Experiment: 7VT9

CRYSTAL STRUCTURE AT 3.4 ANGSTROMS RESOLUTION OF Maltodextrin glucosidase, MalZ, FROM Escherichia coli

X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
Type	Source	Accession Code	Details
experimental model	PDB	2D0G

Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, SITTING DROP	7	291	20% polyacrylic acid 5100, 100 mM HEPES/Sodium hydroxide pH 7.0 and 20 mM Magnesium chloride

Crystal Properties
Matthews coefficient	Solvent content
5.05	75.64

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 204.186	α = 90
b = 204.186	β = 90
c = 267.916	γ = 90

Symmetry
Space Group	I 41 2 2

Diffraction

Diffraction Experiment
ID #	Crystal ID	Scattering Type	Data Collection Temperature	Detector	Detector Type	Details	Collection Date	Monochromator	Protocol
1	1	x-ray	195	CCD	ADSC QUANTUM 270		2013-10-02	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	SYNCHROTRON	PAL/PLS BEAMLINE 7A (6B, 6C1)	1	PAL/PLS	7A (6B, 6C1)

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	3.3	40.91	99.9	0.355	4.02	25.4		43678			80.22

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	3.3	3.418	99.2		0.001		14.6

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 (Depositor)	R-Work (DCC)	R-Free (Depositor)	R-Free (DCC)	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	FREE R-VALUE	2D0G	3.3	40.91	1.33	42002	1960	98.04	0.3051	0.3032	0.3021	0.3431	0.3404	120.69

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
f_dihedral_angle_d	6.0103
f_angle_d	1.829
f_chiral_restr	0.0939
f_bond_d	0.0146
f_plane_restr	0.0126

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	9762
Nucleic Acid Atoms
Solvent Atoms	1
Heterogen Atoms

Software

Software
Software Name	Purpose
PHENIX	refinement
Blu-Ice	data collection
HKL-2000	data scaling
PHASER	phasing
Coot	model building
HKL-2000	data reduction