Experiment: 2XEZ

Crystal structure of checkpoint kinase 1 (Chk1) in complex with inhibitors

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2WMW	PDB ENTRY 2WMW

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				DL-MALIC ACID/PEG3350

Crystal Properties
Matthews coefficient	Solvent content
2.7	54.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 44.84	α = 90
b = 65.6	β = 95.11
c = 57.45	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	RIGAKU CCD		2006-05-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF

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	2.25	44.7	96.4	0.08	8.6	2.6		15276		1.5	37.53

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	2.25	2.37	98.6		0.48	1.6	2.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 2WMW	2.25	36.918	1.34	15253	736	96.11	0.2114	0.2102	0.2041	0.2375	0.233

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]
-9.5666		1.419	-2.2871		11.8537

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	17.717
f_angle_d	1.081
f_chiral_restr	0.095
f_bond_d	0.01
f_plane_restr	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2039
Nucleic Acid Atoms
Solvent Atoms	67
Heterogen Atoms	43

Software

Software
Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing