3FC1

Crystal structure of p38 kinase bound to pyrimido-pyridazinone inhibitor

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	293	10 mg/mL Protein, 20 % PEG 3350, 0.1 M Tris-HCl pH 7.0, 50 mM MgCl2, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.88	57.33

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 45.697	α = 90
b = 85.958	β = 90
c = 123.271	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	110	IMAGE PLATE	RIGAKU RAXIS IV		1999-03-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH3R	1.5418

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	2.4	20	95.2	0.069	8	3		18713

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	2.4	2.49			0.273	3	3

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	2.4	19.98	16861	1834	95.24	0.20401	0.1989	0.25083	RANDOM	34.826

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]
0.02			-0.56		0.55

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.234
r_dihedral_angle_4_deg	18.42
r_dihedral_angle_3_deg	14.465
r_dihedral_angle_1_deg	5.643
r_scangle_it	1.914
r_scbond_it	1.198
r_angle_refined_deg	1.169
r_mcangle_it	0.971
r_mcbond_it	0.555
r_nbtor_refined	0.303
r_nbd_refined	0.198
r_symmetry_vdw_refined	0.192
r_xyhbond_nbd_refined	0.141
r_symmetry_hbond_refined	0.095
r_chiral_restr	0.074
r_bond_refined_d	0.009
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2675
Nucleic Acid Atoms
Solvent Atoms	133
Heterogen Atoms	29

Software

Software
Software Name	Purpose
CrystalClear	data collection
X-PLOR	model building
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing