Experiment: 1I5O

CRYSTAL STRUCTURE OF MUTANT R105A OF E. COLI ASPARTATE TRANSCARBAMOYLASE

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5AT1

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	MICRODIALYSIS	5.7	293	Tris buffer, maleic acid, pH 5.7, MICRODIALYSIS, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.99	58.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 122.25	α = 90
b = 122.25	β = 90
c = 142.67	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	295	AREA DETECTOR	UCSD MARK II		1996-07-25	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	2.78	30	93	0.099	5.75	3.08	29390	29390			26.54

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.78	2.99	75		0.37	1	1.85	4622

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	5at1	2.8	10	1	2	29390	23744	2172	77	0.157	0.155	0.1989	0.212	4 random sets	31.2

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	24.3
x_angle_deg	1.95
x_improper_angle_d	1.33
x_bond_d	0.017

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7220
Nucleic Acid Atoms
Solvent Atoms	296
Heterogen Atoms	18

Software

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