1XGS

METHIONINE AMINOPEPTIDASE FROM HYPERTHERMOPHILE PYROCOCCUS FURIOSUS

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		8.5		PROTEIN SOLUTION CONTAINING 16 MG/ML PFMAP, 2 MM COCL2 AND 30 MM L-METHIONINE IN 20 MM POTASSIUM ACETATE AT PH4.5 WAS MIXED WITH EQUAL AMOUNT OF RESERVOIR SOLUTION CONTAINING 20% ETHANOL IN 0.1 M TRIS BUFFER AT PH 8.5, THEN EQUILIBRATED AGAINST RESERVOIR SOLUTION. OBTAINED CRYSTALS WERE TRANSFORMED TO LOW-HUMIDITY FORM BY CONTROLLING THE RELATIVE HUMIDITY USING THE SATURATED SALT SOLUTIONS (AMMONIUM SULFATE AT LAST STAGE).

Crystal Properties
Matthews coefficient	Solvent content
2.22	44.9

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 51.903	α = 90
b = 83.286	β = 105.87
c = 70.267	γ = 90

Symmetry
Space Group	P 1 21 1

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	289	IMAGE PLATE	MAC Science DIP-2030	MIRRORS	1996-12-26	M

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

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	1.75	100	84.6	0.075	9.7	3.9		49955		1

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)
	1.75	1.81	62.4		0.361	1.6

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Cut-off Sigma (F)	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	RIGID-BODY REFINEMENT	THROUGHOUT	STRUCTURE OF NATIVE MONOCLINIC PFMAP CRYSTAL DETERMINED BY MIR METHOD	1.75	15	2	45327	4521	78.3	0.187	0.187	0.235	RANDOM	20

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]

RMS Deviations
Key	Refinement Restraint Deviation
x_dihedral_angle_d	24.32
x_angle_deg	1.61
x_improper_angle_d	1.43
x_bond_d	0.011
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
x_angle_d_prot
x_angle_deg_na
x_angle_deg_prot
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d_na
x_improper_angle_d_prot
x_mcbond_it
x_mcangle_it
x_scbond_it
x_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	4624
Nucleic Acid Atoms
Solvent Atoms	206
Heterogen Atoms	4

Software

Software
Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	phasing