Experiment: 2DSV

Interactions of protective signalling factor with chitin-like polysaccharide: Crystal structure of the complex between signalling protein from sheep (SPS-40) and a hexasaccharide at 2.5A resolution

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2DPE

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.8	298	25MM TRIS-HCL, 50MM NACL, 19% ETHANOL, pH 7.8, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.74	55.17

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 62.77	α = 90
b = 66.31	β = 90
c = 107.122	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	298	IMAGE PLATE	MARRESEARCH	MIRROR	2005-07-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU300	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	2.54	56	97.2	0.12	7.6			14762			23.1

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.54	2.58	94.7		0.51	2.3

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-Factor (All)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	2DPE	2.54	56	14762	14448	314	94.8	0.188	0.187	0.187	0.1982	0.227	0.2316	RANDOM	32

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]
0.46			1.3		-1.76

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	25.2
c_scangle_it	4.87
c_mcangle_it	3.61
c_scbond_it	3.3
c_mcbond_it	2.2
c_angle_deg	1.7
c_improper_angle_d	1.03
c_bond_d	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2869
Nucleic Acid Atoms
Solvent Atoms	139
Heterogen Atoms	135

Software

Software
Software Name	Purpose
CNS	refinement
AUTOMAR	data reduction
SCALEPACK	data scaling
AMoRE	phasing