7YOM

Crystal structure of tetra mutant (D67E,A68P,L98I,A301S) of O-acetylserine sulfhydrylase from Salmonella typhimurium in complex with high-affinity inhibitory peptide from serine acetyltransferase of Salmonella typhimurium at 2.8 A

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	278	0.1M HEPES, 1.3M Sodium citrate

Crystal Properties
Matthews coefficient	Solvent content
2.12	42.03

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 113.14	α = 90
b = 113.14	β = 90
c = 43.74	γ = 90

Symmetry
Space Group	I 41

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MAR scanner 345 mm plate		2012-05-08	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU	1.54179

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.8	40.831	97.66	0.6911	0.713	42.47	10.1		69653			24.22

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	2.8	2.9	100		0.634

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 (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1Y7L	2.8	40.831	6837	349	97.657	0.218	0.2156	0.2723	22.582

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]
-0.508			-0.508		1.016

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.054
r_dihedral_angle_3_deg	17.92
r_dihedral_angle_4_deg	14.42
r_dihedral_angle_1_deg	6.612
r_lrange_it	6.061
r_scangle_it	3.422
r_mcangle_it	2.691
r_scbond_it	2.363
r_mcbond_it	1.659
r_angle_refined_deg	1.515

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.054
r_dihedral_angle_3_deg	17.92
r_dihedral_angle_4_deg	14.42
r_dihedral_angle_1_deg	6.612
r_lrange_it	6.061
r_scangle_it	3.422
r_mcangle_it	2.691
r_scbond_it	2.363
r_mcbond_it	1.659
r_angle_refined_deg	1.515
r_nbtor_refined	0.3
r_symmetry_nbd_refined	0.244
r_symmetry_xyhbond_nbd_refined	0.239
r_nbd_refined	0.216
r_xyhbond_nbd_refined	0.112
r_chiral_restr	0.108
r_bond_refined_d	0.007
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2303
Nucleic Acid Atoms
Solvent Atoms	7
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALA	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 R01GM157729.