Experiment: 6RA4

Human ARGONAUTE-2 PAZ DOMAIN (214-347) IN COMPLEX WITH CGUGACUCU

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.6	292	Drop was a 1:1 mix of protein stock (9.4MG/ML HAGO2 PAZ [214 TO 347] IN 100MM POTASSIUM CHLORIDE, 10MM DTT, 5MM HEPES/KOH PH 7.6, WITH A 1.1-FOLD EXCESS OF OLIGONUCLEOTIDE ADDED FROM A 1.75MM STOCK SOLUTION IN 100MM POTASSIUM CHLORIDE, 10MM DTT, 5MM HEPES) and reservoir solution (0.2M sodium CHLORIDE 20% PEG 3,350)

Crystal Properties
Matthews coefficient	Solvent content
2.43	49.34

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.617	α = 90
b = 87.672	β = 90
c = 56.832	γ = 90

Symmetry
Space Group	P 21 21 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	MARRESEARCH		2009-07-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA	0.99990	SLS	X10SA

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	1.9	100	99.1	0.042	48	7.3		29356			31.4

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	1.9	1.97	99		0.504	3.29	7.2

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-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	1.9	28.89	29003	1425	99	0.239	0.2384	0.268	0.2668	RANDOM	45.1

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]
-6.67			3.05		3.62

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	21.2
c_scangle_it	3.39
c_mcangle_it	2.6
c_scbond_it	2.21
c_mcbond_it	1.65
c_angle_deg	1.3
c_improper_angle_d	1.24
c_bond_d	0.011

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2102
Nucleic Acid Atoms	370
Solvent Atoms	108
Heterogen Atoms	12

Software

Software
Software Name	Purpose
HKL-2000	data reduction
SCALEPACK	data scaling
PHASER	phasing
CNS	refinement
PDB_EXTRACT	data extraction