3HXU

Crystal Structure of catalytic fragment of E. coli AlaRS in complex with AlaSA

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.8	277	30% PEG 400, 0.1 M HEPES, pH 7.8, vapor diffusion, sitting drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
4.13	70.24

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 114.754	α = 90
b = 114.754	β = 90
c = 125.37	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	ADSC QUANTUM 315r		2008-04-15	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.97950	SSRL	BL9-1

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge 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	2.1	50	100	0.074	41.456	14		49672

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
	2.1	2.18	100		0.215		14.1	4863

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	2.1	50	49399	2496	100	0.155	0.154	0.191	RANDOM	24.815

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]
-0.32			-0.32		0.64

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.142
r_dihedral_angle_4_deg	13.723
r_dihedral_angle_3_deg	11.244
r_scangle_it	7.443
r_scbond_it	5.41
r_mcangle_it	4.828
r_dihedral_angle_1_deg	4.573
r_mcbond_it	4.227
r_angle_refined_deg	0.975
r_chiral_restr	0.409
r_nbtor_refined	0.317
r_xyhbond_nbd_refined	0.199
r_nbd_refined	0.193
r_symmetry_vdw_refined	0.191
r_symmetry_hbond_refined	0.177
r_bond_refined_d	0.005
r_gen_planes_refined	0.002

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	3516
Nucleic Acid Atoms
Solvent Atoms	631
Heterogen Atoms	59

Software

Software
Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection