Experiment: 9QGV

SciA(H42Q) endonuclease from Escherichia phage T5 in complex with 10 bp DNA (GCGC sequence 2)

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, SITTING DROP	7	290	0.2 M sodium acetate trihydrate and 20% (w/v) PEG 3350 (PEGIon screen condition G2, Hampton Research)

Crystal Properties
Matthews coefficient	Solvent content
2.04	39.61

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 33.29	α = 90
b = 71.69	β = 97.17
c = 40.23	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	80	PIXEL	DECTRIS EIGER2 X CdTe 9M		2024-05-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I24	0.9537	Diamond	I24

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	1.55	35.85	100	0.105	0.996	7.9	6.6		27207			20.6

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	1.55	1.58	100		0.274	0.914

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	1.55	35.84	1.34	27151	1378	99.78	0.2057	0.2041	0.2053	0.2361	0.2364	36.81

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	26.3147
f_angle_d	1.2514
f_chiral_restr	0.0548
f_bond_d	0.0107
f_plane_restr	0.0096

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	977
Nucleic Acid Atoms	404
Solvent Atoms	116
Heterogen Atoms	7

Software

Software
Software Name	Purpose
PHENIX	refinement
PHENIX	refinement
xia2	data reduction
Aimless	data scaling
PHASER	phasing