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CRYSTAL STRUCTURE OF THE RESPONSE REGULATOR DIVK AT PH 8.0 IN COMPLEX WITH MN2+

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING OR SITTING-DROP	8	285	MES 50mM PH6.0, PEG MME 550 32% AT 285K, The Protein was Concentrated At 2 MG/ML In MES-NAOH PH 6.00 (20 mM), DTT (5 mM) And Mixed With An Equal Volume Of The Reservoir Solution Containing PEG MME 550 (32%), MES PH 6.00 (40 mM), DTT (5 mM). Crystal Size (300X40X40 microM3) In 20microL Sitting Drops. Crystals Transferred In Reservoir Solutions Whose Ph Was Increased From 6.0 To 8.0 By Steps Of 0.5 Ph Units (The Soaking Time In Each Solution Was 12 Hours). Manganese Derivative Was Obtained By Soaking For 24 Hours Protein Crystals In The Reservoir Solution Supplemented With 10 Mm MnCl2 (PH 8.00). Crystals Were Frozen In Liquid Propane After Soaking For A Few Seconds In Peg MME 550 (50%), Tris PH 8.0 (40 Mm)., VAPOR DIFFUSION, HANGING OR SITTING-DROP

Crystal Properties
Matthews coefficient	Solvent content
1.8	31

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 36.12	α = 90
b = 40.76	β = 90
c = 66.02	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		2000-04-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM30A	0.980	ESRF	BM30A

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	27	98.2	0.051	8.4	3		6829			18.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2	2.11	98.2		0.261	2.7	3.1	2970

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	FOURIER SYNTHESIS	THROUGHOUT	APO-DIVK SOLVED AT PH6	2	14.95	6829	6829	649	84.3	0.208	0.246	RANDOM	32.8

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]
2.74			1		-3.74

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.1
c_scangle_it	2.03
c_mcangle_it	1.81
c_scbond_it	1.33
c_angle_deg	1.2
c_mcbond_it	1.1
c_improper_angle_d	0.64
c_bond_d	0.005
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	827
Nucleic Acid Atoms
Solvent Atoms	37
Heterogen Atoms	2

Software

Software
Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
CNS	refinement
CCP4	data scaling
CNS	phasing