7N2T

O-acetylserine sulfhydrylase from Citrullus vulgaris in the internal aldimine state, with citrate bound

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	4.2	293	29% PEG 300, 0.25 mM Citrate, 0.25 mM potassium phosphate pH 4.2

Crystal Properties
Matthews coefficient	Solvent content
2.9	57.55

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 97.207	α = 90
b = 63.591	β = 91.45
c = 66.918	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	RAYONIX MX-300		2021-04-15	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)	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	1.55	40	99.6	0.999	15.11	3.8		439646			24.7

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.55	1.59			0.718	1.49

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	17ZY	1.55	40	56148	3030	99.88	0.178	0.1773	0.1913	RANDOM	24.683

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]
0.11		0.21	0.16		-0.28

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.844
r_dihedral_angle_4_deg	14.645
r_dihedral_angle_3_deg	11.397
r_dihedral_angle_1_deg	5.797
r_angle_other_deg	1.252
r_angle_refined_deg	1.154
r_chiral_restr	0.054
r_gen_planes_refined	0.004
r_bond_refined_d	0.003
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	29.844
r_dihedral_angle_4_deg	14.645
r_dihedral_angle_3_deg	11.397
r_dihedral_angle_1_deg	5.797
r_angle_other_deg	1.252
r_angle_refined_deg	1.154
r_chiral_restr	0.054
r_gen_planes_refined	0.004
r_bond_refined_d	0.003
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2264
Nucleic Acid Atoms
Solvent Atoms	209
Heterogen Atoms	34

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

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.