4V6G

Initiation complex of 70S ribosome with two tRNAs and mRNA.

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	3I8F	3I8F, 3I8G, 3I8H, 3I8I
experimental model	PDB	3I8G	3I8F, 3I8G, 3I8H, 3I8I
experimental model	PDB	3I8H	3I8F, 3I8G, 3I8H, 3I8I
experimental model	PDB	3I8I	3I8F, 3I8G, 3I8H, 3I8I

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION	7.5	293	4% PEG20K, 4% PEGMME 550, 100mM Tris/HAc, 200mM KSCN, pH 7.5, vapor diffusion, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
3.37	63.46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 210.46	α = 90
b = 452.18	β = 90
c = 626.12	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	PSI PILATUS 6M		2008-11-10	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X06SA	1.000	SLS	X06SA

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	R Sym 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	3.5	300	96.7	0.285	0.177	7.13	12.36	743905	719306			96.091

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	3.5	3.6	88.9		0.568	0.568	1.98	12.1	53168

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	3I8F, 3I8G, 3I8H, 3I8I	3.5	300	719306	719306	22133	96.7	0.213	0.252	RANDOM	126.967

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
c_angle_deg	1.4001
c_bond_d	0.008245

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	19242
Nucleic Acid Atoms	36382
Solvent Atoms
Heterogen Atoms	1219

Software

Software
Software Name	Purpose
CNS	refinement
PDB_EXTRACT	data extraction
XDS	data scaling
XDS	data reduction
XSCALE	data scaling
CNS	phasing

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.