1ECC

ESCHERICHIA COLI GLUTAMINE PHOSPHORIBOSYLPYROPHOSPHATE (PRPP) AMIDOTRANSFERASE COMPLEXED WITH MN-CPRPP AND 5-OXO-NORLEUCINE

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5.8		0.42MM CPRPP, 25MM MNCL2, 40MM BIS-TRIS PH 5.8, 3.2% 2-PROPANOL, 7.5% PEG-3350

Crystal Properties
Matthews coefficient	Solvent content
2.29	46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 78.2	α = 90
b = 78.2	β = 90
c = 308.8	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	IMAGE PLATE	RIGAKU RAXIS IIC		1996-08-15	M

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

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.4	25	88.3	0.036	22.7	2.8		27331		-3	42.9

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.4	2.5	60.3		0.172	3.1

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R	PDB ENTRY 1ECF	2.4	25	35343	1679	88.3	0.176	0.176	0.265	RANDOM, FROM ENTIRE DATA SET	34.3

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]
1.46			1.46		-2.92

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	23.1
x_scangle_it	2.5
x_mcangle_it	2
x_scbond_it	2
x_angle_deg	1.97
x_mcbond_it	1.5
x_improper_angle_d	1.47
x_bond_d	0.012
x_bond_d_na
x_bond_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7732
Nucleic Acid Atoms
Solvent Atoms	291
Heterogen Atoms	69

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
HKL	data reduction
HKL	data scaling
SCALEPACK	data scaling
X-PLOR	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.