2UXB

Crystal structure of an extended tRNA anticodon stem loop in complex with its cognate mRNA GGGU in the context of the Thermus thermophilus 30S subunit.

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	6.5	277	MPD, AMMONIUM CHLORIDE, POTASSIUM CHLORIDE, MAGNESIUM ACETATE, SODIUM CACODYLATE, PH 6.5, VAPOR DIFFUSION, HANGING DROP AT 277K

Crystal Properties
Matthews coefficient	Solvent content
4.17	70.5

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 401.95	α = 90
b = 401.95	β = 90
c = 174.086	γ = 90

Symmetry
Space Group	P 41 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	CCD	MARRESEARCH		2006-02-17	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SLS BEAMLINE X10SA		SLS	X10SA

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	3.1	50	96.7	0.12	8.3	3.5		250188

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	3.1	3.2	94		0.61	2.1	3.5

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	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	OTHER	THROUGHOUT	3.1	29.88	250137	12509	98.1	0.295	0.295	0.328	RANDOM	75.3

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]
-3.29			-3.29		6.57

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	28.5
c_improper_angle_d	1.51
c_angle_deg	1.2
c_bond_d	0.007
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot
c_mcbond_it
c_mcangle_it
c_scbond_it
c_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	19237
Nucleic Acid Atoms	32744
Solvent Atoms
Heterogen Atoms	185

Software

Software
Software Name	Purpose
CNS	refinement
XDS	data reduction
XDS	data scaling
CNS	phasing