1LN8

Crystal Structure of a New Isoform of Phospholipase A2 from Naja naja sagittifera at 1.6 A Resolution

X-RAY DIFFRACTION

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Starting Model(s)

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

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	298	sodium phosphate, ethanol, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.18	43.23

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 42.099	α = 90
b = 42.099	β = 90
c = 64.549	γ = 90

Symmetry
Space Group	P 41

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	200	CCD	MARRESEARCH	Mirror	2001-09-14	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	EMBL/DESY, HAMBURG BEAMLINE X11	0.80200	EMBL/DESY, HAMBURG	X11

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	1.65	20	99	0.078	18.2	7.1	13470	12931	-3	-3	20.429

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)
	1.65	1.68	99.1		0.299	3		672

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	1LFF	1.65	20	13470	12931	539	100	0.1855	0.18558	0.18408	0.22193	RANDOM	20.147

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]
-0.25			-0.25		0.5

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_3_deg	13.869
r_scangle_it	3.548
r_dihedral_angle_1_deg	3.393
r_scbond_it	2.33
r_angle_refined_deg	1.491
r_mcangle_it	1.472
r_angle_other_deg	0.973
r_mcbond_it	0.744
r_nbd_refined	0.267
r_symmetry_vdw_other	0.242
r_symmetry_vdw_refined	0.234
r_symmetry_hbond_refined	0.218
r_nbd_other	0.199
r_xyhbond_nbd_refined	0.136
r_chiral_restr	0.088
r_bond_refined_d	0.008
r_gen_planes_refined	0.004
r_gen_planes_other	0.003
r_bond_other_d	0.001
r_nbtor_other
r_xyhbond_nbd_other
r_symmetry_hbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	910
Nucleic Acid Atoms
Solvent Atoms	148
Heterogen Atoms	6

Software

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