6KTQ

Crystal structure of catalytic domain of homocitrate synthase from Sulfolobus acidocaldarius (SaHCS(dRAM)) in complex with alpha-ketoglutarate/Zn2+/CoA

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	0.1 M HEPES-NaOH, pH 7.5, 1.0 M (NH4)2SO4, 2% PEG 400

Crystal Properties
Matthews coefficient	Solvent content
2.7	54.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 114.693	α = 90
b = 114.693	β = 90
c = 125.713	γ = 120

Symmetry
Space Group	P 32 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	95	PIXEL	DECTRIS PILATUS3 S 6M		2016-11-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PHOTON FACTORY BEAMLINE BL-5A	1.0	Photon Factory	BL-5A

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (Observed)	Rpim I (All)	CC (Half)	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	1.98	125.71	100	0.095	0.031	0.999	28.3	10.1		66792

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.98	2.03			0.658	0.222	0.911

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	2ZTJ	1.98	125.71	63520	3233	99.9	0.1763	0.1743	0.2157	RANDOM	35.851

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

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.527
r_dihedral_angle_4_deg	18.617
r_dihedral_angle_3_deg	16.083
r_dihedral_angle_1_deg	5.676
r_angle_refined_deg	1.535
r_angle_other_deg	0.82
r_chiral_restr	0.138
r_bond_refined_d	0.01
r_gen_planes_refined	0.006
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	32.527
r_dihedral_angle_4_deg	18.617
r_dihedral_angle_3_deg	16.083
r_dihedral_angle_1_deg	5.676
r_angle_refined_deg	1.535
r_angle_other_deg	0.82
r_chiral_restr	0.138
r_bond_refined_d	0.01
r_gen_planes_refined	0.006
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6234
Nucleic Acid Atoms
Solvent Atoms	343
Heterogen Atoms	174

Software

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

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.