
d*TREK	data reduction