1TTW

Crystal structure of the Yersinia Pestis type III secretion chaperone SycH in complex with a stable fragment of YscM2

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	9.6	298	1.8 M ammonium sulphate, 200 mM magnesium acetate, 100 mM CAPSO, 2% dioxane, 1.6 mM CHAPS, pH 9.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.2	45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 63.664	α = 90
b = 63.664	β = 90
c = 162.263	γ = 120

Symmetry
Space Group	P 61 2 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	MARRESEARCH		2003-11-22	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	0.98397	APS	22-ID

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	2.38	25	85	0.069	26.9	13	9196	7916	2	2	66.026

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	2.38	2.48	67.5		0.45	4	10	888

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Cut-off Sigma (F)	Number Reflections (All)	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	MIR	THROUGHOUT	2.38	25	2	2	9196	7916	388	98.83	0.24541	0.24312	0.29219	RANDOM	67.69

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]
0.61	0.3		0.61		-0.91

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_1_deg	11.704
r_scangle_it	7.128
r_scbond_it	4.59
r_angle_refined_deg	3.518
r_mcangle_it	3.376
r_mcbond_it	1.897
r_angle_other_deg	1.484
r_symmetry_hbond_refined	0.514
r_nbd_refined	0.285
r_symmetry_vdw_other	0.284
r_nbd_other	0.278
r_xyhbond_nbd_refined	0.276
r_symmetry_vdw_refined	0.259
r_chiral_restr	0.193
r_nbtor_other	0.128
r_bond_refined_d	0.044
r_gen_planes_refined	0.016
r_gen_planes_other	0.012
r_bond_other_d	0.003
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_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	993
Nucleic Acid Atoms
Solvent Atoms	41
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
MAR345	data collection
SCALEPACK	data scaling
SOLVE	phasing