2PXH

Crystal structure of a bipyridylalanyl-tRNA synthetase

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5	293	16-20% PEG300, 5% PEG8K, 100 mM Tris, 10% glycerol, PH 7.5-9.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.57	52.22

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 100.841	α = 90
b = 100.841	β = 90
c = 71.072	γ = 90

Symmetry
Space Group	P 43 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	ADSC QUANTUM 4		2006-05-09	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	ALS BEAMLINE 5.0.3		ALS	5.0.3

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	1.97	100	99.7	0.082	26.2	7.7	25139	25063		5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.97	2.05	98.2		0.496

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (All)	R-Factor (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	pdb entry 1j1u	1.97	71.25	2	25139	25063	1349	99.73	0.193	0.193	0.191	0.242	RANDOM	30.856

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]
1.1			1.1		-2.21

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.297
r_dihedral_angle_3_deg	16.375
r_dihedral_angle_4_deg	14.419
r_dihedral_angle_1_deg	6.812
r_scangle_it	5.04
r_scbond_it	3.089
r_mcangle_it	1.752
r_angle_refined_deg	1.692
r_mcbond_it	1.119
r_nbtor_refined	0.314
r_nbd_refined	0.231
r_xyhbond_nbd_refined	0.201
r_symmetry_vdw_refined	0.189
r_symmetry_hbond_refined	0.176
r_chiral_restr	0.141
r_bond_refined_d	0.017
r_gen_planes_refined	0.008

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2452
Nucleic Acid Atoms
Solvent Atoms	278
Heterogen Atoms	18

Software

Software
Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
AMoRE	phasing