4HST

Crystal structure of a double mutant of a class III engineered cephalosporin acylase

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8.5	291	10-20% PEG8000, 10 mM Tris-HCl, pH 8.0-8.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
3.04	59.52

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 68.385	α = 90
b = 77.845	β = 90
c = 191.99	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 315r		2009-03-28	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	AUSTRALIAN SYNCHROTRON BEAMLINE MX2	0.95663	Australian Synchrotron	MX2

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	1.571	95.995	93.7	0.095	16.1	12	133919	133919			15.188

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	1.571	95.995	127103	127103	6723	93.4	0.12145	0.12145	0.11931	0.16225	RANDOM	15.178

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]
-0.17			0.19		-0.02

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	43.013
r_dihedral_angle_2_deg	31.656
r_dihedral_angle_4_deg	18.771
r_sphericity_bonded	14.145
r_dihedral_angle_3_deg	12.566
r_rigid_bond_restr	7.343
r_dihedral_angle_1_deg	6.124
r_angle_refined_deg	2.22
r_chiral_restr	0.298
r_bond_refined_d	0.027

RMS Deviations
Key	Refinement Restraint Deviation
r_sphericity_free	43.013
r_dihedral_angle_2_deg	31.656
r_dihedral_angle_4_deg	18.771
r_sphericity_bonded	14.145
r_dihedral_angle_3_deg	12.566
r_rigid_bond_restr	7.343
r_dihedral_angle_1_deg	6.124
r_angle_refined_deg	2.22
r_chiral_restr	0.298
r_bond_refined_d	0.027
r_gen_planes_refined	0.015

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5751
Nucleic Acid Atoms
Solvent Atoms	976
Heterogen Atoms	10

Software

Software
Software Name	Purpose
Blu-Ice	data collection
SHELXS	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	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.