2NS8

How an in vitro selected peptide mimics the antibiotic tetracycline to induce TET repressor

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.8	292	4M sodium formate, 0.1M Tris-HCl, pH 7.8, VAPOR DIFFUSION, HANGING DROP, temperature 292K

Crystal Properties
Matthews coefficient	Solvent content
2.49	50.56

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 77.89	α = 90
b = 200.59	β = 90
c = 65.28	γ = 90

Symmetry
Space Group	P 21 21 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	IMAGE PLATE	MAR scanner 345 mm plate	mirrors	2004-10-13	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.2	0.918	BESSY	14.2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	2.55	40	99.4	0.09	14.93			33932		-3	43.938

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.55	2.71	98.2		0.483	3.7		5316

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 2TCT	2.55	30	33914	2713	100	0.211	0.206	0.27	RANDOM	46.989

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]
1.52			-3.15		1.63

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	40.724
r_dihedral_angle_3_deg	19.243
r_dihedral_angle_4_deg	16.824
r_dihedral_angle_1_deg	6.2
r_scangle_it	1.91
r_angle_refined_deg	1.38
r_scbond_it	1.252
r_angle_other_deg	0.841
r_mcangle_it	0.824
r_mcbond_it	0.691
r_symmetry_vdw_other	0.248
r_nbd_refined	0.234
r_nbtor_refined	0.187
r_nbd_other	0.174
r_symmetry_vdw_refined	0.157
r_xyhbond_nbd_refined	0.138
r_mcbond_other	0.101
r_symmetry_hbond_refined	0.099
r_nbtor_other	0.091
r_chiral_restr	0.074
r_bond_refined_d	0.013
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6884
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms

Software

Software
Software Name	Purpose
XSCALE	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
XDS	data reduction
AMoRE	phasing