ISDA

8OOW

X-RAY DIFFRACTION

Crystallization Details

Method	pH	Temprature	Details
X-RAY DIFFRACTION	7.6	293.15	The protein was crystallized fresh without any freezing step, and obtained through the sitting drop method on a 96-Well MRC 2-Drop Crystallization Plates in polystyrene (SWISSCI, United Kingdom) under anaerobic conditions (N2:H2, gas ratio of 97:3). Crystallization was performed at 9 mg/ml glutamine synthetase in 25 mM Tris/HCl pH 7.6, 10% glycerol, and 2 mM dithiothreitol. The reservoir contained 90 ul precipitant the following crystallization solution: 200 mM ammonium formate and 20 % (w/v) polyethylene glycol 3,350. 0.55 uL protein was mixed with 0.55 uL precipitant. Crystals were soaked in mother liquor with 25% v/v ethylene glycol before freezing in liquid nitrogen.

Unit Cell:

a: 130.920 Å b: 195.646 Å c: 133.443 Å α: 90.00° β: 94.71° γ: 90.00°

Symmetry:

Space Group: P 1 21 1

Crystal Properties:

Matthew's Coefficient: 2.87 Solvent Content: 57.11

Refinement Statistics

Diffraction ID	Structure Solution Method	Cross Validation Method	Resolution Limit (High)	Resolution Limit (Low)	Number of Reflections (Observed)	Number of Reflections (R-free)	Percent Reflections (Observed)	R-Work	R-Free	Mean Isotropic
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	2.64	62.96	123529	6181	62.77	0.1931	0.2252	72.24

Data Collection

Overall

Resolution Limit (High)	Resolution Limit (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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
2.636	109.987	90.3	0.076	?	15.5	5.7	?	123574	?	?	66.8

Highest Resolution Shell

#	Resolution Limits (Low)	Resolution Limits (High)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.636	2.933	78.7	?	?	1.6	4.4	?

Diffraction

Diffraction experiment

Crystal ID	Scattering Type	Data Collection Temprature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1		100 K			?

Radiation Source

Source	Type	Wavelength List	Synchrotron Site	Beamline
SYNCHROTRON	SLS BEAMLINE X06DA	1.00004	SLS	X06DA

Software