6UU3

E. coli sigma-S transcription initiation complex with a 4-nt RNA and a CTP ("Old" crystal soaked with GTP, ATP, CTP, and ddTTP 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
2.67	53.88

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 132.555	α = 90
b = 153.578	β = 90
c = 231.214	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	0.97918	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	49.1	99.3	0.999	10.59	6.8		40237

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	4.24	96.4		0.171	0.48	6.5

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	4.002	49.08	40013	1924	98.685	0.307	0.3032	0.3804	0	276.41

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]
0.768			0.226		-0.994

RMS Deviations
Key	Refinement Restraint Deviation
r_lrange_it	29.783
r_lrange_other	29.783
r_dihedral_angle_2_deg	28.662
r_dihedral_angle_3_deg	19.561
r_dihedral_angle_4_deg	17.641
r_mcangle_it	16.557
r_mcangle_other	16.557
r_scangle_it	13.295
r_scangle_other	13.294
r_mcbond_it	9.785
r_mcbond_other	9.785
r_scbond_it	7.44
r_scbond_other	7.433
r_dihedral_angle_1_deg	6.575
r_angle_refined_deg	1.399
r_metal_ion_refined	0.716
r_angle_other_deg	0.549
r_symmetry_xyhbond_nbd_refined	0.434
r_xyhbond_nbd_other	0.359
r_nbd_other	0.324
r_symmetry_nbd_refined	0.302
r_xyhbond_nbd_refined	0.254
r_symmetry_nbd_other	0.233
r_nbd_refined	0.226
r_nbtor_refined	0.156
r_symmetry_xyhbond_nbd_other	0.15
r_ncsr_local_group_1	0.132
r_chiral_restr	0.059
r_gen_planes_refined	0.052
r_gen_planes_other	0.047
r_bond_refined_d	0.006
r_bond_other_d	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	27578
Nucleic Acid Atoms	1434
Solvent Atoms
Heterogen Atoms	52

Software

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