1OQ7

The crystal structure of the iron free (Apo-)form of Stearoyl Acyl Carrier Protein Desaturase from Ricinus Communis (Castor Bean).

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.7	277	8-10% Peg6000, 60mM Strontium Chloride, 0.1M ADA buffer, 15% Glycerol, pH 6.7, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.55	65.08

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 188.033	α = 90
b = 188.033	β = 90
c = 82.047	γ = 120

Symmetry
Space Group	P 31

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	CCD	CUSTOM-MADE		2001-10-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.1	NSLS	X25

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	3.2	20	92.4	0.065	12.2		53272	49227	-3	-3

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	3.2	3.31	65.1		0.196

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1AFR	3.2	19.96	53272	47756	1471	92.51	0.22935	0.22935	0.2285	0.25709	RANDOM	37.951

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]
3.75	1.88		3.75		-5.63

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.174
r_scangle_it	2.844
r_scbond_it	1.602
r_angle_refined_deg	1.516
r_mcangle_it	0.83
r_mcbond_it	0.372
r_symmetry_vdw_refined	0.262
r_nbd_refined	0.245
r_xyhbond_nbd_refined	0.195
r_symmetry_hbond_refined	0.149

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	6.174
r_scangle_it	2.844
r_scbond_it	1.602
r_angle_refined_deg	1.516
r_mcangle_it	0.83
r_mcbond_it	0.372
r_symmetry_vdw_refined	0.262
r_nbd_refined	0.245
r_xyhbond_nbd_refined	0.195
r_symmetry_hbond_refined	0.149
r_chiral_restr	0.097
r_bond_refined_d	0.016
r_gen_planes_refined	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	16836
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	12

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	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.