3GTG

Backtracked RNA polymerase II complex with 12mer RNA

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6	298	390mM (NH4)2HPO4/NaH2PO4, pH 6.0, 50mM Dioxane, 10mM DTT, 9-11% PEG 6000, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
3.74	67.11

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 170.956	α = 90
b = 223.004	β = 102.28
c = 195.412	γ = 90

Symmetry
Space Group	C 1 2 1

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 325 mm CCD		2007-06-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL11-1	0.98	SSRL	BL11-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	3.78	50	96.3	8.6	3		67914

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	3.78	3.94	94.4		1.7	2.7

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	MOLECULAR REPLACEMENT	THROUGHOUT	PDB entry 1R9T	3.78	50	64473	3441	95.39	0.25497	0.25259	0.29986	RANDOM	143.007

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]
3.87		-9.5	-6.04		-1.87

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.393
r_dihedral_angle_3_deg	22.858
r_dihedral_angle_4_deg	19.468
r_dihedral_angle_1_deg	8.463
r_mcangle_it	4.287
r_scangle_it	3.018
r_mcbond_it	2.408
r_scbond_it	1.63
r_angle_refined_deg	1.593
r_symmetry_vdw_refined	0.32
r_nbtor_refined	0.318
r_nbd_refined	0.28
r_symmetry_hbond_refined	0.28
r_metal_ion_refined	0.21
r_xyhbond_nbd_refined	0.195
r_chiral_restr	0.111
r_bond_refined_d	0.011
r_gen_planes_refined	0.006
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_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	28948
Nucleic Acid Atoms	1110
Solvent Atoms	1
Heterogen Atoms	9

Software

Software
Software Name	Purpose
MAR345	data collection
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling