2RH9

Tryptophan synthase complexed with IGP, internal aldimine, pH 9.0

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9	293	Protein: 50 mM Bicine pH 7.8, 10 mM Na-EDTA, 1 mM DTE, 20 uM PLP. Reservoir: 50 mM Bicine pH 7.8, 5 mM DTE, 5 mM Na-EDTA, 0.1 M PLP, 2 mM Spermine, 2 mM NaN3, 8-12% PEG 8000. Crystal soaked in 15% PEG 8000, 20% Glycerol, 23 mM IGP, pH controlled at pH 9.0 before flash-cooling, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.54	51.63

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 183.071	α = 90
b = 59.281	β = 94.67
c = 67.345	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	100	CCD	ADSC QUANTUM 4		2000-09-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-3	0.93000	ESRF	ID14-3

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	1.7	55	97.3	0.055	10.01	2.4	77139	77139		-3	19.8

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	1.7	1.8	97.1		0.313	2.46		12104

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	FOURIER SYNTHESIS	THROUGHOUT	1.7	43.73	73246	73246	3922	100	0.17338	0.17338	0.17194	0.20044	RANDOM	20.991

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]
-0.8		-0.41	2.19		-1.46

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.48
r_dihedral_angle_4_deg	19.246
r_dihedral_angle_3_deg	13.281
r_dihedral_angle_1_deg	5.407
r_scangle_it	3.452
r_scbond_it	2.09
r_angle_refined_deg	1.426
r_mcangle_it	1.308
r_angle_other_deg	0.924
r_mcbond_it	0.714
r_symmetry_vdw_other	0.227
r_nbd_refined	0.219
r_nbd_other	0.185
r_mcbond_other	0.18
r_nbtor_refined	0.177
r_symmetry_vdw_refined	0.135
r_xyhbond_nbd_refined	0.131
r_symmetry_hbond_refined	0.115
r_metal_ion_refined	0.098
r_nbtor_other	0.084
r_chiral_restr	0.075
r_bond_refined_d	0.011
r_gen_planes_refined	0.005
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4895
Nucleic Acid Atoms
Solvent Atoms	483
Heterogen Atoms	35

Software

Software
Software Name	Purpose
REFMAC	refinement
ADSC	data collection
XDS	data reduction
XSCALE	data scaling
CNS	phasing