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Yorodumi- PDB-5ur2: Crystal structure of proline utilization A (PutA) from Bdellovibr... -
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-Basic information
Entry | Database: PDB / ID: 5ur2 | ||||||
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Title | Crystal structure of proline utilization A (PutA) from Bdellovibrio bacteriovorus inactivated by N-propargylglycine | ||||||
Components | Bifunctional protein PutA | ||||||
Keywords | OXIDOREDUCTASE / FLAVOENZYME / ROSSMANN FOLD / ALDEHYDE DEHYDROGENASE / FLAVIN ADENINE DINUCLEOTIDE / NICOTINAMIDE ADENINE DINUCLEOTIDE / PROLINE CATABOLISM / SUBSTRATE CHANNELING / BIFUNCTIONAL ENZYME / MECHANISM-BASED INACTIVATION | ||||||
Function / homology | Function and homology information proline dehydrogenase activity / L-glutamate gamma-semialdehyde dehydrogenase / 1-pyrroline-5-carboxylate dehydrogenase activity / proline catabolic process to glutamate / DNA-binding transcription factor activity Similarity search - Function | ||||||
Biological species | Bdellovibrio bacteriovorus (bacteria) | ||||||
Method | X-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.23 Å | ||||||
Authors | Tanner, J.J. | ||||||
Funding support | United States, 1items
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Citation | Journal: FEBS J / Year: 2017 Title: Biophysical investigation of type A PutAs reveals a conserved core oligomeric structure. Authors: David A Korasick / Harkewal Singh / Travis A Pemberton / Min Luo / Richa Dhatwalia / John J Tanner / Abstract: Many enzymes form homooligomers, yet the functional significance of self-association is seldom obvious. Herein, we examine the connection between oligomerization and catalytic function for proline ...Many enzymes form homooligomers, yet the functional significance of self-association is seldom obvious. Herein, we examine the connection between oligomerization and catalytic function for proline utilization A (PutA) enzymes. PutAs are bifunctional enzymes that catalyze both reactions of proline catabolism. Type A PutAs are the smallest members of the family, possessing a minimal domain architecture consisting of N-terminal proline dehydrogenase and C-terminal l-glutamate-γ-semialdehyde dehydrogenase modules. Type A PutAs form domain-swapped dimers, and in one case (Bradyrhizobium japonicum PutA), two of the dimers assemble into a ring-shaped tetramer. Whereas the dimer has a clear role in substrate channeling, the functional significance of the tetramer is unknown. To address this question, we performed structural studies of four-type A PutAs from two clades of the PutA tree. The crystal structure of Bdellovibrio bacteriovorus PutA covalently inactivated by N-propargylglycine revealed a fold and substrate-channeling tunnel similar to other PutAs. Small-angle X-ray scattering (SAXS) and analytical ultracentrifugation indicated that Bdellovibrio PutA is dimeric in solution, in contrast to the prediction from crystal packing of a stable tetrameric assembly. SAXS studies of two other type A PutAs from separate clades also suggested that the dimer predominates in solution. To assess whether the tetramer of B. japonicum PutA is necessary for catalytic function, a hot spot disruption mutant that cleanly produces dimeric protein was generated. The dimeric variant exhibited kinetic parameters similar to the wild-type enzyme. These results implicate the domain-swapped dimer as the core structural and functional unit of type A PutAs. ENZYMES: Proline dehydrogenase (EC 1.5.5.2); l-glutamate-γ-semialdehyde dehydrogenase (EC 1.2.1.88). DATABASES: The atomic coordinates and structure factor amplitudes have been deposited in the Protein Data Bank under accession number 5UR2. The SAXS data have been deposited in the SASBDB under the ...DATABASES: The atomic coordinates and structure factor amplitudes have been deposited in the Protein Data Bank under accession number 5UR2. The SAXS data have been deposited in the SASBDB under the following accession codes: SASDCP3 (BbPutA), SASDCQ3 (DvPutA 1.5 mg·mL ), SASDCX3 (DvPutA 3.0 mg·mL ), SASDCY3 (DvPutA 4.5 mg·mL ), SASDCR3 (LpPutA 3.0 mg·mL ), SASDCV3 (LpPutA 5.0 mg·mL ), SASDCW3 (LpPutA 8.0 mg·mL ), SASDCS3 (BjPutA 2.3 mg·mL ), SASDCT3 (BjPutA 4.7 mg·mL ), SASDCU3 (BjPutA 7.0 mg·mL ), SASDCZ3 (R51E 2.3 mg·mL ), SASDC24 (R51E 4.7 mg·mL ), SASDC34 (R51E 7.0 mg·mL ). | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 5ur2.cif.gz | 1.4 MB | Display | PDBx/mmCIF format |
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PDB format | pdb5ur2.ent.gz | 1.2 MB | Display | PDB format |
PDBx/mmJSON format | 5ur2.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 5ur2_validation.pdf.gz | 1.6 MB | Display | wwPDB validaton report |
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Full document | 5ur2_full_validation.pdf.gz | 1.6 MB | Display | |
Data in XML | 5ur2_validation.xml.gz | 129.5 KB | Display | |
Data in CIF | 5ur2_validation.cif.gz | 182.3 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ur/5ur2 ftp://data.pdbj.org/pub/pdb/validation_reports/ur/5ur2 | HTTPS FTP |
-Related structure data
Related structure data | 4nmeS 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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Unit cell |
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments:
NCS ensembles :
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-Components
#1: Protein | Mass: 109638.047 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Bdellovibrio bacteriovorus (strain ATCC 15356 / DSM 50701 / NCIB 9529 / HD100) (bacteria) Strain: ATCC 15356 / DSM 50701 / NCIB 9529 / HD100 / Gene: putA, Bd1251 / Production host: Escherichia coli (E. coli) / References: UniProt: Q6MNK1 #2: Chemical | ChemComp-P5F / #3: Water | ChemComp-HOH / | Has protein modification | Y | |
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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: 2.89 Å3/Da / Density % sol: 57.39 % |
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Crystal grow | Temperature: 293 K / Method: microbatch / pH: 7.5 / Details: 19% PEG 3350, 0.25M KSCN |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: SYNCHROTRON / Site: APS / Beamline: 24-ID-E / Wavelength: 0.9792 Å |
Detector | Type: ADSC QUANTUM 315r / Detector: CCD / Date: Jul 1, 2012 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.9792 Å / Relative weight: 1 |
Reflection | Resolution: 2.228→128.909 Å / Num. obs: 241211 / % possible obs: 97.9 % / Redundancy: 3.9 % / Biso Wilson estimate: 27.58 Å2 / Rsym value: 0.095 / Net I/σ(I): 10 |
Reflection shell | Resolution: 2.23→2.35 Å / Redundancy: 3.9 % / Rmerge(I) obs: 0.493 / Mean I/σ(I) obs: 1.6 / Rsym value: 0.493 / % possible all: 98.3 |
-Processing
Software |
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Refinement | Method to determine structure: MOLECULAR REPLACEMENT Starting model: 4NME Resolution: 2.23→128.91 Å / SU ML: 0.27 / Cross valid method: FREE R-VALUE / σ(F): 0 / Phase error: 22.43 / Stereochemistry target values: ML
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Solvent computation | Shrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 31.34 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 2.23→128.91 Å
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Refine LS restraints |
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Refine LS restraints NCS |
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LS refinement shell |
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group |
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