6UTV

E. coli sigma-S transcription initiation complex with a 6-nt RNA ("Fresh" crystal soaked with CTP, UTP, GTP, and ddATP for 150 seconds)

X-RAY DIFFRACTION

---

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	5IPL

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8	295	PEG3350, sodium chloride, HEPES

Crystal Properties
Matthews coefficient	Solvent content
2.71	54.63

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 132.532	α = 90
b = 155.431	β = 90
c = 232.601	γ = 90

Symmetry
Space Group	P 21 21 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	PIXEL	DECTRIS PILATUS 6M-F		2017-08-12	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 24-ID-C	0.9792	APS	24-ID-C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	CC (Half)	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	3.45	49.3	99.7	0.999	12.95	12.3		63761

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.45	3.66	98.4		0.216	0.52	12.24

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 (All)	R-Work	R-Free	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	5IPL	3.45	49.279	63485	3029	99.24	0.285	0.2819	0.348	180.678

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]
0.118			0.094		-0.211

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	21.542
r_lrange_it	17.105
r_lrange_other	17.105
r_dihedral_angle_3_deg	15.306
r_dihedral_angle_4_deg	13.532
r_mcangle_it	9.116
r_mcangle_other	9.116
r_scangle_it	7.735
r_scangle_other	7.728
r_dihedral_angle_1_deg	5.973
r_mcbond_it	5.434
r_mcbond_other	5.434
r_scbond_it	4.461
r_scbond_other	4.455
r_angle_refined_deg	1.341
r_angle_other_deg	0.441
r_symmetry_xyhbond_nbd_refined	0.355
r_symmetry_nbd_refined	0.308
r_nbd_other	0.285
r_symmetry_nbd_other	0.21
r_xyhbond_nbd_refined	0.203
r_nbd_refined	0.196
r_ncsr_local_group_1	0.175
r_nbtor_refined	0.158
r_symmetry_xyhbond_nbd_other	0.138
r_gen_planes_refined	0.054
r_chiral_restr	0.05
r_gen_planes_other	0.049
r_bond_refined_d	0.006
r_bond_other_d	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	27579
Nucleic Acid Atoms	1471
Solvent Atoms
Heterogen Atoms	13

Software

Software
Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing