Experiment: 2Y8Y

Structure B of CRISPR endoribonuclease Cse3 bound to 19 nt RNA

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2Y8W	PDB ENTRY 2Y8W

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		5		0.1 M SODIUM ACETATE, PH 5.0 4% PEG (W/V) 6000.

Crystal Properties
Matthews coefficient	Solvent content
2.1	41

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 44.28	α = 90
b = 71.21	β = 90
c = 76.56	γ = 90

Symmetry
Space Group	P 21 21 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 CCD		2010-10-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1		ALS	8.3.1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	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	1.44	29	100	0.05	22.56	8.9		44574		2	23.6

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.44	1.48	100		0.85	2.29	7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	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	PDB ENTRY 2Y8W	1.44	33.752	2	44574	1844	99.99	0.1854	0.1845	0.1808	0.2054	0.197	30.4

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]
0.4515			2.267		-2.7185

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.923
f_angle_d	1.043
f_chiral_restr	0.069
f_bond_d	0.006
f_plane_restr	0.005

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1593
Nucleic Acid Atoms	401
Solvent Atoms	351
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing