3K0Z

Crystal structure of Putative polyketide cyclase (NP_977253.1) from BACILLUS CEREUS ATCC 10987 at 1.91 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	9.5	277	30.0000% PEG-3000, 0.1M CHES pH 9.5, NANODROP, VAPOR DIFFUSION, SITTING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.19	43.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 37.829	α = 90
b = 77.414	β = 90
c = 109.02	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	MARMOSAIC 325 mm CCD	Flat collimating mirror, toroid focusing mirror	2009-05-13	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-2	0.97932,0.97918,0.91837	SSRL	BL9-2

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	1.91	28.843	96.3	0.075	8.98			25195		-3	17.797

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	1.91	1.98	79.9		0.453	1.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	1.91	28.843	25167	1269	98.3	0.173	0.17	0.219	RANDOM	25.436

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]
-0.27			-0.99		1.27

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.873
r_dihedral_angle_3_deg	11.94
r_dihedral_angle_4_deg	7.012
r_scangle_it	6.544
r_scbond_it	4.803
r_dihedral_angle_1_deg	4.785
r_mcangle_it	2.812
r_mcbond_it	2.193
r_angle_refined_deg	1.645
r_angle_other_deg	1.038
r_mcbond_other	0.651
r_symmetry_hbond_refined	0.238
r_symmetry_vdw_refined	0.235
r_xyhbond_nbd_refined	0.204
r_nbd_refined	0.202
r_symmetry_vdw_other	0.196
r_nbd_other	0.18
r_nbtor_refined	0.177
r_chiral_restr	0.105
r_nbtor_other	0.089
r_bond_refined_d	0.019
r_gen_planes_refined	0.007
r_bond_other_d	0.002
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2342
Nucleic Acid Atoms
Solvent Atoms	319
Heterogen Atoms	26

Software

Software
Software Name	Purpose
REFMAC	refinement
PHENIX	refinement
SHELX	phasing
MolProbity	model building
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SHELXD	phasing