5K4T

Three-dimensional structure of L-threonine 3-dehydrogenase from Trypanosoma brucei refined to 2.1 angstroms

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		298	0.1M MES, 0.2M ammonium sulphate, 30% PEG w/v 5000 MME

Crystal Properties
Matthews coefficient	Solvent content
2.75	55.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 91.759	α = 90
b = 91.759	β = 90
c = 93.598	γ = 90

Symmetry
Space Group	P 43 21 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS PILATUS 2M		2011-08-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04-1	0.9173	Diamond	I04-1

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	29.073	99.93	0.054	33.6	12.6		22705

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2.1	29.07	22705	1229	99.93	0.1637	0.161	0.2163	RANDOM	29.747

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]
-0.01			-0.01		0.03

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.979
r_dihedral_angle_4_deg	20.346
r_dihedral_angle_3_deg	15.05
r_dihedral_angle_1_deg	7.296
r_mcangle_it	3.912
r_mcbond_it	2.619
r_mcbond_other	2.619
r_angle_refined_deg	2.004
r_angle_other_deg	0.954
r_chiral_restr	0.127

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.979
r_dihedral_angle_4_deg	20.346
r_dihedral_angle_3_deg	15.05
r_dihedral_angle_1_deg	7.296
r_mcangle_it	3.912
r_mcbond_it	2.619
r_mcbond_other	2.619
r_angle_refined_deg	2.004
r_angle_other_deg	0.954
r_chiral_restr	0.127
r_bond_refined_d	0.019
r_gen_planes_refined	0.009
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2511
Nucleic Acid Atoms
Solvent Atoms	158
Heterogen Atoms	48

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
xia2	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 R01GM157729.