4IPJ

Crystal Structure of R314K N-acetyl Neuraminic Acid Synthase from Neiserria meningitidis with Malate bound

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.2	298.15	1.9 M malic acid, 10 mM magnesium chloride, pH 6.2, VAPOR DIFFUSION, HANGING DROP, temperature 298.15K

Crystal Properties
Matthews coefficient	Solvent content
2.23	44.93

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.23	α = 90
b = 76.05	β = 90
c = 77.67	γ = 90

Symmetry
Space Group	P 21 21 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 315r		2011-02-19	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	AUSTRALIAN SYNCHROTRON BEAMLINE MX2	0.95369	Australian Synchrotron	MX2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.15	34.15	100	0.137	0.137	15.9	13.5	19363	19363

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.15	2.27	100		0.405	0.405	7.3	13.7

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	PDB ENTRY 1XUZ	2.15	34.15	17394	1937	99.83	0.18075	0.17394	0.24229	RANDOM	13.706

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]
0.01			-0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.037
r_dihedral_angle_4_deg	20.555
r_dihedral_angle_3_deg	14.705
r_dihedral_angle_1_deg	5.69
r_scangle_it	3.61
r_scbond_it	2.17
r_angle_refined_deg	1.37
r_mcangle_it	1.222
r_angle_other_deg	0.888
r_mcbond_it	0.632
r_mcbond_other	0.144
r_chiral_restr	0.082
r_bond_refined_d	0.014
r_gen_planes_refined	0.005
r_bond_other_d	0.001
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_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2696
Nucleic Acid Atoms
Solvent Atoms	189
Heterogen Atoms	10

Software

Software
Software Name	Purpose
Blu-Ice	data collection
CCP4	model building
REFMAC	refinement
iMOSFLM	data reduction
SCALA	data scaling
CCP4	phasing