5AVM

Crystal structures of 5-aminoimidazole ribonucleotide (AIR) synthetase, PurM, from Thermus thermophilus

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	293	1.0 M (NH4)2SO4

Crystal Properties
Matthews coefficient	Solvent content
3.92	68.66

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 142.328	α = 90
b = 142.63	β = 90
c = 218.616	γ = 90

Symmetry
Space Group	P 21 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	100	CCD	RIGAKU JUPITER 210		2004-11-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SPRING-8 BEAMLINE BL38B1	1.0	SPring-8	BL38B1

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	50	99.6	0.087	17.4	6.5		224495

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)
1	2.2	2.28	98.5		0.288	4.5	5.7

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	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2BTU	2.2	50	217248	20886	96.6	0.163	0.163	0.215	RANDOM	30.32

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]
-0.114			-0.391		0.504

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.68
c_scangle_it	2.725
c_scbond_it	1.791
c_mcangle_it	1.765
c_angle_d	1.318
c_mcbond_it	1.065
c_improper_angle_d	0.889
c_bond_d	0.006
c_bond_d_na
c_bond_d_prot
c_angle_d_na
c_angle_d_prot
c_angle_deg
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	16868
Nucleic Acid Atoms
Solvent Atoms	1767
Heterogen Atoms	85

Software

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