1TGM

Crystal structure of a complex formed between group II phospholipase A2 and aspirin at 1.86 A resolution

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	6	293	Polyethylene glycol, ammonium sulphate, pH 6.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.5	49.6

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 53.314	α = 90
b = 53.314	β = 90
c = 48.453	γ = 90

Symmetry
Space Group	P 43

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	298	IMAGE PLATE	MARRESEARCH	monochromator	2004-05-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

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	1.86	20	98.5	0.092	6.5			11524

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)
	1.86	1.89	97.9		0.32	2.5

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1Q7A	1.86	20	10807	545	98.51	0.1986	0.1986	0.19733	0.22403	RANDOM	23.501

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]
0.22			0.22		-0.44

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	20.163
r_dihedral_angle_1_deg	2.925
r_scangle_it	2.607
r_scbond_it	1.576
r_angle_refined_deg	1.524
r_mcangle_it	1.142
r_angle_other_deg	0.737
r_mcbond_it	0.59
r_nbd_refined	0.457
r_symmetry_vdw_other	0.259
r_nbd_other	0.219
r_symmetry_hbond_refined	0.198
r_xyhbond_nbd_refined	0.197
r_symmetry_vdw_refined	0.136
r_xyhbond_nbd_other	0.114
r_chiral_restr	0.076
r_bond_refined_d	0.008
r_gen_planes_refined	0.004
r_gen_planes_other	0.002
r_bond_other_d	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	940
Nucleic Acid Atoms
Solvent Atoms	139
Heterogen Atoms	19

Software

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