4YRO

Crystal structure of T. cruzi Histidyl-tRNA synthetase in complex with 5-bromo-6-methylpyridin-2-amine (Chem 491)

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP		298	0.2 M ammonium sulfate, 23 % to 28 % PEG 3350, 0.1 M sodium citrate pH 4.8 to 5.3, 1 mM TCEP

Crystal Properties
Matthews coefficient	Solvent content
2.47	50.11

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 64.63	α = 90
b = 118.264	β = 92.52
c = 66.109	γ = 90

Symmetry
Space Group	I 1 2 1

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	RIGAKU SATURN 944		2012-12-04	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007	1.54

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	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	33.85	98.4	0.063	0.05	0.997	14.4	2.3		16909

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Rpim I (All)	CC (Half)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.5	2.6	99.2		0.435	0.345	0.804	2.2	2.3	1931

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	3LC0	2.5	30	16036	871	98.28	0.1883	0.1861	0.2309	RANDOM	61.119

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]
-1.13		0.11	3.75		-2.62

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.799
r_dihedral_angle_4_deg	18.836
r_dihedral_angle_3_deg	14.954
r_dihedral_angle_1_deg	5.82
r_mcangle_it	1.401
r_angle_refined_deg	1.18
r_mcbond_it	0.827
r_mcbond_other	0.827
r_angle_other_deg	0.733
r_chiral_restr	0.06

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.799
r_dihedral_angle_4_deg	18.836
r_dihedral_angle_3_deg	14.954
r_dihedral_angle_1_deg	5.82
r_mcangle_it	1.401
r_angle_refined_deg	1.18
r_mcbond_it	0.827
r_mcbond_other	0.827
r_angle_other_deg	0.733
r_chiral_restr	0.06
r_bond_refined_d	0.007
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	3251
Nucleic Acid Atoms
Solvent Atoms	99
Heterogen Atoms	51

Software

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

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.