3JZ3

Structure of the cytoplasmic segment of histidine kinase QseC

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	288	8-10 mg/ml protein with 27-30% (NH4)2SO4, 0.1 M HEPES, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 288K

Crystal Properties
Matthews coefficient	Solvent content
2.23	44.91

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 70.737	α = 90
b = 70.737	β = 90
c = 176.573	γ = 90

Symmetry
Space Group	P 41 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	77	CCD	ADSC QUANTUM 315r		2008-08-28	M	MAD
2	1		CCD	ADSC QUANTUM 315r		2008-08-28

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.2.1	0.96789	ALS	8.2.1
2	SYNCHROTRON	ALS BEAMLINE 8.2.1	0.9794	ALS	8.2.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	50	99.9			16338	16317	1	1

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	2.5	2.59	100		0.294	10.4	13.8	1565

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	MAD	THROUGHOUT	2.5	34.69	14136	764	99.9	0.22996	0.22826	0.26234	RANDOM	44.119

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]

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.781
r_dihedral_angle_4_deg	16.088
r_dihedral_angle_3_deg	14.365
r_dihedral_angle_1_deg	4.643
r_scangle_it	4.376
r_mcangle_it	3.853
r_scbond_it	2.803
r_mcbond_it	2.335
r_angle_refined_deg	0.909
r_nbtor_refined	0.295
r_nbd_refined	0.187
r_symmetry_vdw_refined	0.149
r_xyhbond_nbd_refined	0.126
r_symmetry_hbond_refined	0.112
r_chiral_restr	0.056
r_bond_refined_d	0.006
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2308
Nucleic Acid Atoms
Solvent Atoms	44
Heterogen Atoms	5

Software

Software
Software Name	Purpose
HKL-2000	data collection
SOLVE	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling