3T41

1.95 Angstrom Resolution Crystal Structure of Epidermin Leader Peptide Processing Serine Protease (EpiP) S393A Mutant from Staphylococcus aureus

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	295	Protein solution: 7.8 mG/mL, 0.25M Sodium chloride, 0.01M Tris HCl (pH 8.3), Screen solution: PACT (D11), 0.2M Calcium chloride, 0.1M Tris (pH 8.0), 20% w/v PEG 6000, VAPOR DIFFUSION, SITTING DROP, temperature 295K

Crystal Properties
Matthews coefficient	Solvent content
2.26	45.58

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 71.234	α = 90
b = 68.473	β = 91.66
c = 97.723	γ = 90

Symmetry
Space Group	P 1 21 1

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	Beryllium lenses	2011-04-21	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)	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	1.95	30	98	0.045	25.5	3.8	67885	67885		-3	32.7

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	1.95	1.98	97.8		0.473	3	3.9	3419

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	3QFH	1.95	29.94	63887	63887	3416	97.98	0.16749	0.16749	0.16597	0.19477	RANDOM	37.031

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]
-1.92		1.88	0.52		1.5

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.031
r_dihedral_angle_3_deg	9.445
r_dihedral_angle_4_deg	8.481
r_scangle_it	4.792
r_scbond_it	3.065
r_dihedral_angle_1_deg	2.577
r_mcangle_it	1.88
r_angle_refined_deg	1.377
r_mcbond_it	1.112
r_angle_other_deg	0.851

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.031
r_dihedral_angle_3_deg	9.445
r_dihedral_angle_4_deg	8.481
r_scangle_it	4.792
r_scbond_it	3.065
r_dihedral_angle_1_deg	2.577
r_mcangle_it	1.88
r_angle_refined_deg	1.377
r_mcbond_it	1.112
r_angle_other_deg	0.851
r_mcbond_other	0.366
r_chiral_restr	0.087
r_bond_refined_d	0.011
r_gen_planes_refined	0.005
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6606
Nucleic Acid Atoms
Solvent Atoms	487
Heterogen Atoms	7

Software

Software
Software Name	Purpose
Blu-Ice	data collection
PHASER	phasing
REFMAC	refinement
HKL-3000	data reduction
HKL-3000	data scaling

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.