3QHQ | pdb_00003qhq

Structure of CRISPR-associated protein Csn2

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.8	277	0.1M Hepes, 12% PEG 6000, 0.05M Phenole, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.05	59.74

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 75.3	α = 90
b = 83.3	β = 109.4
c = 110.4	γ = 90

Symmetry
Space Group	C 1 2 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	173	CCD	MAR CCD 165 mm		2010-11-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE BM30A	0.979981	ESRF	BM30A

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	2	50	99.4	0.026	36.51	4.53		43206		2	33.334

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	2	2.05	97.9		0.179	7.39	4.2	3103

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (I)	Number Reflections (All)	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)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	SAD	THROUGHOUT	2	19.57	2	43206	41031	2174	99.42	0.2048	0.2036	0.2383	0.2277	0.2579	RANDOM	35.4208

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]
0.54		0.64	1.12		-1.24

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	38.101
r_dihedral_angle_3_deg	12.876
r_dihedral_angle_4_deg	7.786
r_dihedral_angle_1_deg	4.857
r_scangle_it	1.676
r_angle_refined_deg	1.026
r_scbond_it	0.994
r_mcangle_it	0.671
r_mcbond_it	0.361
r_chiral_restr	0.074
r_bond_refined_d	0.008
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3489
Nucleic Acid Atoms
Solvent Atoms	296
Heterogen Atoms	17

Software

Software
Software Name	Purpose
BEST	data collection
Auto-Rickshaw	phasing
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling