3H3V

Yeast RNAP II containing poly(A)-signal sequence in the active site

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		7	295	200 mM ammonium acetate, 50mM HEPES pH 7.0, 4% polyethylene glycol 6000, 5mM TCEP (tris (2-carboxyethyl) phosphine hydrochloride), VAPOR DIFFUSION, HANGING DROP, temperature 295.0 K

Crystal Properties
Matthews coefficient	Solvent content
5.82	78.87

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 222.47	α = 90
b = 391.62	β = 90
c = 284.12	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		2007-04-18	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA	0.918905	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	4	50	99.9	0.106	9.6	4.3		202368

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	4	4.25	100		0.516	2.7	4.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Starting model	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	PDB ENTRY 1Y1W	4	50	202368	202368	16372		0.205	0.205	0.241	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]
-23.709			-30.831		54.539

RMS Deviations
Key	Refinement Restraint Deviation
c_mcangle_it	2.707
c_scangle_it	2.665
c_scbond_it	1.503
c_angle_deg	1.48
c_mcbond_it	1.475
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

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	31097
Nucleic Acid Atoms	671
Solvent Atoms
Heterogen Atoms	9

Software

Software
Software Name	Purpose
MAR345	data collection
PHASER	phasing
CNS	refinement
XDS	data reduction
XSCALE	data scaling