3TBH

Crystal structure of O-Acetyl Serine Sulfhydrylase in complex with octapeptide derived from Serine Acetyl Transferase of Leishmania donovani

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3SPX	PDB ENTRY 3SPX

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	289	KSCN, PEG 3350, pH 6.5, vapor diffusion, hanging drop, temperature 289K

Crystal Properties
Matthews coefficient	Solvent content
2.13	42.31

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 115.217	α = 90
b = 62.44	β = 90
c = 43.538	γ = 90

Symmetry
Space Group	P 21 21 2

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	MARRESEARCH		2010-10-29	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM14	0.976	ESRF	BM14

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.68	115.22	99.59				36632	7.2

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 3SPX	1.68	115.22	36490	1798	99.59	0.1864	0.1847	0.2202	RANDOM	21.7077

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]
-1.11			0.26		0.84

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.725
r_dihedral_angle_4_deg	18.3
r_dihedral_angle_3_deg	13.324
r_dihedral_angle_1_deg	6.731
r_scangle_it	6.159
r_scbond_it	3.979
r_mcangle_it	2.539
r_angle_refined_deg	2.478
r_mcbond_it	1.589
r_chiral_restr	0.183

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.725
r_dihedral_angle_4_deg	18.3
r_dihedral_angle_3_deg	13.324
r_dihedral_angle_1_deg	6.731
r_scangle_it	6.159
r_scbond_it	3.979
r_mcangle_it	2.539
r_angle_refined_deg	2.478
r_mcbond_it	1.589
r_chiral_restr	0.183
r_bond_refined_d	0.031
r_gen_planes_refined	0.013

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2403
Nucleic Acid Atoms
Solvent Atoms	213
Heterogen Atoms	1

Software

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

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.