2HT1

The closed ring structure of the Rho transcription termination factor in complex with nucleic acid in the motor domains

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	Microbatch under paraffine oil	6.5	291	50 mM Na cacodylate, 10 mM MgOAc, 1.8 M LiSO4, 2% benzamidine, 10 mM spermine-HCl, pH 6.5, Microbatch under paraffine oil, temperature 291K

Crystal Properties
Matthews coefficient	Solvent content
3.87	68.19

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 257.686	α = 90
b = 257.686	β = 90
c = 257.686	γ = 90

Symmetry
Space Group	I 4 3 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100					M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 8.3.1	1.1	ALS	8.3.1

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	3.5	20	92				15818	2	2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.5	3.68	86.9

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	PDB ENTRY 1PVO	3.51	20	1.7	15818	854	91.9	0.2857	0.28707	0.29446	0.3281	RANDOM	118.555

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]

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.54
r_dihedral_angle_3_deg	17.819
r_dihedral_angle_4_deg	13.812
r_dihedral_angle_1_deg	4.85
r_angle_refined_deg	0.95
r_nbtor_refined	0.3
r_nbd_refined	0.195
r_symmetry_vdw_refined	0.18
r_xyhbond_nbd_refined	0.135
r_symmetry_hbond_refined	0.093

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.54
r_dihedral_angle_3_deg	17.819
r_dihedral_angle_4_deg	13.812
r_dihedral_angle_1_deg	4.85
r_angle_refined_deg	0.95
r_nbtor_refined	0.3
r_nbd_refined	0.195
r_symmetry_vdw_refined	0.18
r_xyhbond_nbd_refined	0.135
r_symmetry_hbond_refined	0.093
r_chiral_restr	0.062
r_bond_refined_d	0.006
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5042
Nucleic Acid Atoms	171
Solvent Atoms
Heterogen Atoms	10

Software

Software
Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.