4XND

Crystal Structure of E. coli Aminopeptidase N in complex with L-Beta Homotryptophan

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2HPO

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	7	298	Sodium malonate

Crystal Properties
Matthews coefficient	Solvent content
3.65	66.32

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 121.12	α = 90
b = 121.12	β = 90
c = 170.781	γ = 120

Symmetry
Space Group	P 31 2 1

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++		2015-01-01	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU MICROMAX-007 HF	1.54

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	1.93	20	99.5	0.095	17.97	5.8		108172

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	1.93	2	98.6		3.2	5.5

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	2HPO	1.93	20	102499	5384	99.05	0.13507	0.13342	0.16612	RANDOM	24.599

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]
					0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	37.099
r_dihedral_angle_4_deg	18.553
r_dihedral_angle_3_deg	13.45
r_long_range_B_refined	8.498
r_long_range_B_other	8.169
r_scangle_other	6.236
r_dihedral_angle_1_deg	6.136
r_scbond_other	4.234
r_scbond_it	4.233
r_mcangle_it	2.612
r_mcangle_other	2.611
r_mcbond_it	2.055
r_mcbond_other	2.054
r_angle_refined_deg	2
r_angle_other_deg	1.072
r_chiral_restr	0.129
r_bond_refined_d	0.021
r_gen_planes_refined	0.012
r_bond_other_d	0.002
r_gen_planes_other	0.002
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_scangle_it
r_rigid_bond_restr
r_sphericity_free
r_sphericity_bonded

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	6940
Nucleic Acid Atoms
Solvent Atoms	865
Heterogen Atoms	255

Software

Software
Software Name	Purpose
REFMAC	refinement
HKL-3000	data reduction
HKL-3000	data scaling
MOLREP	phasing