+Open data
-Basic information
Entry | Database: PDB / ID: 1lt4 | |||||||||
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Title | HEAT-LABILE ENTEROTOXIN MUTANT S63K | |||||||||
Components | (HEAT-LABILE ENTEROTOXIN) x 2 | |||||||||
Keywords | ENTEROTOXIN | |||||||||
Function / homology | Function and homology information : / toxin activity / killing of cells of another organism / extracellular space / extracellular region Similarity search - Function | |||||||||
Biological species | Escherichia coli (E. coli) | |||||||||
Method | X-RAY DIFFRACTION / ISOMORPHOUS MOLECULAR REPLACEMENT / Resolution: 2 Å | |||||||||
Authors | Van Den Akker, F. / Hol, W.G.J. | |||||||||
Citation | Journal: Protein Sci. / Year: 1997 Title: Crystal structure of a non-toxic mutant of heat-labile enterotoxin, which is a potent mucosal adjuvant. Authors: van den Akker, F. / Pizza, M. / Rappuoli, R. / Hol, W.G. #1: Journal: Mol.Microbiol. / Year: 1994 Title: Probing the Structure-Activity Relationship of Escherichia Coli Lt-A by Site-Directed Mutagenesis Authors: Pizza, M. / Domenighini, M. / Hol, W. / Giannelli, V. / Fontana, M.R. / Giuliani, M.M. / Magagnoli, C. / Peppoloni, S. / Manetti, R. / Rappuoli, R. #2: Journal: J.Mol.Biol. / Year: 1993 Title: Refined Structure of Escherichia Coli Heat-Labile Enterotoxin, a Close Relative of Cholera Toxin Authors: Sixma, T.K. / Kalk, K.H. / Van Zanten, B.A. / Dauter, Z. / Kingma, J. / Witholt, B. / Hol, W.G. #3: Journal: Nature / Year: 1991 Title: Crystal Structure of a Cholera Toxin-Related Heat-Labile Enterotoxin from E. Coli Authors: Sixma, T.K. / Pronk, S.E. / Kalk, K.H. / Wartna, E.S. / Van Zanten, B.A. / Witholt, B. / Hol, W.G. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 1lt4.cif.gz | 164.4 KB | Display | PDBx/mmCIF format |
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PDB format | pdb1lt4.ent.gz | 133.7 KB | Display | PDB format |
PDBx/mmJSON format | 1lt4.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 1lt4_validation.pdf.gz | 1.8 MB | Display | wwPDB validaton report |
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Full document | 1lt4_full_validation.pdf.gz | 1.8 MB | Display | |
Data in XML | 1lt4_validation.xml.gz | 32.4 KB | Display | |
Data in CIF | 1lt4_validation.cif.gz | 46.5 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/lt/1lt4 ftp://data.pdbj.org/pub/pdb/validation_reports/lt/1lt4 | HTTPS FTP |
-Related structure data
Related structure data | 1lttS S: Starting model for refinement |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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Unit cell |
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Details | THE ASYMMETRIC UNIT CONTAINS ONE AB5 TOXIN HEXAMER. THE A SUBUNIT CONTAINS TWO FRAGMENTS LINKED BY A DISORDERED LOOP. THESE 2 FRAGMENTS ARE CONVENTIONALLY REFERRED TO AS A1 AND A2. FRAGMENTS A1 AND A2 ARE COVALENTLY LINKED IN THE LATENT TOXIN AND ARE PROTEOLYTICALLY CLEAVED UPON ACTIVATION. |
-Components
#1: Protein | Mass: 11807.539 Da / Num. of mol.: 5 / Fragment: HOLOTOXIN / Mutation: CHAIN A, S63K Source method: isolated from a genetically manipulated source Details: LACTOSE / Source: (gene. exp.) Escherichia coli (E. coli) / Strain: PORCINE / Production host: Escherichia coli (E. coli) / References: UniProt: P32890 #2: Protein | | Mass: 28654.523 Da / Num. of mol.: 1 / Fragment: HOLOTOXIN / Mutation: CHAIN A, S63K Source method: isolated from a genetically manipulated source Details: LACTOSE / Source: (gene. exp.) Escherichia coli (E. coli) / Strain: PORCINE / Production host: Escherichia coli (E. coli) / References: UniProt: P06717, UniProt: Q2HQJ7*PLUS #3: Polysaccharide | beta-D-galactopyranose-(1-4)-beta-D-glucopyranose / beta-lactose #4: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
Experiment | Method: X-RAY DIFFRACTION / Number of used crystals: 1 |
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-Sample preparation
Crystal | Density Matthews: 2.24 Å3/Da / Density % sol: 45.19 % Description: NO MOLECULAR REPLACEMENT SEARCH NEEDED TO BE PERFORMED BECAUSE THE SPACE GROUP AND CELL DIMENSIONS WERE IDENTICAL TO THE STARTING 1LTT STRUCTURE. | ||||||||||||||||||||||||||||||||||||||||||
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Crystal grow | Method: 3 layer capillary method / pH: 7.5 Details: PROTEIN WAS CRYSTALLIZED FROM 5% PEG 6000, 100 MM NACL, 1 MM EDTA, 75 MM LACTOSE, 100 MM TRIS PH 7.5 USING THE 3 LAYER CAPPILARY METHOD, 3 layer capillary method | ||||||||||||||||||||||||||||||||||||||||||
Crystal grow | *PLUS Method: three-layer capillary | ||||||||||||||||||||||||||||||||||||||||||
Components of the solutions | *PLUS
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-Data collection
Diffraction | Mean temperature: 295 K |
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Diffraction source | Source: ROTATING ANODE / Type: RIGAKU RUH2R / Wavelength: 1.5418 |
Detector | Type: RIGAKU / Detector: IMAGE PLATE / Date: Feb 1, 1997 / Details: MIRRORS |
Radiation | Monochromator: NI FILTER / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1.5418 Å / Relative weight: 1 |
Reflection | Resolution: 2→100 Å / Num. obs: 50516 / % possible obs: 93.3 % / Observed criterion σ(I): 1 / Redundancy: 3.2 % / Rsym value: 0.064 / Net I/σ(I): 18 |
Reflection shell | Resolution: 2→2.07 Å / Mean I/σ(I) obs: 5.1 / Rsym value: 0.156 / % possible all: 80 |
Reflection | *PLUS Rmerge(I) obs: 0.063 |
Reflection shell | *PLUS % possible obs: 81.4 % / Rmerge(I) obs: 0.156 |
-Processing
Software |
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Refinement | Method to determine structure: ISOMORPHOUS MOLECULAR REPLACEMENT Starting model: PDB ENTRY 1LTT Resolution: 2→10 Å / Cross valid method: THROUGHOUT / σ(F): 2 Details: RESIDUES A 1 - A 3, A 189 - A 195, AND A 237 - A 240 ARE OMITTED FROM THE STRUCTURE BECAUSE OF POOR ELECTRON DENSITY.
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Displacement parameters | Biso mean: 24.9 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2→10 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 2→2.07 Å / Total num. of bins used: 10
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Xplor file |
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Software | *PLUS Name: X-PLOR / Version: 3.1 / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints | *PLUS
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