1ZH5

Structural basis for recognition of UUUOH 3'-terminii of nascent RNA pol III transcripts by La autoantigen

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	277	PEG 8000, lithium sulfate, potassium chloride, sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
2.4	40

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 156.209	α = 90
b = 55.03	β = 90
c = 57.782	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	ADSC QUANTUM 315	mirrors	2005-02-16	M	SINGLE WAVELENGTH
2	1	x-ray		CCD	ADSC QUANTUM 315	mirrors	2005-01-26	M	MAD
1,2	1

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X25	1.1000	NSLS	X25
2	SYNCHROTRON	NSLS BEAMLINE X25	0.9798, 0.9795, 0.9611	NSLS	X25

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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
1,2	1.85	20	99.4	0.103	14.9	5.3		42919	2	2

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)
1,2	1.85	1.92	99.4		0.496	3.7	5.3	4221

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MAD	THROUGHOUT	1.85	19.92	2	40918	2192	99.37	0.20252	0.20022	0.2014	0.24528	0.2471	RANDOM	25.172

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]
-0.18			0.09		0.08

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.831
r_dihedral_angle_4_deg	15.754
r_dihedral_angle_3_deg	13.404
r_dihedral_angle_1_deg	6.037
r_scangle_it	3.266
r_scbond_it	2.167
r_angle_refined_deg	1.681
r_mcangle_it	1.377
r_mcbond_it	0.91
r_nbtor_refined	0.298
r_nbd_refined	0.208
r_xyhbond_nbd_refined	0.186
r_symmetry_hbond_refined	0.183
r_symmetry_vdw_refined	0.176
r_chiral_restr	0.113
r_bond_refined_d	0.011
r_gen_planes_refined	0.007
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_other
r_nbtor_other
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3050
Nucleic Acid Atoms	366
Solvent Atoms	455
Heterogen Atoms	15

Software

Software
Software Name	Purpose
REFMAC	refinement
CBASS	data collection
HKL-2000	data scaling
SHARP	phasing