3MI3

Homocitrate Synthase Lys4 bound to Lysine

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.8	297	Sodium and potassium phosphate, pH 5.8, VAPOR DIFFUSION, HANGING DROP, temperature 297K

Crystal Properties
Matthews coefficient	Solvent content
3.48	64.65

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 135.637	α = 90
b = 135.637	β = 90
c = 122.928	γ = 120

Symmetry
Space Group	P 62

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	MARMOSAIC 300 mm CCD		2008-04-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 21-ID-G	0.97856	APS	21-ID-G

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	2.38	40	98	0.057	0.057	35.7	9	50397	50397	-3	-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.38	2.47	89.1		0.472	0.472	3.02	6.7	4532

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	PDB entry 3IVS	2.38	38.69	50367	2556	98.02	0.171	0.17	0.203	RANDOM	54.541

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]
-0.31	-0.15		-0.31		0.46

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.73
r_dihedral_angle_4_deg	18.678
r_dihedral_angle_3_deg	15.157
r_dihedral_angle_1_deg	5.908
r_scangle_it	3.11
r_scbond_it	1.907
r_angle_refined_deg	1.385
r_mcangle_it	1.11
r_mcbond_it	0.577
r_nbtor_refined	0.298
r_symmetry_hbond_refined	0.292
r_symmetry_vdw_refined	0.204
r_nbd_refined	0.203
r_xyhbond_nbd_refined	0.152
r_symmetry_metal_ion_refined	0.127
r_metal_ion_refined	0.102
r_chiral_restr	0.092
r_bond_refined_d	0.013
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5646
Nucleic Acid Atoms
Solvent Atoms	284
Heterogen Atoms	24

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing