6UU7

E. coli sigma-S transcription initiation complex with a 6-nt RNA and an NTP ("Old" crystal soaked with UTP, CTP, ddGTP, and dinucleotide ApG for 30 minutes)

X-RAY DIFFRACTION

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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
2.69	54.31

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 132.936	α = 90
b = 153.772	β = 90
c = 232.616	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		2017-07-06	M	SINGLE WAVELENGTH

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

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	4.4	49.2	99.4	0.998	7.04	6.7		30874

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	4.4	4.66	97.3		0.208	0.43	6.7

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 (All)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	5IPL	4.4	49.148	30724	1464	99.199	0.347	0.3444	0.3897	0	280.214

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]
0.689			-0.215		-0.475

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	28.434
r_lrange_it	22.297
r_lrange_other	22.297
r_dihedral_angle_3_deg	19.38
r_dihedral_angle_4_deg	16.869
r_mcangle_it	8.47
r_mcangle_other	8.47
r_dihedral_angle_1_deg	6.565
r_scangle_it	6.194
r_scangle_other	6.194
r_mcbond_it	4.698
r_mcbond_other	4.698
r_scbond_it	3.278
r_scbond_other	3.274
r_angle_refined_deg	1.399
r_angle_other_deg	0.714
r_symmetry_xyhbond_nbd_refined	0.343
r_xyhbond_nbd_refined	0.262
r_nbd_other	0.258
r_symmetry_nbd_other	0.231
r_nbd_refined	0.223
r_symmetry_nbd_refined	0.215
r_symmetry_xyhbond_nbd_other	0.169
r_nbtor_refined	0.155
r_ncsr_local_group_1	0.127
r_chiral_restr	0.062
r_gen_planes_refined	0.048
r_gen_planes_other	0.043
r_bond_refined_d	0.006
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	27530
Nucleic Acid Atoms	1349
Solvent Atoms
Heterogen Atoms	55

Software

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