3LTI

Crystal structure of the Escherichia coli RNA polymerase beta subunit beta2-betai4 domains

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	298	0.2 M potassium-sodium tartrate, 20% PEG 3350, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.47	50.18

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 106.314	α = 90
b = 52.039	β = 90
c = 61.826	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	180	CCD	MAR CCD 165 mm		2009-07-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X3A	0.9919	NSLS	X3A

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	1.6	25	98.5	0.069	40	7		42737

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.6	1.64	94		0.416	5.1	6.5

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	SAD	THROUGHOUT	1.6	14.98	42737	1398	98.5	0.20884	0.20791	0.22955	RANDOM	11.586

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]
1.02			-0.55		-0.47

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	31.549
r_dihedral_angle_4_deg	13.423
r_dihedral_angle_3_deg	11.373
r_dihedral_angle_1_deg	6.059
r_scangle_it	2.456
r_scbond_it	1.435
r_angle_refined_deg	1.134
r_mcangle_it	0.983
r_angle_other_deg	0.812
r_mcbond_it	0.514
r_mcbond_other	0.083
r_chiral_restr	0.062
r_bond_refined_d	0.008
r_gen_planes_refined	0.004
r_bond_other_d	0.002
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_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2317
Nucleic Acid Atoms
Solvent Atoms	378
Heterogen Atoms

Software

Software
Software Name	Purpose
MAR345dtb	data collection
SHARP	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling