4H7A

Crystal structure of CasB from Thermus thermophilus

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.7	291.5	0.1M MES, pH 5.7-5.9, 50 mM MgSO4, 5% (w/v) PEG 3350, VAPOR DIFFUSION, HANGING DROP, temperature 291.5K

Crystal Properties
Matthews coefficient	Solvent content
2.77	55.65

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.777	α = 90
b = 100.777	β = 90
c = 84.862	γ = 90

Symmetry
Space Group	P 43 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	ADSC QUANTUM 210		2011-10-31	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	CHESS BEAMLINE A1	0.9770	CHESS	A1

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	2.6	30	92.7				12996	2	2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.6	2.64	86.8

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	PDB ENTRY 2ZCA	2.6	30	12973	638	92.75	0.176	0.1734	0.2299	RANDOM	64.2504

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]
1.49			1.49		-2.98

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_bonded	43.107
r_dihedral_angle_2_deg	28.899
r_dihedral_angle_4_deg	25.974
r_dihedral_angle_3_deg	24.194
r_sphericity_free	14.346
r_rigid_bond_restr	13.924
r_dihedral_angle_1_deg	3.809
r_angle_refined_deg	1.426
r_chiral_restr	0.11
r_bond_refined_d	0.021
r_gen_planes_refined	0.01

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2539
Nucleic Acid Atoms
Solvent Atoms	10
Heterogen Atoms

Software

Software
Software Name	Purpose
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling