1Z18

Crystal structure analysis of periplasmic Leu/Ile/Val-binding protein with bound valine

X-RAY DIFFRACTION

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Crystallization

Crystalization Experiments
ID	Method	pH	Temperature	Details
1	VAPOR DIFFUSION, HANGING DROP	5.5	293	25% (v/v) PEG-400, 0.1 M succinic acid, 50 mM CdSo4 and 50 mM Na-cacodylate, pH 5.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

Crystal Properties
Matthews coefficient	Solvent content
2.28	45

Crystal Data

Unit Cell
Length ( Å )	Angle ( ˚ )
a = 58.42	α = 90
b = 70.34	β = 90
c = 82.9	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	IMAGE PLATE	MACSCIENCE	Graphite monochromator	1998-04-05	M	SINGLE WAVELENGTH

Radiation Source
ID #	Source	Type	Wavelength List	Synchrotron Site	Beamline
1	ROTATING ANODE	RIGAKU RU200	1.5418

Data Collection

Overall
ID #	Resolution (High)	Resolution (Low)	Percent Possible (Observed)	R Merge I (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	50	92	0.129	0.129	5.4	3	45340	18896	1	1	0.5

Highest Resolution Shell
ID #	Resolution (High)	Resolution (Low)	Percent Possible (All)	Percent Possible (Observed)	R Merge I (Observed)	R-Sym I (Observed)	Mean I Over Sigma (Observed)	Redundancy	Number Unique Reflections (All)
1	2.1	2.2	85		0.242	0.242	2.2	2	18896

Refinement

Statistics
Diffraction ID	Structure Solution Method	Cross Validation method	Starting model	Resolution (High)	Resolution (Low)	Number Reflections (All)	Number Reflections (Observed)	Number Reflections (R-Free)	Percent Reflections (Observed)	R-Work	R-Free	R-Free Selection Details	Mean Isotropic B
X-RAY DIFFRACTION	MOLECULAR REPLACEMENT	THROUGHOUT	liv-leu complex without bound leu and solvent, pdb entry 1Z16	2.1	29.21	18896	18896	919	92	0.216	0.262	RANDOM	13.3

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]
1.85			-3.83		1.97

RMS Deviations
Key	Refinement Restraint Deviation
c_dihedral_angle_d	23.5
c_angle_deg	1.6
c_improper_angle_d	1.04
c_bond_d	0.011
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
c_mcbond_it
c_mcangle_it
c_scbond_it
c_scangle_it

Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen Atoms	Number
Protein Atoms	2591
Nucleic Acid Atoms
Solvent Atoms	195
Heterogen Atoms	11

Software

Software
Software Name	Purpose
CNS	refinement
MACSCIENCE	data reduction
DENZO	data reduction
SCALEPACK	data scaling
EPMR	phasing
GEHLHAAR)	phasing