1W56

Stepwise introduction of zinc binding site into porphobilinogen synthase of Pseudomonas aeruginosa (mutations A129C and D131C)

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1B4K	PDB ENTRY 1B4K

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7.5		HANGING DROP. DROPS WERE MIXED OF 5 MICROLITER OF PROTEIN SOLUTION (9 MG/ML PROTEIN, 50 MM NA-HEPES PH 7.5, 10MM MGCL2, 10MM ZNCL2, 10 MM DTT) PLUS 5 MICROLITER OF RESERVOIR SOLUTION (31.5 % (W/V) PEG 400, 100MM NA-HEPES PH 7.5, 20 MM MGCL2, 20MM BETA-MERCAPTOETHANOLE) ON GLASS COVER SLIDES,HANGING ABOVE 500 MICROLITER OF RESERVOIR SOLUTION.

Crystal Properties
Matthews coefficient	Solvent content
2.22	45.07

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 126.32	α = 90
b = 126.32	β = 90
c = 85.628	γ = 90

Symmetry
Space Group	P 4 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	MARRESEARCH		2002-08-20	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	MPG/DESY, HAMBURG BEAMLINE BW6		MPG/DESY, HAMBURG	BW6

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	20	98.5	0.052	17.8	4.3		75220

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	98		0.33	3.2	4.3

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	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	PDB ENTRY 1B4K	1.7	87.71	71529	3768	98.5	0.14	0.138	0.182	RANDOM	18.92

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]
0.15			0.15		-0.31

RMS Deviations
Key	Refinement Restraint Deviation
r_scangle_it	7.696
r_dihedral_angle_1_deg	6.145
r_scbond_it	5.335
r_mcangle_it	4.335
r_mcbond_it	3.277
r_angle_refined_deg	2.102
r_angle_other_deg	1.017
r_symmetry_vdw_refined	0.479
r_symmetry_vdw_other	0.345
r_nbd_other	0.259
r_nbd_refined	0.223
r_symmetry_hbond_refined	0.178
r_chiral_restr	0.164
r_xyhbond_nbd_refined	0.15
r_nbtor_other	0.089
r_bond_refined_d	0.025
r_gen_planes_refined	0.009
r_gen_planes_other	0.009
r_bond_other_d	0.002
r_dihedral_angle_2_deg
r_dihedral_angle_3_deg
r_dihedral_angle_4_deg
r_nbtor_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_mcangle_other
r_scbond_other
r_scangle_other
r_long_range_B_refined
r_long_range_B_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	5051
Nucleic Acid Atoms
Solvent Atoms	693
Heterogen Atoms	13

Software

Software
Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing