2W20

Structure of the catalytic domain of the native NanA sialidase from Streptococcus pneumoniae

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1				25% PEG4K, 0.1 M MES PH6.0

Crystal Properties
Matthews coefficient	Solvent content
2.2	49

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 47.2	α = 90
b = 96.6	β = 90
c = 218.2	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	CCD	ADSC CCD			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-2		ESRF	ID14-2

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	1.49	20	97	0.07	16	3.9		159417		2	14.85

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	OTHER	NONE	1.49	40.23	1.33	159301	8003	97.7	0.201	0.2	0.225

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]
2.8128			-1.0171		-1.7957

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	17.27
f_angle_d	1.22
f_chiral_restr	0.11
f_bond_d
f_plane_restr

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7429
Nucleic Acid Atoms
Solvent Atoms	1025
Heterogen Atoms	45

Software

Software
Software Name	Purpose
PHENIX	refinement