7P52

GlnK1 from Methanocaldococcus jannaschii with Mg-ATP and 2-oxoglutarate at a resolution of 1.2 A

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	291.15	GlnK1 was crystallized at 11.2 mg/ml in 25 mM Tris/HCl pH 7.6, 10% glycerol, 2mM dithiothreitol and 500mM NaCl on 96-Well MRC 2-Drop Crystallization Plates in polystyrene (SWISSCI). GlnK1 was cocrystallized with 2 mM ATP, 2 mM 2-oxoglutarate and 2 mM MgCl2. Drop of 0.6 ul of protein sample was mixed with 0.6 ul of the crystallization solution. The reservoir contained 90 ul of the following crystallization solution: 20% PEG 3,350, 100 mM Bis-Tris propane pH 8.5 and 200 mM sodium nitrate.

Crystal Properties
Matthews coefficient	Solvent content
3	58.97

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.053	α = 90
b = 89.053	β = 90
c = 98.059	γ = 120

Symmetry
Space Group	H 3 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS PILATUS 2M-F		2020-02-25	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06DA	0.99187	SLS	X06DA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	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	1.2	44.5265	89.8	0.057	0.06	0.02	0.999	17.8	9.4		31673

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.2	1.24	99.6		1.209	1.29	0.443	0.642	1.7	8.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2J9D	1.20002	44.5265	1.35	31668	1550	67.74	0.1324	0.1311	0.1554	21.9875

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	878
Nucleic Acid Atoms
Solvent Atoms	178
Heterogen Atoms	52

Software

Software
Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
autoPROC	data reduction
autoPROC	data scaling
MOLREP	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 R01GM133198.