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Yorodumi- PDB-1c7s: BETA-N-ACETYLHEXOSAMINIDASE MUTANT D539A COMPLEXED WITH DI-N-ACET... -
+Open data
-Basic information
Entry | Database: PDB / ID: 1c7s | |||||||||
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Title | BETA-N-ACETYLHEXOSAMINIDASE MUTANT D539A COMPLEXED WITH DI-N-ACETYL-BETA-D-GLUCOSAMINE (CHITOBIASE) | |||||||||
Components | BETA-N-ACETYLHEXOSAMINIDASEHexosaminidase | |||||||||
Keywords | HYDROLASE / GLYCOSYL HYDROLASE / BETA-N-ACETYLHEXOSAMINIDASE / CHITINOLYSIS / A/B(TIM)-BARREL / SITE DIRECTED MUTAGENESIS / SUBSTRATE NUCLEOPHILE STABILIZER MUTATION | |||||||||
Function / homology | Function and homology information beta-N-acetylhexosaminidase / beta-N-acetylhexosaminidase activity / N-acetyl-beta-D-galactosaminidase activity / chitin catabolic process / polysaccharide binding / polysaccharide catabolic process / periplasmic space Similarity search - Function | |||||||||
Biological species | Serratia marcescens (bacteria) | |||||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.8 Å | |||||||||
Authors | Prag, G. / Papanikolau, Y. / Tavlas, G. / Vorgias, C.E. / Petratos, K. / Oppenheim, A.B. | |||||||||
Citation | Journal: J.Mol.Biol. / Year: 2000 Title: Structures of chitobiase mutants complexed with the substrate Di-N-acetyl-d-glucosamine: the catalytic role of the conserved acidic pair, aspartate 539 and glutamate 540. Authors: Prag, G. / Papanikolau, Y. / Tavlas, G. / Vorgias, C.E. / Petratos, K. / Oppenheim, A.B. #1: Journal: Nat.Struct.Biol. / Year: 1996 Title: Bacterial Chitobiase Structure Provides Insight Into Catalytic Mechanism and the Basis of Tay-Sachs Disease Authors: Tews, I. / Perrakis, A. / Oppenheim, A. / Dauter, Z. / Wilson, K.S. / Vorgias, C.E. | |||||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 1c7s.cif.gz | 203.4 KB | Display | PDBx/mmCIF format |
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PDB format | pdb1c7s.ent.gz | 155.9 KB | Display | PDB format |
PDBx/mmJSON format | 1c7s.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/c7/1c7s ftp://data.pdbj.org/pub/pdb/validation_reports/c7/1c7s | HTTPS FTP |
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-Related structure data
Related structure data | 1c7tC 1qbbS S: Starting model for refinement C: citing same article (ref.) |
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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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-Components
#1: Protein | Mass: 95940.930 Da / Num. of mol.: 1 Fragment: MATURE PROTEIN, PERIPLASMATIC TARGETING SEQUENCE RESIDUES 1-27 CLEAVED OFF DURING MATURATION Mutation: D539A Source method: isolated from a genetically manipulated source Details: COMPLEXED WITH DINAG / Source: (gene. exp.) Serratia marcescens (bacteria) / Strain: A9301 / Plasmid: PKK177-3 / Cellular location (production host): PERIPLASM / Production host: Escherichia coli (E. coli) / Strain (production host): XL1-BLUE / References: UniProt: Q54468, beta-N-acetylhexosaminidase | ||
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#2: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source | ||
#3: Chemical | ChemComp-SO4 / #4: Water | ChemComp-HOH / | |
-Experimental details
-Experiment
Experiment | Method: X-RAY DIFFRACTION / Number of used crystals: 1 |
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-Sample preparation
Crystal | Density Matthews: 2.56 Å3/Da / Density % sol: 51.9 % | |||||||||||||||||||||||||
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Crystal grow | Method: vapor diffusion, hanging drop / pH: 4.8 Details: CO-CRYSTALS WERE GROWN BY THE HANGING-DROP VAPOR DIFFUSION METHOD. RESERVOIR BUFFER CONTAINED 2.3 MOLAR AMMONIUM SULFATE AND 100 MILLIMOLAR CACODYLATE BUFFER PH 4.8. PROTEIN SOLUTION 40 ...Details: CO-CRYSTALS WERE GROWN BY THE HANGING-DROP VAPOR DIFFUSION METHOD. RESERVOIR BUFFER CONTAINED 2.3 MOLAR AMMONIUM SULFATE AND 100 MILLIMOLAR CACODYLATE BUFFER PH 4.8. PROTEIN SOLUTION 40 MILLIGRAM PER MILLILITER WAS MIXED WITH AN EQUAL VOLUME OF RESERVOIR CONTAINING 10 MILLIMOLAR DI-NAG. CRYSTALS ABOUT 0.5 X 0.2 X 0.2 MILLIMETER IN SIZE WERE FORMED WITHIN 2-3 DAYS., VAPOR DIFFUSION, HANGING DROP | |||||||||||||||||||||||||
Crystal grow | *PLUS | |||||||||||||||||||||||||
Components of the solutions | *PLUS
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-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: SYNCHROTRON / Site: EMBL/DESY, HAMBURG / Beamline: X11 / Wavelength: 0.9116 |
Detector | Type: MARRESEARCH / Detector: IMAGE PLATE / Date: Apr 4, 1999 / Details: 345 MM IMAGE PLATE |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.9116 Å / Relative weight: 1 |
Reflection | Resolution: 1.8→15 Å / Num. obs: 76047 / % possible obs: 96.9 % / Rmerge(I) obs: 0.024 / Net I/σ(I): 32832 |
Reflection shell | Resolution: 1.8→1.86 Å / Rmerge(I) obs: 0.095 / Mean I/σ(I) obs: 4738 / % possible all: 90.8 |
Reflection | *PLUS % possible obs: 86.9 % / Num. measured all: 937195 |
Reflection shell | *PLUS Lowest resolution: 1.95 Å / % possible obs: 90.8 % |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: PDB ENTRY 1QBB Resolution: 1.8→15 Å / SU B: 2.724 / SU ML: 0.087 / Cross valid method: R-FREE / σ(F): 0 / ESU R: 0.152 / ESU R Free: 0.147
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Displacement parameters | Biso mean: 21.8 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 1.8→15 Å
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Refine LS restraints |
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Software | *PLUS Name: 'REFMAC / ARP' / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement | *PLUS σ(F): 0 / % reflection Rfree: 5 % | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Solvent computation | *PLUS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | *PLUS Biso mean: 21.8 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints | *PLUS
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