8EYP

Joint X-ray/neutron structure of Salmonella typhimurium tryptophan synthase internal aldimine from microgravity-grown crystal

X-RAY DIFFRACTION - NEUTRON DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	LIQUID DIFFUSION	7.8	295	50 mM Bicine pH 7.8, 1 mM EDTA, 0.2 mM PLP, 2 mM spermine, and 6-8% PEG 8000

Crystal Properties
Matthews coefficient	Solvent content
2.68	54.08

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 184.51	α = 90
b = 61.86	β = 94.74
c = 67.67	γ = 90

Symmetry
Space Group	C 1 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	289	PIXEL	DECTRIS EIGER R 4M		2020-01-27	M	SINGLE WAVELENGTH
2	1	neutron	289	IMAGE PLATE	LADI III		2021-07-10	L	LAUE

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.54
2	NUCLEAR REACTOR	ILL BEAMLINE LADI III	2.85-3.8	ILL	LADI III

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	R Split (All)	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	1.8	91.91	93	0.052						26.6	3		65668
2	2.1	52.36	70.1	0.182						10.4	6.8		30993

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	R Merge I (Observed)	R-Sym I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	R Split (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.8	1.86		0.311						2.4	2
2	2.1	2.21		0.41						2	5.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	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	MOLECULAR REPLACEMENT	1.8	29.44			70615	62584	3124	88.6			0.182	0.199	RANDOM	46.29
NEUTRON DIFFRACTION	MOLECULAR REPLACEMENT	2.1	37.6			44653	26890	1341	60.2			0.224	0.288	RANDOM	46.29

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]

RMS Deviations
Key	Refinement Restraint Deviation
x_torsion_deg	28.2
x_torsion_deg	28.2
x_angle_deg	1.1
x_angle_deg	1.1
x_torsion_impr_deg	0.8
x_torsion_impr_deg	0.8
x_bond_d	0.009
x_bond_d	0.009

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4939
Nucleic Acid Atoms
Solvent Atoms	256
Heterogen Atoms	1

Software

Software
Software Name	Purpose
nCNS	refinement
CrysalisPro	data reduction
CrysalisPro	data scaling
LAUEGEN	data reduction
LSCALE	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.