2OJP

The crystal structure of a dimeric mutant of Dihydrodipicolinate synthase from E.coli- DHDPS-L197Y

X-RAY DIFFRACTION

---

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	8	277	PEG 1500, TRIS HCL, pH 8.00, VAPOR DIFFUSION, HANGING DROP, temperature 277K

Crystal Properties
Matthews coefficient	Solvent content
3.09	60.23

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 60.482	α = 90
b = 106.705	β = 90
c = 120.657	γ = 90

Symmetry
Space Group	P 21 21 21

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	110	IMAGE PLATE	RIGAKU RAXIS IV			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU

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	1.7	39.97	99.5	0.072	10.8	3.63		86208		3

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	1.7	1.76	99.8		0.337	3.5

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	1.7	34.12	83961	2180	100	0.186	0.185	0.228	RANDOM	17.16

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]
-0.48			0.37		0.11

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	33.862
r_dihedral_angle_4_deg	20.262
r_dihedral_angle_3_deg	12.752
r_dihedral_angle_1_deg	5.97
r_scangle_it	3.28
r_scbond_it	2.239
r_angle_refined_deg	1.343
r_mcangle_it	1.17
r_mcbond_it	0.887
r_angle_other_deg	0.841
r_symmetry_vdw_other	0.256
r_nbd_refined	0.215
r_nbd_other	0.182
r_mcbond_other	0.181
r_nbtor_refined	0.166
r_xyhbond_nbd_refined	0.153
r_symmetry_hbond_refined	0.138
r_xyhbond_nbd_other	0.109
r_nbtor_other	0.087
r_chiral_restr	0.08
r_symmetry_vdw_refined	0.062
r_bond_refined_d	0.011
r_gen_planes_refined	0.005
r_bond_other_d	0.003
r_gen_planes_other	0.001
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4394
Nucleic Acid Atoms
Solvent Atoms	793
Heterogen Atoms	12

Software

Software
Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
d*TREK	data scaling