Experiment: 9JDD

Crystal structure of the type VI secretion system effector-immunity complex BtaeB CTD-BtaiB from Bacteroides fragilis

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
in silico model	AlphaFold

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		291.15	0.05 M BIS-TRIS (PH=5,9), 0.05 M (NH4)2SO4, 28% Pentaerythritol ethoxylate (15/4 EO/OH)

Crystal Properties
Matthews coefficient	Solvent content
3.42	64.01

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 117.385	α = 90
b = 117.385	β = 90
c = 141.493	γ = 120

Symmetry
Space Group	P 65 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	PIXEL	DECTRIS EIGER X 16M		2023-03-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRF BEAMLINE BL02U1	0.97918	SSRF	BL02U1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	CC (Half)	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	1.9	30.56	97.53	1	22.4	6.1		44681			23.39

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.9	1.96			0.82

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1.9	30.56	1.36	44681	2000	97.57	0.1611	0.1597	0.1594	0.1906	0.1901	30.62

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	15.2652
f_angle_d	1.4317
f_chiral_restr	0.1035
f_bond_d	0.0186
f_plane_restr	0.0115

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2575
Nucleic Acid Atoms
Solvent Atoms	373
Heterogen Atoms	7

Software

Software
Software Name	Purpose
PHENIX	refinement
Coot	model building
HKL-3000	data reduction
HKL-3000	data scaling
HKL-3000	phasing