3BVO

Crystal structure of human co-chaperone protein HscB

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		293	Protein solution (10 mg/mL Se-Met protein, 0.050 M Sodium chloride, 0.0031 M Sodium azide, 0.0003 M TCEP, 0.005 M Bis-Tris pH 7.0) mixed in a 1:1 ratio with the Well solution (16% PEG 3350, 0.050 M Lithium sulfate, 0.10 M PIPES pH 6.5), cryoprotected with 20% PEG 3350, 0.050 M Lithium sulfate, 0.10 M PIPES pH 6.5 in four steps up to 20% Ethylene glycol, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.34	47.54

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.644	α = 90
b = 32.581	β = 105.24
c = 114.362	γ = 90

Symmetry
Space Group	P 1 21 1

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	MARMOSAIC 300 mm CCD	Adjustable focusing mirrors in K-B geometry	2007-12-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 23-ID-D	0.97934	APS	23-ID-D

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	3	47.75	96.7	0.086	10.054	6.3		9770

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	3	3.11	79.8		0.342	3.022	4.3	780

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	SAD	THROUGHOUT	3	47.75	9242	753	97.489	0.24	0.236	0.288	RANDOM	72.562

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]
0.085		-0.703	4.31		-4.765

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	35.164
r_dihedral_angle_4_deg	19.232
r_dihedral_angle_3_deg	17.365
r_scangle_it	5.666
r_dihedral_angle_1_deg	5.06
r_scbond_it	3.778
r_mcangle_it	1.686
r_angle_refined_deg	1.047
r_mcbond_it	0.819
r_nbtor_refined	0.307
r_symmetry_vdw_refined	0.265
r_nbd_refined	0.221
r_xyhbond_nbd_refined	0.132
r_symmetry_hbond_refined	0.116
r_chiral_restr	0.072
r_bond_refined_d	0.008
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3096
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	7

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing
DM	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345	data collection
HKL-2000	data reduction
SHELXD	phasing