5UNA

Fragment of 7SK snRNA methylphosphate capping enzyme

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	293	Pre-incubated with SAM in 10-fold stoichiometric excess. Reservoir: 22% PEG 3350, 0.1 M Ammonium Sulfate, 0.1 M Tris-HCl.
2	VAPOR DIFFUSION, HANGING DROP	8	291	Purified protein (10 mg/mL) was complexed with S-adenosyl-L-methionine in a 1:10 stoichiometric ratio. This solution (2 muL) was then mixed with precipitant: 22% PEG 3350, 0.1 M ammonium sulfate, 0.1 M TRIS-HCl.

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 183.24	α = 90
b = 183.24	β = 90
c = 151.39	γ = 120

Symmetry
Space Group	H 3

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	ADSC QUANTUM 315		2008-09-22	M	MAD

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ESRF BEAMLINE ID14-4	0.97600	ESRF	ID14-4

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim 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	2.5	44.2	99.6	0.062	0.068	0.029	0.999	18.3	5.7		65295			81.56

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rrim I (All)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.5	2.56	100		1.101	1.212	0.504	0.616		5.8	4645

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	MAD	THROUGHOUT	2.55	25.7	61497	1909	99.6	0.204	0.204	0.217	CCP4 FREERFLAG	90.63

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]
2.6238			2.6238		-5.2476

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	18.86
t_omega_torsion	3.02
t_angle_deg	1.07
t_bond_d	0.01
t_dihedral_angle_d
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion

RMS Deviations
Key	Refinement Restraint Deviation
t_other_torsion	18.86
t_omega_torsion	3.02
t_angle_deg	1.07
t_bond_d	0.01
t_dihedral_angle_d
t_trig_c_planes
t_gen_planes
t_it
t_nbd
t_improper_torsion
t_pseud_angle
t_chiral_improper_torsion
t_sum_occupancies
t_utility_distance
t_utility_angle
t_utility_torsion
t_ideal_dist_contact

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9476
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms	179

Software

Software
Software Name	Purpose
BUSTER	refinement
Aimless	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SOLVE	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 R01GM157729.