3QRQ

Structure of Thermus Thermophilus Cse3 bound to an RNA representing a pre-cleavage complex

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	vapour diffusion, hanging drop	7.5	298	15% PEG 3350, 100mM KOAc, 1mM spermidine, pH 7.5, vapour diffusion, hanging drop, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.32	46.95

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 61.5	α = 90
b = 68.91	β = 90
c = 158.063	γ = 90

Symmetry
Space Group	I 2 2 2

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	MARMOSAIC 325 mm CCD		2010-06-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.97945	SSRL	BL11-1

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	3.194	45.884	97.6	0.168	5.5	7.8	5874	5725	2	2

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	3.194	3.31	89.4		0.412		3.7	514

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	MOLECULAR REPLACEMENT	THROUGHOUT	3.194	45.884	5586	5724	272	97.41	0.2129	0.2101	0.2663	RANDOM	46.96

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]
-0.3			-2.18		2.48

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.704
r_dihedral_angle_3_deg	16.893
r_dihedral_angle_4_deg	16.597
r_dihedral_angle_1_deg	5.178
r_angle_refined_deg	1.008
r_scangle_it	0.937
r_mcangle_it	0.503
r_scbond_it	0.475
r_nbtor_refined	0.301
r_mcbond_it	0.278
r_nbd_refined	0.185
r_symmetry_vdw_refined	0.145
r_chiral_restr	0.127
r_symmetry_hbond_refined	0.122
r_xyhbond_nbd_refined	0.111
r_bond_refined_d	0.006
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1631
Nucleic Acid Atoms	404
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection