5KSC

E166A/R274N/R276N Toho-1 Beta-lactamase aztreonam acyl-enzyme intermediate

NEUTRON DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	BATCH MODE	6.1	293.15	300 microliters of a 10 mg/ml protein concentration in a solution containing 2.0 M ammonium sulfate and 0.1 M sodium citrate (pH 6.1) prepared in D2O.

Crystal Properties
Matthews coefficient	Solvent content
1.97	54.43

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 73.296	α = 90
b = 73.296	β = 90
c = 99.093	γ = 120

Symmetry
Space Group	P 32 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	neutron	293	AREA DETECTOR	ORNL ANGER CAMERA		2015-03-03	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	NUCLEAR REACTOR	ORNL Spallation Neutron Source BEAMLINE MANDI	2-4	ORNL Spallation Neutron Source	MANDI

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	2.1	14.73	71.5	0.16	10.1	3.1		13173

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	2.1	2.17	50.1		0.26	4.2	2

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
NEUTRON DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	2.1	10	13173		72.1	0.24	0.28	RANDOM

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]

Coordinate Error
Structure Solution Method	Refinement High Resolution	Refinement Low Resolution
	2024	2011.8

RMS Deviations
Key	Refinement Restraint Deviation
s_bond_d	0.0074
s_angle_d
s_similar_dist
s_from_restr_planes
s_zero_chiral_vol
s_non_zero_chiral_vol
s_anti_bump_dis_restr
s_rigid_bond_adp_cmpnt
s_similar_adp_cmpnt
s_approx_iso_adps

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1966
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	105

Software

Software
Software Name	Purpose
Mantid	data processing
SHELX	refinement
SHELX	phasing
SHELXL-97	refinement

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 R01GM157729.