6SQN

Structure of the U1A variant A1-98 Y31H/Q36R/F56W triple mutant co-crystallized with RNA

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	293	1.2 M ammonium sulfate, 0.1 M tri-potassium citrate

Crystal Properties
Matthews coefficient	Solvent content
3.36	63.38

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 96.938	α = 90
b = 96.938	β = 90
c = 258.73	γ = 120

Symmetry
Space Group	P 65 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	PIXEL	DECTRIS PILATUS 6M		2019-04-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PETRA III, DESY BEAMLINE P11	1.03320	PETRA III, DESY	P11

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.05	51.74	100	0.199	0.201	0.999	18.2	38		49417

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.05	2.09	99.9		2.383	2.414	0.683		39.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	1URN	2.05	48.52	46908	2509	99.91	0.2306	0.2297	0.2488	RANDOM	36.892

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]
-0.04	-0.02		-0.04		0.14

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.002
r_dihedral_angle_4_deg	22.852
r_dihedral_angle_3_deg	15.867
r_dihedral_angle_1_deg	6.959
r_angle_refined_deg	1.661
r_angle_other_deg	1.423
r_chiral_restr	0.091
r_bond_refined_d	0.01
r_gen_planes_refined	0.01
r_bond_other_d	0.001

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.002
r_dihedral_angle_4_deg	22.852
r_dihedral_angle_3_deg	15.867
r_dihedral_angle_1_deg	6.959
r_angle_refined_deg	1.661
r_angle_other_deg	1.423
r_chiral_restr	0.091
r_bond_refined_d	0.01
r_gen_planes_refined	0.01
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2335
Nucleic Acid Atoms	993
Solvent Atoms	95
Heterogen Atoms

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
xia2	data reduction
Aimless	data scaling
PHASER	phasing

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 R01GM133198.