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Yorodumi- PDB-9eq5: CryoEM Structure of Phenylalanine Ammonia Lyase from Planctomyces... -
+Open data
-Basic information
Entry | Database: PDB / ID: 9eq5 | ||||||
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Title | CryoEM Structure of Phenylalanine Ammonia Lyase from Planctomyces brasiliencis | ||||||
Components | Histidine ammonia-lyase | ||||||
Keywords | LYASE / Phenylalanine catabolism Lyase | ||||||
Function / homology | Function and homology information histidine ammonia-lyase / histidine ammonia-lyase activity / phenylalanine ammonia-lyase activity / secondary metabolite biosynthetic process Similarity search - Function | ||||||
Biological species | Rubinisphaera brasiliensis (bacteria) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.17 Å | ||||||
Authors | Duhoo, Y. / Buslov, I. / Desmons, S. | ||||||
Funding support | Switzerland, 1items
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Citation | Journal: Angew Chem Int Ed Engl / Year: 2024 Title: Engineered Phenylalanine Ammonia-Lyases for the Enantioselective Synthesis of Aspartic Acid Derivatives. Authors: Ivan Buslov / Sarah Desmons / Yoan Duhoo / Xile Hu / Abstract: Biocatalytic hydroamination of alkenes is an efficient and selective method to synthesize natural and unnatural amino acids. Phenylalanine ammonia-lyases (PALs) have been previously engineered to ...Biocatalytic hydroamination of alkenes is an efficient and selective method to synthesize natural and unnatural amino acids. Phenylalanine ammonia-lyases (PALs) have been previously engineered to access a range of substituted phenylalanines and heteroarylalanines, but their substrate scope remains limited, typically including only arylacrylic acids. Moreover, the enantioselectivity in the hydroamination of electron-deficient substrates is often poor. Here, we report the structure-based engineering of PAL from Planctomyces brasiliensis (PbPAL), enabling preparative-scale enantioselective hydroaminations of previously inaccessible yet synthetically useful substrates, such as amide- and ester-containing fumaric acid derivatives. Through the elucidation of cryo-electron microscopy (cryo-EM) PbPAL structure and screening of the structure-based mutagenesis library, we identified the key active site residue L205 as pivotal for dramatically enhancing the enantioselectivity of hydroamination reactions involving electron-deficient substrates. Our engineered PALs demonstrated exclusive α-regioselectivity, high enantioselectivity, and broad substrate scope. The potential utility of the developed biocatalysts was further demonstrated by a preparative-scale hydroamination yielding tert-butyl protected l-aspartic acid, widely used as intermediate in peptide solid-phase synthesis. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 9eq5.cif.gz | 389.2 KB | Display | PDBx/mmCIF format |
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PDB format | pdb9eq5.ent.gz | 315.2 KB | Display | PDB format |
PDBx/mmJSON format | 9eq5.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 9eq5_validation.pdf.gz | 1.6 MB | Display | wwPDB validaton report |
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Full document | 9eq5_full_validation.pdf.gz | 1.6 MB | Display | |
Data in XML | 9eq5_validation.xml.gz | 64.7 KB | Display | |
Data in CIF | 9eq5_validation.cif.gz | 96.5 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/eq/9eq5 ftp://data.pdbj.org/pub/pdb/validation_reports/eq/9eq5 | HTTPS FTP |
-Related structure data
Related structure data | 19897MC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 62710.332 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Details: MDO: non standard Amino acid ALA-SER-GLY / Source: (gene. exp.) Rubinisphaera brasiliensis (bacteria) / Gene: Plabr_3153 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: F0SIS6, histidine ammonia-lyase #2: Chemical | ChemComp-PPH / [( Has ligand of interest | Y | Has protein modification | Y | |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: Phenylalanine ammonia-lyase protein in complex with (1R)-1-amino-2-phenylethyl]phosphonic acid Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT | |||||||||||||||
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Molecular weight | Experimental value: NO | |||||||||||||||
Source (natural) | Organism: Rubinisphaera brasiliensis DSM 5305 (bacteria) | |||||||||||||||
Source (recombinant) | Organism: Escherichia coli (E. coli) | |||||||||||||||
Buffer solution | pH: 8.8 | |||||||||||||||
Buffer component |
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Specimen | Conc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | |||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3 | |||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 283 K |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 165000 X / Nominal defocus max: 1800 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm |
Specimen holder | Cryogen: NITROGEN |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) |
-Processing
EM software | Name: PHENIX / Version: 1.21.1_5286 / Category: model refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
Particle selection | Num. of particles selected: 3171027 | ||||||||||||||||||||||||
Symmetry | Point symmetry: D2 (2x2 fold dihedral) | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.17 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 95257 / Algorithm: BACK PROJECTION / Symmetry type: POINT | ||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL / Space: REAL | ||||||||||||||||||||||||
Atomic model building | Accession code: AF-F0SIS6-F1 / Source name: AlphaFold / Type: in silico model | ||||||||||||||||||||||||
Refine LS restraints |
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