9IAB | pdb_00009iab

Structure of the Argonaute-associated Cas4 family protein 1 (ACE1) from Chroococcidiopsis thermalis (CtACE1)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP		293	Protein solution: -7.5 mg/ml CtACE1 -10 mM HEPES-KOH pH7.5 -250 mM KCl -1 mM DTT Reservoir solution: -0.1 M MES pH 6-7 -0.2 M (NH4)2SO4 -20-25% PEG MME 5K

Crystal Properties
Matthews coefficient	Solvent content
2.24	45.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 44.91	α = 100.17
b = 44.95	β = 92.22
c = 74.06	γ = 105.87

Symmetry
Space Group	P 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS PILATUS 2M-F		2017-05-21	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06DA	1.00003	SLS	X06DA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	Rrim I (All)	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	1.57	43.02	99.29	0.034	0.999	31.65	7		144407

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.57	1.63	94.57		0.559	0.918		7.1

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	SAD	FREE R-VALUE	1.57	43.02	1.37	144407	3917	94.6	0.1863	0.1859	0.1831	0.1992	0.1964	36.4

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]

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	13.4833
f_angle_d	1.1075
f_chiral_restr	0.0579
f_plane_restr	0.0149
f_bond_d	0.0082

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4288
Nucleic Acid Atoms
Solvent Atoms	395
Heterogen Atoms	89

Software

Software
Software Name	Purpose
XDS	data reduction
XDS	data scaling
PHENIX	refinement
PHASER	phasing
Coot	model building

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.