6T1A

Structure of mosquitocidal Cyt1Aa protoxin obtained by Serial Femtosecond Crystallography on in vivo grown crystals at pH 10

X-RAY DIFFRACTION

Serial Crystallography (SX)

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	6T14

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	IN CELL	10.3	300	In cell crystallization by recombinant expression in a Bacillus thuringiensis serovar israelensis strain devoid of its pBt plasmid.

Crystal Properties
Matthews coefficient	Solvent content
1.91	35.62

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 65.446	α = 90
b = 65.446	β = 90
c = 165.451	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	300	PIXEL	CS-PAD CXI-2		2018-11-16	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	FREE ELECTRON LASER	SLAC LCLS BEAMLINE CXI	1.28	SLAC LCLS	CXI

Serial Crystallography

Sample delivery method
Diffraction ID	Description	Sample Delivery Method
1		injection

Measurement
Diffraction ID	Pulse Duration	Pulse Repetition Rate	Focal Spot Size	Pulse Energy	Photons Per Pulse
1	40 (fs)	120	1.7	undefined (KeV)

Data Reduction
Diffraction ID	Frames Indexed	Crystal Hits	Frames Indexed	Latices Merged
1	19924		19924

Injection
Diffraction ID	Description	Flow Rate	Injector Diameter	Injection Power	Injector Nozzle	Filter Size	Carrier Solvent
1	MESH	undefined (µl/min)	undefined (µm)

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	CC (Half)	R Split (All)	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	1.85	50	99.9	0.998	0.07	34.6	165.4		18439

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	R Split (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.85	1.88	100		0.073	0.495		33.6

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 (All)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	6t14	1.85	26.824	18437	924	98.404	0.245	0.2426	0.24	0.2937	0.29	34.123

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]
-0.001	-0.001		-0.001		0.004

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.236
r_dihedral_angle_3_deg	14.345
r_dihedral_angle_4_deg	7.819
r_dihedral_angle_1_deg	5.375
r_lrange_it	4.24
r_mcangle_it	0.892
r_angle_refined_deg	0.787
r_scangle_it	0.547
r_mcbond_it	0.48
r_nbtor_refined	0.297

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1872
Nucleic Acid Atoms
Solvent Atoms	279
Heterogen Atoms	1

Software

Software
Software Name	Purpose
REFMAC	refinement
DIALS	data reduction
DIALS	data scaling
PHASER	phasing

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.