4J3B

A naturally variable residue in the S1 subsite of M1-family aminopeptidases modulates catalytic properties and promotes functional specialization

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION			VAPOR DIFFUSION

Crystal Properties
Matthews coefficient	Solvent content
2.27	45.79

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 75.95	α = 90
b = 109.46	β = 90
c = 112.91	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	100	CCD	ADSC QUANTUM 4		2011-07-20

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X26C		NSLS	X26C

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (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	50	100				46026

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 3EBI	2.2	50	46026	2466	100	0.16343	0.16136	0.20145	RANDOM	18.335

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			-0.03		0.01

RMS Deviations
Key	Refinement Restraint Deviation
r_dihedral_angle_2_deg	36.802
r_dihedral_angle_4_deg	20.37
r_dihedral_angle_3_deg	16.16
r_dihedral_angle_1_deg	7.112
r_scangle_it	6.733
r_scbond_it	4.138
r_mcangle_it	2.275
r_mcbond_it	1.202
r_angle_refined_deg	0.839
r_chiral_restr	0.075
r_bond_refined_d	0.005
r_gen_planes_refined	0.004

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	7288
Nucleic Acid Atoms
Solvent Atoms	438
Heterogen Atoms	14

Software

Software
Software Name	Purpose
HKL-3000	data collection
PHASER	phasing
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling