6SQQ

Structure of the U1A variant A1-98 Y31H/Q36R/F56W triple mutant in complex with RNA obtained by soaking

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	293	2.2 M ammonium sulfate, 0.2 M tri-potassium citrate

Crystal Properties
Matthews coefficient	Solvent content
3.62	65.98

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 96.08	α = 90
b = 96.08	β = 90
c = 258.01	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	2.37	51.6	100	0.29	0.293	0.998	12.4	38.2		29657

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	2.37	2.41	99.9		2.601	2.633	0.753	1.4	40.2

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 (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	1URN	2.37	51.031	29570	1498	99.939	0.248	0.2452	0.2941	43.941

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]
0.775	0.387		0.775		-2.513

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.591
r_dihedral_angle_4_deg	23.34
r_dihedral_angle_3_deg	16.201
r_lrange_other	7.474
r_lrange_it	7.472
r_dihedral_angle_1_deg	7.059
r_scangle_it	6.029
r_scangle_other	6.029
r_scbond_it	4.259
r_scbond_other	4.251
r_mcangle_it	4.135
r_mcangle_other	4.134
r_mcbond_it	2.973
r_mcbond_other	2.972
r_angle_refined_deg	1.592
r_angle_other_deg	1.323
r_nbd_other	0.231
r_symmetry_nbd_other	0.203
r_nbd_refined	0.199
r_nbtor_refined	0.191
r_xyhbond_nbd_refined	0.156
r_symmetry_xyhbond_nbd_other	0.115
r_chiral_restr	0.087
r_symmetry_nbd_refined	0.083
r_symmetry_nbtor_other	0.076
r_symmetry_xyhbond_nbd_refined	0.048
r_bond_refined_d	0.009
r_gen_planes_refined	0.008
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2269
Nucleic Acid Atoms	1008
Solvent Atoms	26
Heterogen Atoms	1

Software

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