4ICR

Structural basis for substrate recognition and reaction mechanism of bacterial aminopeptidase peps

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		10% 2-PROPANOL, 0.2M ZINC ACETATE, PH 6.5, MICROBATCH, TEMPERATURE 295K

Crystal Properties
Matthews coefficient	Solvent content
2.86	56.94

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 94.278	α = 90
b = 185.277	β = 90
c = 59.237	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	CCD	BRUKER PROTEUM 300			M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PAL/PLS BEAMLINE 6B		PAL/PLS	6B

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Sym 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	2.17	50	99.6	0.105	19.97	7.2		55718

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.17	2.23	100		0.251	8	7.3

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	2.17	46.32	52831	2818	99.5	0.232	0.229	0.3	RANDOM	37.21

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]
0.02			0.17		-0.18

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	42.534
r_dihedral_angle_4_deg	19.283
r_dihedral_angle_3_deg	16.441
r_dihedral_angle_1_deg	6.258
r_scangle_it	5.254
r_scbond_it	3.447
r_angle_refined_deg	1.927
r_mcangle_it	1.81
r_mcbond_it	1.055
r_chiral_restr	0.139
r_bond_refined_d	0.025
r_gen_planes_refined	0.009
r_bond_other_d
r_angle_other_deg
r_gen_planes_other
r_nbd_refined
r_nbd_other
r_nbtor_refined
r_nbtor_other
r_xyhbond_nbd_refined
r_xyhbond_nbd_other
r_metal_ion_refined
r_metal_ion_other
r_symmetry_vdw_refined
r_symmetry_vdw_other
r_symmetry_hbond_refined
r_symmetry_hbond_other
r_symmetry_metal_ion_refined
r_symmetry_metal_ion_other
r_mcbond_other
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6262
Nucleic Acid Atoms
Solvent Atoms	457
Heterogen Atoms	24

Software

Software
Software Name	Purpose
EPMR	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling