6HEB

Influenza A Virus N9 Neuraminidase complex with Oseltamivir (Tern).

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	7NN9

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.6	293	N9 crystals were grown by hanging drop vapour diffusion against a reservoir of 1.9M potassium phosphate, pH 6.8, starting with equal volumes of N9 NA(10-15mg/ml in water) and potassium phosphate buffer 1.4M KH2PO4:3M K2HPO4 in ratio 8:4, pH 6.6 at 20 degrees celsius. Inhibitor complexeswere obtained by soaking N9 crystals in a solution of 1.4M potassium phosphate buffer, pH 6.8, containing 5 mM of inhibitor for 3 hours at 18 degrees celsius. Glycerol cryo-buffer also soaked in.

Crystal Properties
Matthews coefficient	Solvent content
2.81	56.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 180.691	α = 90
b = 180.691	β = 90
c = 180.691	γ = 90

Symmetry
Space Group	I 4 3 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 315		2001-12-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.85	SSRL	BL11-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	Rrim I (All)	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	1.75	63.97	100	0.098	6.4	9.2		48047			14.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rrim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.75	1.84			0.183	15.5

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	7NN9	1.75	63.97	48047	2526	99.92	0.11981	0.11864	0.14171	RANDOM	14.385

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]

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.491
r_dihedral_angle_1_deg	20.747
r_dihedral_angle_4_deg	18.672
r_dihedral_angle_3_deg	12.767
r_long_range_B_refined	5.226
r_long_range_B_other	5.226
r_scangle_other	3.564
r_scbond_it	2.569
r_scbond_other	2.569
r_angle_refined_deg	1.794
r_mcangle_other	1.493
r_mcangle_it	1.492
r_angle_other_deg	1.092
r_mcbond_it	1.075
r_mcbond_other	1.066
r_chiral_restr	0.098
r_bond_refined_d	0.016
r_gen_planes_refined	0.011
r_gen_planes_other	0.002
r_bond_other_d	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3067
Nucleic Acid Atoms
Solvent Atoms	518
Heterogen Atoms	219

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
REFMAC	phasing