Experiment: 3QSY

Recognition of the methionylated initiator tRNA by the translation initiation factor 2 in Archaea

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2AHO	PDB ENTRY 2AHO

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	285	45% ammonium sulphate, 30mM Tris-HCl, 5mM MES, 7mM MgCl2, 0.5mM DTT, 0.2mM GDPNP, 300mM NDSB 195, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 285.0K

Crystal Properties
Matthews coefficient	Solvent content
3.46	64.46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 93.68	α = 90
b = 93.68	β = 90
c = 220.03	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	198.3	CCD	MARMOSAIC 225 mm CCD		2008-10-24	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	BESSY BEAMLINE 14.2	0.91841	BESSY	14.2

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	25	99.6			23160	23068

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	3.1	99.9

Refinement

Statistics
Diffraction ID	Structure Solution 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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	PDB ENTRY 2AHO	3.2	14.95	2.1	17676	940	93.31	0.2786	0.2783	0.2879	0.3025	0.3114	RANDOM	129.8513

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]
-54.4318			-54.4318		108.8636

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	19.968
f_angle_d	1.307
f_chiral_restr	0.087
f_bond_d	0.009
f_plane_restr	0.006

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3914
Nucleic Acid Atoms	1639
Solvent Atoms
Heterogen Atoms	40

Software

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