Experiment: 6NJY

Type IV CRISPR associated RNA endonuclease Cas6 - apo form

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	5	293	Mother Liquor = 0.1 M sodium acetate trihydrate (pH 5.0) and 1.75M ammonium sulfate. 6-8 mg/ml of protein purified in 100 mM HEPES pH 7.5, 150 mM KCl, 5% glycerol, 1mM TCEP, was mixed in equal volumes (2 microliters of each) on a sitting drop pedestal with ~500 mL of mother liquor in reservoir.

Crystal Properties
Matthews coefficient	Solvent content
2.66	53.81

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 85.541	α = 90
b = 85.541	β = 90
c = 142.587	γ = 120

Symmetry
Space Group	P 61

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	193	PIXEL	DECTRIS PILATUS 6M		2018-02-07	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL12-2	1.55, 1.0718	SSRL	BL12-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (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	1.76	40.004	99.6	0.053	0.058	0.023	18.1	6		58149			33.22

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.76	1.82	96.3		0.727	0.822	0.376	0.736		4.2

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	1.76	40.004	56932	1966	97.55	0.1682	0.1672	0.1698	0.1978	0.1995	50.4429

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]

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3721
Nucleic Acid Atoms
Solvent Atoms	155
Heterogen Atoms	191

Software

Software
Software Name	Purpose
HKL-2000	data scaling
SOLVE	phasing
RESOLVE	model building
PHENIX	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction