3HXW

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

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7.5	277	27% PEG 400, 0.1 M HEPES pH 7.5, vapor diffusion, sitting drop, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
4.16	70.46

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 114.858	α = 90
b = 114.858	β = 90
c = 126.081	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		2008-06-26	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	SSRL BEAMLINE BL9-1	0.97946	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	1.93	50	99.9	0.076	48.194	28.5		63820

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)
	1.93	2	98.8		0.321		25.2	6209

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	1.93	42.45	63734	3234	99.89	0.159	0.158	0.18	RANDOM	27.338

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]
-0.59			-0.59		1.17

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	30.796
r_dihedral_angle_4_deg	13.513
r_dihedral_angle_3_deg	10.423
r_scangle_it	7.18
r_scbond_it	5.023
r_dihedral_angle_1_deg	4.614
r_mcangle_it	4.381
r_mcbond_it	4.078
r_angle_refined_deg	0.865
r_nbtor_refined	0.319
r_symmetry_hbond_refined	0.204
r_nbd_refined	0.188
r_xyhbond_nbd_refined	0.174
r_symmetry_vdw_refined	0.173
r_chiral_restr	0.06
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	775
Heterogen Atoms	68

Software

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