1W99

Mosquito-larvicidal toxin Cry4Ba from Bacillus thuringiensis ssp. Israelensis

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1DLC	PDB ENTRY 1DLC, PDB ENTRY 1CIY
experimental model	PDB	1CIY	PDB ENTRY 1DLC, PDB ENTRY 1CIY

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	293	VAPOUR DIFFUSION AT 20C IN HANGING DROPS CONTAINING 1:1 MIXTURE OF PROTEIN AT 8 MG/ML IN 50 MM SODIUM CARBONATE PH 10.5, 0.1 M SODIUM BROMIDE, 1 MM DTT AND PROTEASE INHIBITORS, AND THE RESERVOIR BUFFER CONSISTING OF 100MM TRIS ACETATE PH7-8 AND 0.4-0.6 M SODIUM BROMIDE.

Crystal Properties
Matthews coefficient	Solvent content
4.8	74

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 185.8	α = 90
b = 185.8	β = 90
c = 187.9	γ = 120

Symmetry
Space Group	H 3 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	ADSC CCD		2001-06-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SRS BEAMLINE PX14.2		SRS	PX14.2

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	1.75	73.97	99.6	0.066	24.1	9.7		1207111			24.4

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	1.75	1.81	100		0.353	15.1	8.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MIRAS	THROUGHOUT	PDB ENTRY 1DLC, PDB ENTRY 1CIY	1.75	73.97	124587	6217	100	0.205	0.205	0.218	RANDOM	27.2

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]
-1.932	-1.764		-1.932		3.865

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.9
c_scangle_it	2.77
c_scbond_it	2
c_mcangle_it	1.83
c_mcbond_it	1.22
c_angle_deg	1.2
c_improper_angle_d	0.71
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	4460
Nucleic Acid Atoms
Solvent Atoms	601
Heterogen Atoms	33

Software

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