4W8J

Structure of the full-length insecticidal protein Cry1Ac reveals intriguing details of toxin packaging into in vivo formed crystals

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.84	292	600 nL of 13 mg/mL protein in 20 mM ethanolamine buffer with 0.35 M NaCl was mixed with 600 nL of 700 mM sodium-potassium tartrate, 100 mM BIS-TRIS propane pH 7.84 and 120 nL of 9 mM n-decyl thiomaltoside, and the resulting 1.2 uL sitting drop was allowed to equili- brate against 80uL of the tartrate/BIS-TRIS propane reservoir solution at 19C.

Crystal Properties
Matthews coefficient	Solvent content
1.89	35.09

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.314	α = 90
b = 87.314	β = 90
c = 266.396	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		CCD	MARMOSAIC 300 mm CCD		2011-08-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 22-ID	1.00	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	2.78	87	99.6	0.096	13.8	4.6		26818

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	2.78	2.9	100		0.62	2.1	4.6

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	MOLECULAR REPLACEMENT	THROUGHOUT	in house	2.78	82.97	25202	1340	98.83	0.23173	0.22645	0.33226	RANDOM	53.344

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]
0.48			0.48		-0.96

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.591
r_dihedral_angle_3_deg	20.05
r_dihedral_angle_4_deg	17.534
r_dihedral_angle_1_deg	6.986
r_scangle_it	2.804
r_scbond_it	1.578
r_angle_refined_deg	1.399
r_mcangle_it	1.147
r_mcbond_it	0.595
r_chiral_restr	0.095
r_bond_refined_d	0.012
r_gen_planes_refined	0.006
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8152
Nucleic Acid Atoms
Solvent Atoms	50
Heterogen Atoms	4

Software

Software
Software Name	Purpose
REFMAC	refinement