2XWI

SiaP R147K mutant in complex with Neu5Ac

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2V4C	PDB ENTRY 2V4C

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7	277	35 MG/ML SIAP (IN 20 MM HEPES, 10 MM NACL, 10 MM NEU5AC, PH 8.0) AND EQUAL VOLUME OF RESERVOIR SOLUTION (100MM MES PH 6.0 28.5% PEG 6K, 10MM SPERMINE TETRAHYDROCHLORIDE); TEMPERATURE 277K

Crystal Properties
Matthews coefficient	Solvent content
2.29	46.3

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 48.5	α = 90
b = 74.52	β = 90
c = 86.129	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		2009-10-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID23-2		ESRF	ID23-2

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	2.2	43.2	99.9	0.22	10.2	10.1		16495		2.6	26.8

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.2	2.32	99.9		2.6	10.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation 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	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 2V4C	2.195	43.065	2.5	15611	848	99.48	0.1975	0.1975	0.2623	RANDOM	32.94

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]
0.51			-2.64		2.14

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.678
r_dihedral_angle_4_deg	19.816
r_dihedral_angle_3_deg	15.321
r_dihedral_angle_1_deg	5.749
r_scangle_it	2.106
r_scbond_it	1.311
r_angle_refined_deg	1.146
r_mcangle_it	0.902
r_angle_other_deg	0.847
r_mcbond_it	0.492
r_mcbond_other	0.095
r_chiral_restr	0.078
r_bond_refined_d	0.018
r_bond_other_d	0.007
r_gen_planes_refined	0.005
r_gen_planes_other	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_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2426
Nucleic Acid Atoms
Solvent Atoms	209
Heterogen Atoms	21

Software

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