3HOJ

Crystal Structure of a Novel Engineered Retroaldolase: RA-22

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	4.6	298	0.2M AMMONIUM SULFATE, 0.1M SODIUM ACETATE PH 4.6, 27% PEG4000 FOLLOWED BY FURTHER EQUILIBRATION AFTER INITIAL CRYSTALLIZATION OVER 0.2M AMMONIUM SULFATE, 0.1M SODIUM ACETATE PH 4.6, 30% PEG4000, VAPOR DIFFUSION, HANGING DROP, temperature 298K

Crystal Properties
Matthews coefficient	Solvent content
2.21	44.28

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 72.047	α = 90
b = 73.583	β = 90
c = 47.399	γ = 90

Symmetry
Space Group	P 21 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	IMAGE PLATE	RIGAKU RAXIS IV++	mirrors	2007-05-24	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)	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	2.2	36.02	98.9	0.068	10.4	3.48		13187			40.2

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)
	2.2	2.28	97.2		0.258	3.8	2.89	1282

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	2.2	36.01	13184	648	98.56	0.238	0.236	0.293	RANDOM	25.724

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]
-0.34			-0.67		1

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	34.084
r_dihedral_angle_3_deg	18.209
r_dihedral_angle_4_deg	17.683
r_dihedral_angle_1_deg	5.568
r_scangle_it	2.276
r_scbond_it	1.385
r_angle_refined_deg	1.305
r_mcangle_it	0.829
r_mcbond_it	0.49
r_nbtor_refined	0.303
r_symmetry_vdw_refined	0.192
r_nbd_refined	0.188
r_symmetry_hbond_refined	0.167
r_xyhbond_nbd_refined	0.14
r_chiral_restr	0.083
r_bond_refined_d	0.009
r_gen_planes_refined	0.003

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	1925
Nucleic Acid Atoms
Solvent Atoms	145
Heterogen Atoms

Software

Software
Software Name	Purpose
d*TREK	data scaling
PHASER	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
d*TREK	data reduction