1E22

LYSYL-TRNA SYNTHETASE (LYSU) HEXAGONAL FORM complexed with lysine and the non-hydrolysable atp analogue amp-pcp

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.8		THE PROTEIN WAS CONCENTRATED TO 12 MG/ML IN THE PRESENCE OF 5 MM LYSINE AND WAS CRYSTALLISED FROM 0.1 M PIPES PH 6.8, 0.5 M LICL, 20% PEG 4K, 17% GLYCEROL; THEN, A SMALL AMOUNT OF A SOLUTION CONTAINING AMP-PCP AND MGCL2 WAS ADDED TO THE DROP TO GET A FINAL CONCENTRATION OF ABOUT 5 MM.

Crystal Properties
Matthews coefficient	Solvent content
4.8	74

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 142.02	α = 90
b = 142.02	β = 90
c = 175.39	γ = 120

Symmetry
Space Group	P 61 2 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	MARRESEARCH	MIRROR	1995-06-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ELETTRA BEAMLINE 5.2R		ELETTRA	5.2R

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	2.43	25	84.7	0.065	0.065	8.1	3.6		33781

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	2.43	2.54	65.1		0.099	0.099	6.3	3.1

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	1E1O	2.43	12	33420	1347	84.7	0.176	0.176	0.228	RANDOM

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
x_dihedral_angle_d	20.4
x_scangle_it	6.9
x_scbond_it	4.52
x_mcangle_it	3.66
x_improper_angle_d	2.4
x_mcbond_it	2.39
x_angle_deg	1.4
x_bond_d	0.006
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3816
Nucleic Acid Atoms
Solvent Atoms	306
Heterogen Atoms	80

Software

Software
Software Name	Purpose
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling
X-PLOR	phasing