Experiment: 2XR0

Room temperature X-ray structure of the perdeuterated Toho-1 R274N R276N double mutant beta-lactamase

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2WYX	PDB ENTRY 2WYX

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		2.0 A AMMONIUM SULFATE, 0.1 M SODIUM CITRATE, PD 5.1. PREPARED IN 99.9% D2O AND MIXED 1:1 WITH PERDEUTERATED PROTEIN PREPARED IN 20 MM NA MES AT PD 6.1 (PH 6.5).

Crystal Properties
Matthews coefficient	Solvent content
2.77	55.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 73.5	α = 90
b = 73.5	β = 90
c = 99.33	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	x-ray	293	CCD	MARRESEARCH MX-300		2010-04-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID		APS	22-ID

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	2.2	29.54	98.6	0.05	31.3	7.5		15962		2	16.86

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	2.2	2.32	97.9		0.83	22	7.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 2WYX	2.2	29.54	1.43	15956	800	98.2	0.135	0.133	0.1322	0.173	0.1695	19.65

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]
-1.0524			-1.0524		2.1047

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.134
f_angle_d	1.122
f_chiral_restr	0.07
f_bond_d	0.009
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1964
Nucleic Acid Atoms
Solvent Atoms	154
Heterogen Atoms	15

Software

Software
Software Name	Purpose
PHENIX	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing