3QH0

X-ray crystal structure of palmitic acid bound to the cyclooxygenase channel of cyclooxygenase-2

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1CVU	PDB ENTRY 1CVU

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	296	23-34% Polyacrylic acid 5100, 100mM HEPES pH 7.5, 20mM MgCl2, VAPOR DIFFUSION, SITTING DROP, temperature 296K

Crystal Properties
Matthews coefficient	Solvent content
2.57	52.11

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 121.906	α = 90
b = 130.888	β = 90
c = 179.968	γ = 90

Symmetry
Space Group	I 2 2 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	ADSC QUANTUM 210		2009-11-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	CHESS BEAMLINE A1	0.9769	CHESS	A1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	2.1	20	98	0.096	13.5	5.6	82053	77928			24.9

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.21	96.8		0.562	2.9	5.4	11717

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	PDB ENTRY 1CVU	2.1	20	82053	77928	4122	97.9	0.211	0.16145	0.15947	0.19894	RANDOM	28.188

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]
			-0.05		0.05

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.361
r_dihedral_angle_4_deg	14.88
r_dihedral_angle_3_deg	13.632
r_dihedral_angle_1_deg	5.692
r_scangle_it	3.063
r_scbond_it	1.841
r_angle_refined_deg	1.329
r_mcangle_it	0.97
r_mcbond_it	0.502
r_chiral_restr	0.093

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.361
r_dihedral_angle_4_deg	14.88
r_dihedral_angle_3_deg	13.632
r_dihedral_angle_1_deg	5.692
r_scangle_it	3.063
r_scbond_it	1.841
r_angle_refined_deg	1.329
r_mcangle_it	0.97
r_mcbond_it	0.502
r_chiral_restr	0.093
r_bond_refined_d	0.011
r_gen_planes_refined	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8833
Nucleic Acid Atoms
Solvent Atoms	753
Heterogen Atoms	377

Software

Software
Software Name	Purpose
Adxv	data processing
PHASER	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

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.