1ZH6

Crystal Structure of p-acetylphenylalanine-tRNA synthetase in complex with p-acetylphenylalanine

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	8.5	293	20% PEG-300, 5% PEG-8000,10% glycerol 0.1M Tris, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.7	54

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 103.362	α = 90
b = 103.362	β = 90
c = 70.837	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		2004-07-31	M	SINGLE WAVELENGTH

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

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	2.5	100	99.1	0.096	0.096	17.9		13751	13751

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	2.5	2.59	97.3		0.557	0.557	2.2		1311

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Resolution (High)	Resolution (Low)	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	isomorphous with 1ZH0	THROUGHOUT	2.5	73.13	12978	12978	700	99.12	0.213	0.213	0.2094	0.27773	RANDOM	39.412

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]
0.85			0.85		-1.7

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.557
r_dihedral_angle_3_deg	18.63
r_dihedral_angle_4_deg	18.333
r_scangle_it	6.357
r_dihedral_angle_1_deg	6.218
r_scbond_it	4.594
r_mcangle_it	1.888
r_angle_refined_deg	1.373
r_mcbond_it	1.186
r_angle_other_deg	0.758
r_nbd_refined	0.234
r_symmetry_vdw_refined	0.21
r_symmetry_vdw_other	0.189
r_nbtor_refined	0.187
r_nbd_other	0.183
r_xyhbond_nbd_refined	0.174
r_mcbond_other	0.121
r_nbtor_other	0.088
r_chiral_restr	0.08
r_symmetry_hbond_refined	0.078
r_bond_refined_d	0.012
r_gen_planes_refined	0.004
r_bond_other_d	0.001
r_gen_planes_other	0.001

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2462
Nucleic Acid Atoms
Solvent Atoms	80
Heterogen Atoms	23

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
SCALEPACK	data scaling
CCP4	phasing