2PC6

Crystal structure of putative acetolactate synthase- small subunit from Nitrosomonas europaea

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	293	2% TACSIMATE, 10% PEG 400, 0.1M KCl, 10mM CaCl2, 50 mM Na-HEPES, pH 7.0, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.84	56.69

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 122.123	α = 90
b = 122.123	β = 90
c = 111.559	γ = 90

Symmetry
Space Group	P 42 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 315	SI 111 CHANNEL	2005-10-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID	0.97950	APS	19-ID

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	2.5	35.58	99.9	0.084	0.084	60.72	18.9	28271	28271		-3	44.2

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	2.5	2.57	100		0.431	0.431	7.35	19.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	2.5	35.58	28270	28270	1465	99.85	0.20846	0.20846	0.20503	0.27573	RANDOM	47.511

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]
1.08			1.08		-2.16

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.874
r_dihedral_angle_4_deg	21.305
r_dihedral_angle_3_deg	19.982
r_dihedral_angle_1_deg	8.055
r_scangle_it	4.538
r_scbond_it	3.07
r_angle_refined_deg	1.838
r_mcbond_it	1.532
r_mcangle_it	1.381
r_nbtor_refined	0.31
r_nbd_refined	0.239
r_symmetry_hbond_refined	0.229
r_symmetry_vdw_refined	0.202
r_xyhbond_nbd_refined	0.175
r_chiral_restr	0.115
r_metal_ion_refined	0.025
r_bond_refined_d	0.019
r_gen_planes_refined	0.006
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4858
Nucleic Acid Atoms
Solvent Atoms	200
Heterogen Atoms	27

Software

Software
Software Name	Purpose
HKL-2000	data scaling
SHELXD	phasing
SHELXE	model building
MLPHARE	phasing
DM	model building
SOLVE	phasing
O	model building
Coot	model building
CCP4	model building
REFMAC	refinement
HKL-2000	data collection
HKL-2000	data reduction
HKL-3000	phasing
DM	phasing
RESOLVE	phasing
CCP4	phasing
ARP/wARP	model building