2R92

Elongation complex of RNA polymerase II with artificial RdRP scaffold

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7	295	5% (w/v) PEG 6000, 200 mM ammonium acetate, 150 mM magnesium acetate, 50 mM Hepes pH 7.0, 5 mM TCEP, VAPOR DIFFUSION, HANGING DROP, temperature 295.0K, pH 7.00

Crystal Properties
Matthews coefficient	Solvent content
5.92	79.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 222.675	α = 90
b = 393.853	β = 90
c = 283.551	γ = 90

Symmetry
Space Group	C 2 2 21

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	MARMOSAIC 225 mm CCD		2007-02-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA		SLS	X06SA

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	3.8	50	99.9	0.077	21.38	8.5		122098

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)
	3.8	3.94	100		0.335	6.77	8.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (All)	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	3.8	50	122098	122098	2431		0.212	0.212	0.246	THE SAME SET OF REFLECTIONS THAT HAS BEEN EXCLUDED FROM PREVIOUS POL II STRUCTURE DETERMINATIONS HAVE BEEN USED. KETTENBERGER ET AL. MOL. CELL 16, 955-965 (2004)

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]

RMS Deviations
Key	Refinement Restraint Deviation
c_angle_deg	1.47
c_bond_d	0.008
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d
c_improper_angle_d_na
c_improper_angle_d_prot
c_mcbond_it
c_mcangle_it
c_scbond_it
c_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	31207
Nucleic Acid Atoms	400
Solvent Atoms
Heterogen Atoms	9

Software

Software
Software Name	Purpose
MAR345	data collection
PHASER	phasing
CNS	refinement