Experiment: 3RAC

Crystal Structure of Histidine--tRNA ligase subunit from Alicyclobacillus acidocaldarius subsp. acidocaldarius DSM 446.

X-RAY DIFFRACTION

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	298	0.045M DL-Malic acid, 0.075M sodium formate 0.1M Na-Hepes 7.0, 10% PEG3350, VAPOR DIFFUSION, SITTING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.6	52.65

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 69.276	α = 90
b = 69.276	β = 90
c = 177.643	γ = 90

Symmetry
Space Group	P 41 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	SBC-3	mirrors	2010-10-11	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	APS BEAMLINE 19-ID	0.97920	APS	19-ID

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	2.3	50	99.2	0.105	24.7	7.8		33816			51.2

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	2.3	2.34	99.1		0.868	2.2	7.3	965

Refinement

Statistics
Diffraction ID	Structure Solution Method	Resolution (High)	Resolution (Low)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Factor (Observed)	R-Work (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	SAD	2.301	37.744	33816	1720	92.25	0.1917	0.1893	0.2169	0.2389	0.2591

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]
8.5502			8.5502		-17.1004

RMS Deviations
Key	Refinement Restraint Deviation
f_dihedral_angle_d	14.962
f_angle_d	1.094
f_chiral_restr	0.073
f_bond_d	0.008
f_plane_restr	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2633
Nucleic Acid Atoms
Solvent Atoms	90
Heterogen Atoms	25

Software

Software
Software Name	Purpose
HKL-3000	data collection
MLPHARE	phasing
PHENIX	refinement
HKL-3000	data reduction
HKL-3000	data scaling