4TOI

Crystal structure of E.coli ribosomal protein S2 in complex with N-terminal domain of S1

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2QBF	PDB entries 2qbf and 2oce
experimental model	PDB	2OCE	PDB entries 2qbf and 2oce

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.4	295.15	0.1 M HEPES-KOH, pH 7.4, 3 mM MgCl2, 7.5% w/v PEG 6000, 3% w/v 2-methyl-pentanediol-2,4, 100 mM KCl

Crystal Properties
Matthews coefficient	Solvent content
3.03	59.46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.28	α = 90
b = 87.28	β = 90
c = 94.36	γ = 120

Symmetry
Space Group	P 31 2 1

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		2012-05-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	DIAMOND BEAMLINE I04	0.98	Diamond	I04

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	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	2.3	37.79	99	0.175	0.063	0.993	7.4	8.1		18726			32.2

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.3	2.38	91.3		1.106	0.543	0.548	1.5	4.5	1670

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 (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	PDB entries 2qbf and 2oce	2.3	37.79	1.33	18587	949	98.34	0.1668	0.1636	0.2287	Random selection	42.5864

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
f_dihedral_angle_d	14.995
f_angle_d	1.09
f_chiral_restr	0.043
f_bond_d	0.008
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2375
Nucleic Acid Atoms
Solvent Atoms	168
Heterogen Atoms	1

Software

Software
Software Name	Purpose
XDS	data reduction
PDB_EXTRACT	data extraction
PHENIX	refinement
BALBES	phasing
Aimless	data scaling
XSCALE	data reduction

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), 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.