7AF2

Salmonella typhimurium neuraminidase mutant (D62G)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3SIL

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		277	Crystals grown by hanging drop vapour diffusion. A 1:1 mixture of protein solution and an 8:4 mixture of K2HPO4 to KH2PO4 was placed above a well of an 8:6 solution of K2HPO4 to KH2PO4. Then serially cryoprotected in situ to 40% glycerol (v/v with mother liquor) in 10% increments over a period of a few minutes.

Crystal Properties
Matthews coefficient	Solvent content
2.08	40.92

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.914	α = 90
b = 81.357	β = 90
c = 91.053	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	IMAGE PLATE	MAR scanner 345 mm plate		1998-02-27	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.79	SSRL	BL9-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym I (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	0.792	18.107	94.7	0.053	0.061	23.61	3.2		355798

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Rrim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	0.792	0.81	70.1		1.161	1.572	0.88	1.8

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-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	3SIL	0.792	18.102	349368	17531	92.919	0.121	0.1206	0.1319	15.115

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]
0.408			-0.283		-0.125

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.892
r_rigid_bond_restr	15.11
r_dihedral_angle_3_deg	12.77
r_dihedral_angle_4_deg	12.503
r_dihedral_angle_1_deg	7.931
r_scbond_it	7.005
r_scbond_other	7.003
r_lrange_other	6.782
r_lrange_it	6.76
r_scangle_it	5.994
r_scangle_other	5.993
r_mcangle_it	5.883
r_mcangle_other	5.882
r_mcbond_other	4.911
r_mcbond_it	4.909
r_angle_other_deg	2.52
r_angle_refined_deg	2.468
r_nbd_refined	0.291
r_symmetry_xyhbond_nbd_refined	0.259
r_symmetry_nbd_other	0.232
r_xyhbond_nbd_refined	0.222
r_xyhbond_nbd_other	0.21
r_symmetry_nbd_refined	0.198
r_nbd_other	0.189
r_nbtor_refined	0.174
r_chiral_restr	0.144
r_symmetry_nbtor_other	0.089
r_bond_other_d	0.035
r_bond_refined_d	0.022
r_gen_planes_other	0.02
r_gen_planes_refined	0.014

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2936
Nucleic Acid Atoms
Solvent Atoms	502
Heterogen Atoms	35

Software

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