3L2B

Crystal structure of the CBS and DRTGG domains of the regulatory region of Clostridium perfringens pyrophosphatase complexed with activator, diadenosine tetraphosphate

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	298	25% PEG 4000, 100mM Tris/HCl pH 8.5, 200mM LiSO4, 0.25mM Ap4A, vapor diffusion, hanging drop, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.47	50.2

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.847	α = 90
b = 71.764	β = 90
c = 116.334	γ = 90

Symmetry
Space Group	P 21 21 21

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	ADSC Quantum Q315r		2008-04-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID29	0.979260	ESRF	ID29

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.27	20	98.8	0.053	0.053	19.78	7	24554	24554		-3	55.681

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.31	2.44	95.5		0.374	0.374	4.6	6.9	3736

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	3L31	2.27	19.99	23255	1298	97.24	0.21123	0.20865	0.25875	RANDOM	45.19

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]
4.48			-1.22		-3.26

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.399
r_dihedral_angle_4_deg	20.855
r_dihedral_angle_3_deg	14.524
r_dihedral_angle_1_deg	5.995
r_scangle_it	3.193
r_scbond_it	2.042
r_mcangle_it	1.347
r_angle_refined_deg	1.341
r_angle_other_deg	1.219
r_mcbond_it	0.716
r_mcbond_other	0.133
r_chiral_restr	0.073
r_bond_refined_d	0.013
r_gen_planes_refined	0.006
r_gen_planes_other	0.002
r_bond_other_d	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3551
Nucleic Acid Atoms
Solvent Atoms	74
Heterogen Atoms	53

Software

Software
Software Name	Purpose
XSCALE	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data scaling
XDS	data reduction