6CXD

Crystal structure of peptidase B from Yersinia pestis CO92 at 2.75 A resolution

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3IJ3	PDB entry 3IJ3

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6.5	289	0.2 uL 14 mg/mL protein in 20 mM Tris-HCl pH 7.5, 150 mM sodium chloride, 10% glycerol, 0.1% sodium azide, 0.5 mM TCEP, 1 mM ZnCl2 + 0.2 uL TOP96 #29 (0.2 M ammonium sulfate, 0.1 M sodium cacodylate, 30% w/v PEG8000) against 1.5 M sodium chloride, 96-well 3-drop crystallization plate (Swissci)

Crystal Properties
Matthews coefficient	Solvent content
2.42	49.16

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 101.558	α = 90
b = 101.558	β = 90
c = 240.475	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	100	CCD	MARMOSAIC 300 mm CCD		2016-04-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-G	0.97856	APS	21-ID-G

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	2.75	50	99.5	0.152	0.152	16.5	10.8		12769		-3	60.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.75	2.8	94.8		0.666	0.666	0.928	1.8	5.9

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 3IJ3	2.75	50	11976	600	98.5	0.18097	0.17761	0.24925	RANDOM	53.504

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]
0.54	0.27		0.54		-1.74

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.706
r_dihedral_angle_3_deg	14.099
r_dihedral_angle_4_deg	11.756
r_long_range_B_other	8.322
r_long_range_B_refined	8.319
r_dihedral_angle_1_deg	5.853
r_scangle_other	5.746
r_mcangle_other	5.28
r_mcangle_it	5.277
r_scbond_it	4.208
r_scbond_other	3.792
r_mcbond_it	3.478
r_mcbond_other	3.464
r_angle_refined_deg	1.032
r_angle_other_deg	0.728
r_chiral_restr	0.058
r_bond_refined_d	0.006
r_gen_planes_refined	0.003
r_bond_other_d	0.001
r_gen_planes_other	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_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3163
Nucleic Acid Atoms
Solvent Atoms	33
Heterogen Atoms	30

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-3000	data reduction
DENZO	data reduction
HKL-3000	data scaling
SCALEPACK	data scaling
HKL-3000	phasing
MOLREP	phasing
PDB_EXTRACT	data extraction