4GV3

Structures of Lassa and Tacaribe viral nucleoproteins with or without 5 triphosphate dsRNA substrate reveal a unique 3 -5 exoribonuclease mechanism to suppress type I interferon production

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	4.5	293	18.5% PEGMME 5000, 0.1M sodium citrate pH4.5 and 2.4% PEGMME350, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.1	41.48

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 46.58	α = 90
b = 46.58	β = 90
c = 208.82	γ = 90

Symmetry
Space Group	P 41 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	173	CCD	ADSC QUANTUM 315r		2011-06-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I02	0.976	Diamond	I02

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	1.68	52.24	100	0.068	0.065	9.1	3.2		25994	2	3	32

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.68	1.77	96.1		0.449	0.449	2.6	3.4

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-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION		THROUGHOUT	1.68	52.21	25994	1374	100	0.2	0.199	0.224	RANDOM	17.14

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]
-1.69			-1.69		3.38

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.813
r_sphericity_free	21.219
r_dihedral_angle_4_deg	15.868
r_dihedral_angle_3_deg	12.784
r_dihedral_angle_1_deg	5.133
r_sphericity_bonded	4.351
r_rigid_bond_restr	1.108
r_angle_refined_deg	1.016
r_angle_other_deg	0.757
r_chiral_restr	0.059
r_bond_refined_d	0.004
r_gen_planes_refined	0.003
r_bond_other_d	0.001
r_gen_planes_other	0.001
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_it
r_mcbond_other
r_mcangle_it
r_scbond_it
r_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1628
Nucleic Acid Atoms	181
Solvent Atoms	177
Heterogen Atoms	2

Software

Software
Software Name	Purpose
DNA	data collection
PHASES	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling