1XZ8

Pyrr, The Regulator Of The Pyrimidine Biosynthetic Operon In Bacillus caldolyticus, Nucleotide-bound form

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.4	298	50mM Na cacodylate,40mM MgCl2,5-6% MPD, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K

Crystal Properties
Matthews coefficient	Solvent content
3.53	31.7

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 128.54	α = 90
b = 128.54	β = 90
c = 128.76	γ = 120

Symmetry
Space Group	H 3 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray						M	SINGLE WAVELENGTH

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.8	50					10213

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB entry 1NON	2.8	50	10265	10213	1053		0.22	0.3	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_angle_deg	1.4
x_bond_d	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2528
Nucleic Acid Atoms
Solvent Atoms	55
Heterogen Atoms	71

Software

Software
Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement
HKL-2000	data reduction