7EU9

Crystal structure of the selenomethionine(SeMet)-derived Cas12i1 R-loop complex before target DNA cleavage

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		289	0.1 M sodium citrate (pH 5.6), 17% (w/v) Polyethylene glycol 3350, 0.1 M sodium citrate

Crystal Properties
Matthews coefficient	Solvent content
2.82	53.41

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 127.064	α = 90
b = 141.577	β = 90
c = 208.517	γ = 90

Symmetry
Space Group	C 2 2 21

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 QUANTUM 315r		2019-12-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRF BEAMLINE BL17U1	0.9792	SSRF	BL17U1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.35	60	100	0.14	0.997	9.4	13.2		78375

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.35	2.48			0.969	0.83

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	SAD	THROUGHOUT	2.35	58.63	74089	3923	99.6	0.2297	0.2276	0.268	RANDOM	58.834

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]
1.42			0.19		-1.62

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.937
r_dihedral_angle_3_deg	19.803
r_dihedral_angle_4_deg	19.108
r_dihedral_angle_1_deg	6.746
r_angle_refined_deg	1.433
r_angle_other_deg	1.007
r_chiral_restr	0.071
r_bond_refined_d	0.009
r_gen_planes_refined	0.007
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.937
r_dihedral_angle_3_deg	19.803
r_dihedral_angle_4_deg	19.108
r_dihedral_angle_1_deg	6.746
r_angle_refined_deg	1.433
r_angle_other_deg	1.007
r_chiral_restr	0.071
r_bond_refined_d	0.009
r_gen_planes_refined	0.007
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	8720
Nucleic Acid Atoms	2037
Solvent Atoms	79
Heterogen Atoms	13

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
xia2	data reduction
SCALA	data scaling
PHENIX	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 R01GM133198.