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Yorodumi- PDB-1sl7: Crystal structure of calcium-loaded apo-obelin from Obelia longissima -
+Open data
-Basic information
Entry | Database: PDB / ID: 1sl7 | ||||||
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Title | Crystal structure of calcium-loaded apo-obelin from Obelia longissima | ||||||
Components | Obelin | ||||||
Keywords | LUMINESCENT PROTEIN / Photoprotein / obelin / bioluminescence / calcium binding / EF-hand / aequorin / fluorescence / Structural Genomics / PSI / Protein Structure Initiative / Southeast Collaboratory for Structural Genomics / SECSG | ||||||
Function / homology | Function and homology information | ||||||
Biological species | Obelia longissima (invertebrata) | ||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.2 Å | ||||||
Authors | Deng, L. / Markova, S.V. / Vysotski, E.S. / Liu, Z.J. / Lee, J. / Rose, J. / Wang, B.C. / Southeast Collaboratory for Structural Genomics (SECSG) | ||||||
Citation | Journal: Protein Sci. / Year: 2005 Title: All three Ca2+-binding loops of photoproteins bind calcium ions: The crystal structures of calcium-loaded apo-aequorin and apo-obelin. Authors: Deng, L. / Vysotski, E.S. / Markova, S.V. / Liu, Z.J. / Lee, J. / Rose, J. / Wang, B.C. #1: Journal: Protein Sci. / Year: 2000 Title: Structure of the Ca2+-regulated photoprotein obelin at 1.7 resolution determined directly from its sulfur substructure Authors: Liu, Z.-J. / Vysotski, E.S. / Chen, C.-J. / Rose, J. / Lee, J. / Wang, B.-C. #2: Journal: Acta Crystallogr.,Sect.D / Year: 1999 Title: Preparation and preliminary study of crystals of the recombinant calcium-regulated photoprotein obelin from the bioluminescent hydroid Obelia longissima Authors: Vysotski, E.S. / Liu, Z.-J. / Rose, J. / Wang, B.-C. / Lee, J. #3: Journal: FEBS Lett. / Year: 2001 Title: Structural basis for the emission of violet bioluminescence from a W92F obelin mutant Authors: Deng, L. / Vysotski, E.S. / Liu, Z.-J. / Markova, S.V. / Malikova, N.P. / Lee, J. / Rose, J. / Wang, B.-C. #4: Journal: Biochemistry / Year: 2003 Title: Violet Bioluminescence and Fast Kinetics from W92F Obelin: Structure-Based Proposals for the Bioluminescence Triggering and the Identification of the Emitting Species Authors: Vysotski, E.S. / Liu, Z.-J. / Markova, S.V. / Blinks, J. / Deng, L. / Frank, L.A. / Herko, M. / Malikova, N.P. / Rose, J.P. / Wang, B.-C. / Lee, J. #5: Journal: Biochem.Biophys.Res.Commun. / Year: 2003 Title: Atomic resolution structure of obelin: Soaking with calcium enhances electron density of the second oxygen atom substituted at the C2-position of coelenterazine Authors: Liu, Z.-J. / Vysotski, E.S. / Deng, L. / Lee, J. / Rose, J. / Wang, B.-C. #6: Journal: To be Published Title: Preparation and X-ray Crystallographic Analysis of the Ca2+-discharged Photoprotein Obelin Authors: Deng, L. / Markova, S.V. / Vysotski, E.S. / Liu, Z.-J. / Lee, J. / Rose, J. / Wang, B.-C. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 1sl7.cif.gz | 53.9 KB | Display | PDBx/mmCIF format |
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PDB format | pdb1sl7.ent.gz | 37.5 KB | Display | PDB format |
PDBx/mmJSON format | 1sl7.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/sl/1sl7 ftp://data.pdbj.org/pub/pdb/validation_reports/sl/1sl7 | HTTPS FTP |
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-Related structure data
Related structure data | 1sl8C 1jf2S S: Starting model for refinement C: citing same article (ref.) |
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Similar structure data | |
Other databases |
-Links
-Assembly
Deposited unit |
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1 |
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Unit cell |
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-Components
#1: Protein | Mass: 22255.891 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Obelia longissima (invertebrata) / Plasmid: pET19b+ / Production host: Escherichia coli (E. coli) / Strain (production host): BL21-Gold(DE3) / References: UniProt: Q27709 | ||
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#2: Chemical | #3: 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: 2.13 Å3/Da / Density % sol: 42.3 % |
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Crystal grow | Temperature: 277 K / Method: modified microbatch / pH: 7.5 Details: 20% w/v polyethylene glycol 10000, 0.1M HEPES, pH 7.5, modified microbatch, temperature 277K |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: SYNCHROTRON / Site: APS / Beamline: 22-ID / Wavelength: 0.97 Å |
Detector | Type: MAR CCD 165 mm / Detector: CCD / Date: Mar 20, 2003 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.97 Å / Relative weight: 1 |
Reflection | Resolution: 2.2→50 Å / Num. obs: 18694 / Observed criterion σ(I): -3 / Redundancy: 5.9 % / Rmerge(I) obs: 0.074 / Net I/σ(I): 20.4 |
Reflection shell | Resolution: 2.2→2.28 Å / Rmerge(I) obs: 0.251 / Mean I/σ(I) obs: 4.7 / % possible all: 99.4 |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: PDB ENTRY 1JF2 Resolution: 2.2→51.99 Å / Cor.coef. Fo:Fc: 0.946 / Cor.coef. Fo:Fc free: 0.921 / SU B: 5.721 / SU ML: 0.149 / Cross valid method: THROUGHOUT / ESU R: 0.265 / ESU R Free: 0.211 / Stereochemistry target values: MAXIMUM LIKELIHOOD Details: There is a block of density in the vicinity of Trp 179, Trp 114 and HOH 1, indicating that a small solvent molecule is present. The authors believe that, based on their crystallization set ...Details: There is a block of density in the vicinity of Trp 179, Trp 114 and HOH 1, indicating that a small solvent molecule is present. The authors believe that, based on their crystallization set up, it is most likely Tris. However, it cannot be unambiguously modeled given the resolution of 2.2 A.
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Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.4 Å / Solvent model: BABINET MODEL WITH MASK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 27.934 Å2
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Refinement step | Cycle: LAST / Resolution: 2.2→51.99 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 2.2→2.256 Å / Total num. of bins used: 20 /
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