2CHB

CHOLERA TOXIN B-PENTAMER COMPLEXED WITH GM1 PENTASACCHARIDE


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1CHBPDB ENTRY 1CHB

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
17.5200 MM MGCL2 100 MM CACODYLATE 5% PEG 1000 PH 7.5
Crystal Properties
Matthews coefficientSolvent content
2.2746

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 101.9α = 90
b = 67.58β = 105.69
c = 80.47γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray287AREA DETECTORSIEMENS1993-02-22M
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1ROTATING ANODERIGAKU RUH2R

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12101000.06535318
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
22.25990.246

Refinement

Statistics
Diffraction IDStructure Solution MethodStarting modelResolution (High)Resolution (Low)Cut-off Sigma (F)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (Observed)R-WorkR-FreeMean Isotropic B
X-RAY DIFFRACTIONPDB ENTRY 1CHB21012882881.40.1710.17122
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]
-8.01-3.972.575.44
RMS Deviations
KeyRefinement Restraint Deviation
x_mcangle_it4.3
x_scangle_it4.3
x_mcbond_it2.7
x_scbond_it2.7
x_angle_deg1.73
x_bond_d0.012
x_bond_d_na
x_bond_d_prot
x_angle_d
x_angle_d_na
RMS Deviations
KeyRefinement Restraint Deviation
x_mcangle_it4.3
x_scangle_it4.3
x_mcbond_it2.7
x_scbond_it2.7
x_angle_deg1.73
x_bond_d0.012
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
x_dihedral_angle_d_na
x_dihedral_angle_d_prot
x_improper_angle_d
x_improper_angle_d_na
x_improper_angle_d_prot
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms4070
Nucleic Acid Atoms
Solvent Atoms388
Heterogen Atoms316

Software

Software
Software NamePurpose
XENGENdata collection
MACROdata reduction
X-PLORmodel building
X-PLORrefinement
XENGENdata reduction
MACROdata scaling
X-PLORphasing