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- PDB-4khz: Crystal structure of the maltose-binding protein/maltose transpor... -
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Open data
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Basic information
Entry | Database: PDB / ID: 4khz | |||||||||
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Title | Crystal structure of the maltose-binding protein/maltose transporter complex in an pre-translocation conformation bound to maltoheptaose | |||||||||
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Function / homology | ![]() ABC-type maltose transporter activity / negative regulation of maltose transport / enzyme IIA-maltose transporter complex / negative regulation of transmembrane transport / detection of maltose stimulus / maltose transport complex / ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
Biological species | ![]() ![]() ![]() | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Oldham, M.L. / Chen, S. / Chen, J. | |||||||||
![]() | ![]() Title: Structural basis for substrate specificity in the Escherichia coli maltose transport system. Authors: Oldham, M.L. / Chen, S. / Chen, J. | |||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 749.6 KB | Display | ![]() |
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PDB format | ![]() | 626.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
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Links
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Assembly
Deposited unit | ![]()
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1 |
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Unit cell |
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Details | Biological assembly is composed of chains A,B,E,F, and G |
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Components
-Protein , 2 types, 2 molecules EF
#1: Protein | Mass: 41898.336 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
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#2: Protein | Mass: 57052.898 Da / Num. of mol.: 1 / Fragment: UNP residues 27-396 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
-Binding-protein-dependent transport systems inner membrane ... , 2 types, 3 molecules GAB
#3: Protein | Mass: 32246.227 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
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#4: Protein | Mass: 42184.535 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() ![]() ![]() |
-Sugars , 2 types, 2 molecules
#5: Polysaccharide | alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose / alpha-maltotetraose |
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#6: Polysaccharide | alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose / alpha-maltotriose |
-Non-polymers , 2 types, 54 molecules ![](data/chem/img/PGV.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/HOH.gif)
#7: Chemical | ChemComp-PGV / (![]() |
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#8: Water | ChemComp-HOH / ![]() |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 3.65 Å3/Da / Density % sol: 66.31 % |
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Crystal grow![]() | Temperature: 295 K / Method: vapor diffusion, sitting drop / pH: 7.5 Details: 30% poly-ethylene glycol 400, 100 mM NaCl, 10 mM MgCl2, 100 mM sodium HEPES pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 295K |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: MARMOSAIC 300 mm CCD / Detector: CCD / Date: Oct 15, 2011 / Details: mirrors |
Radiation | Monochromator: double crystal monochromator / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength![]() |
Reflection | Resolution: 2.9→20 Å / Num. all: 52859 / Num. obs: 52859 / % possible obs: 77.1 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 |
Reflection shell | Resolution: 2.9→3 Å / % possible all: 30.9 |
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Processing
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Refinement | Method to determine structure![]() ![]()
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 97.709 Å2
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Refinement step | Cycle: LAST / Resolution: 2.9→19.81 Å
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Refine LS restraints |
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