Experiment: 4RJY

Crystal structure of E. coli L-Threonine Aldolase in complex with a non-covalently uncleaved bound L-serine substrate

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.6	298	Freshly dialyzed eTA (22 mg/mL in 20 mM potassium phosphate, pH 7.0) was incubated with L-serine (6.25 mM), precipitant solution contains 0.1 M sodium citrate tribasic dihydrate, pH 5.6, 20% v/v 2-propoanol, 20% v/v PEG 4000, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.33	47.31

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 77.16	α = 90
b = 104.88	β = 92.49
c = 84.91	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	IMAGE PLATE	RIGAKU RAXIS IV++		2011-11-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007	1.5417

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	32.8	98	0.093	8.4	2.91		77165	2	2

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	2.18	95.4		0.268	3.8	2.77	7458

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	2.1	30	77165	76865	3871	97.6	0.2787	0.2125	0.2136	0.2787	0.2793	random	27.2876

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]
2.873		0.122	-3.987		1.114

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_d	1.507
c_bond_d	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	10252
Nucleic Acid Atoms
Solvent Atoms	851
Heterogen Atoms	34

Software

Software
Software Name	Purpose
d*TREK	data reduction
CNS	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
d*TREK	data scaling
AMoRE	phasing