4PHC

Crystal Structure of a human cytosolic histidyl-tRNA synthetase, histidine-bound

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		298	0.1 M Tris pH 7 to 9, 0.2 M MgCl2 and 20 to 32.5% PEG 3350

Crystal Properties
Matthews coefficient	Solvent content
2.35	47.69

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 89.087	α = 90
b = 92.993	β = 90
c = 261.083	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	100	PIXEL	DECTRIS PILATUS 6M		2012-02-06	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL12-2	0.98	SSRL	BL12-2

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	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	2.84	39.41	95.3	0.148	0.075	9	4.3		49252

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.84	2.94	89.4		0.983	0.51	1.6	3.9	4201

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	MOLECULAR REPLACEMENT	THROUGHOUT	2.844	39.41	49209	2504	94.69	0.2024	0.2005	0.238	RANDOM	62.176

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]
-0.82			-0.04		0.86

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	39.289
r_dihedral_angle_4_deg	18.512
r_dihedral_angle_3_deg	14.481
r_dihedral_angle_1_deg	5.419
r_mcangle_it	2.517
r_mcbond_it	1.469
r_mcbond_other	1.469
r_angle_refined_deg	1.157
r_angle_other_deg	0.957
r_chiral_restr	0.062
r_bond_refined_d	0.007
r_bond_other_d	0.004
r_gen_planes_refined	0.004
r_gen_planes_other	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	13957
Nucleic Acid Atoms
Solvent Atoms	55
Heterogen Atoms	68

Software

Software
Software Name	Purpose
XDS	data reduction
Aimless	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
PHASER	phasing