2E2A

ASP81LEU ENZYME IIA FROM THE LACTOSE SPECIFIC PTS FROM LACTOCOCCUS LACTIS

X-RAY DIFFRACTION

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Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	1E2A

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1		6.5		THE PROTEIN WAS CRYSTALLIZED FROM 0.9M NA ACETATE AND 0.1M NA CACODYLATE AT PH 6.5. HANGING-DROP METHOD WAS USED. THE INITIAL CONCENTRATION OF THE PROTEIN IN THE DROP WAS 5 MG/ML.

Crystal Properties
Matthews coefficient	Solvent content
2.25	44.56

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 87.96	α = 90
b = 87.96	β = 90
c = 79.84	γ = 90

Symmetry
Space Group	P 41 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	ADSC QUANTUM 4		1998-03-30	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	NSLS BEAMLINE X12B		NSLS	X12B

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	2.1	36	99.5	0.037	13.7	4.8		18726			30.6

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)
	2.1	2.2	99.9		0.271	2.7	4.2

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-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	OTHER	THROUGHOUT	1E2A	2.1	20	18682	1836	99.2	0.198	0.249	RANDOM	45.9

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]
2.58			2.58		-5.16

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	16.3
c_scangle_it	6.32
c_scbond_it	4.62
c_mcangle_it	3.73
c_mcbond_it	2.83
c_angle_deg	1.5
c_improper_angle_d	1.15
c_bond_d	0.176
c_bond_d_na
c_bond_d_prot
c_angle_d
c_angle_d_na
c_angle_d_prot
c_angle_deg_na
c_angle_deg_prot
c_dihedral_angle_d_na
c_dihedral_angle_d_prot
c_improper_angle_d_na
c_improper_angle_d_prot

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2335
Nucleic Acid Atoms
Solvent Atoms	173
Heterogen Atoms

Software

Software
Software Name	Purpose
MOSFLM	data reduction
CNS	refinement
CNS	phasing