4GW0

Crystal structure of arginine kinase in complex with imino-L-ornithine, MgADP, and nitrate.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1M15	PDB ENTRY 1M15

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	298	Protein at 30 mg/ml, 26% PEG 6000, 0.05M HEPES, 0.1M Magnesium chloride, 0.02M Potassium ADP, 0.25M Sodium nitrate, 0.025M Sodium azide, 0.005M DTT, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.3	46.57

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.184	α = 90
b = 71.103	β = 90
c = 79.962	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	CCD	MAR CCD 165 mm		2002-09-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RUH2R	1.541

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.448	32.485	97.17			13808	13808	1	1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	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	PDB ENTRY 1M15	2.448	32.485	1	13808	13808	406	97.17	0.1792	0.1782	0.21	Used same test set as PDB entry 1M15

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]
-6.394			13.7961		-7.4022

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	14.562
f_angle_d	0.833
f_chiral_restr	0.058
f_bond_d	0.007
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2817
Nucleic Acid Atoms
Solvent Atoms	182
Heterogen Atoms	44

Software

Software
Software Name	Purpose
CrystalClear	data collection
PHENIX	model building
PHENIX	refinement
DENZO	data reduction
SCALEPACK	data scaling
PHENIX	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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 R01GM157729.