Experiment: 2QGF

Structure of regulatory chain mutant H20A of asparate transcarbamoylase from E. coli

X-RAY DIFFRACTION

Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICRODIALYSIS	5.7	298	0.1M citric acid, pH 5.7, MICRODIALYSIS, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
2.99	58.86

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 122.28	α = 90
b = 122.28	β = 90
c = 142.49	γ = 120

Symmetry
Space Group	P 3 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	AREA DETECTOR	UCSD MARK II		1996-11-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	2.2	35		0.099		3.3	59318	59318

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1NBE	2.2	35	59318	59318			0.197	0.197	0.2105	0.223	RANDOM

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
x_dihedral_angle_d	25.7
x_angle_deg	1.7
x_improper_angle_d	1.6
x_bond_d	0.014

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7222
Nucleic Acid Atoms
Solvent Atoms	430
Heterogen Atoms	2

Software

Software
Software Name	Purpose
SDMS	data collection
X-PLOR	model building
X-PLOR	refinement
SDMS	data reduction
SDMS	data scaling
X-PLOR	phasing