Experiment: 1A9X

CARBAMOYL PHOSPHATE SYNTHETASE: CAUGHT IN THE ACT OF GLUTAMINE HYDROLYSIS

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7.4		0.65M NET4CL 8% PEG 8000 100MM KCL 2.5MM MNCL2 2.5MM ADP 2.5MM ORNITHINE 5MM GLUTAMINE 25MM HEPES PH 7.4 THEN SOAKED INTO: 1.4M NET4CL 8% PEG 8000 250MM KCL 2.5MM MNCL2 2.5MM ADP 2.5MM ORNITHINE 5MM GLUTAMINE 25MM HEPES PH 7.4 7.5% ETHYLENE GLYCOL

Crystal Properties
Matthews coefficient	Solvent content
3.25	62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 152.1	α = 90
b = 164.4	β = 90
c = 332.3	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	120	CCD	BRUKER		1997-11-10	M

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 17-ID		APS	17-ID

Data Collection

Overall
ID #	Resolution (High)	Resolution (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
1	1.8	30	92	0.065	0.065	23.8	2.4		700998

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.8	1.88	91		0.275	0.275	4	2

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Work (Depositor)	R-Free (Depositor)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	1JDB	1.8	30	700998	700998		92	0.191

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]

RMS Deviations
Key	Refinement Restraint Deviation
t_dihedral_angle_d	17.7
t_angle_deg	2.52
t_nbd	0.032
t_bond_d	0.014
t_gen_planes	0.01
t_trig_c_planes	0.008
t_incorr_chiral_ct
t_pseud_angle
t_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	44248
Nucleic Acid Atoms
Solvent Atoms	4528
Heterogen Atoms	435

Software

Software
Software Name	Purpose
AMoRE	phasing
TNT	refinement
SAINT	data reduction
XCALIBRE	data scaling