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- PDB-7wdk: The structure of PldA-PA3488 complex -

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Basic information

Entry
Database: PDB / ID: 7wdk
TitleThe structure of PldA-PA3488 complex
Components
  • Phospholipase D
  • Tli4_C domain-containing protein
KeywordsIMMUNE SYSTEM / PldA / PA3488 / Complex
Function / homology
Function and homology information


phospholipase D activity / phospholipid catabolic process
Similarity search - Function
Tle cognate immunity protein 4, C-terminal domain / Tle cognate immunity protein 4 C-terminal domain / Phospholipase D family / Phospholipase D Active site motif / Phospholipase D. Active site motifs. / Phospholipase D/Transphosphatidylase / Phospholipase D phosphodiesterase active site profile.
Similarity search - Domain/homology
Tle cognate immunity protein 4 C-terminal domain-containing protein / Phospholipase D
Similarity search - Component
Biological speciesPseudomonas aeruginosa (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.05 Å
AuthorsZhao, L. / Yang, X.Y. / Li, Z.Q.
Funding support China, 1items
OrganizationGrant numberCountry
Chinese Academy of Sciences China
CitationJournal: Nat Commun / Year: 2022
Title: Structural insights into PA3488-mediated inactivation of Pseudomonas aeruginosa PldA.
Authors: Xiaoyun Yang / Zongqiang Li / Liang Zhao / Zhun She / Zengqiang Gao / Sen-Fang Sui / Yuhui Dong / Yanhua Li /
Abstract: PldA, a phospholipase D (PLD) effector, catalyzes hydrolysis of the phosphodiester bonds of glycerophospholipids-the main component of cell membranes-and assists the invasion of the opportunistic ...PldA, a phospholipase D (PLD) effector, catalyzes hydrolysis of the phosphodiester bonds of glycerophospholipids-the main component of cell membranes-and assists the invasion of the opportunistic pathogen Pseudomonas aeruginosa. As a cognate immunity protein, PA3488 can inhibit the activity of PldA to avoid self-toxicity. However, the precise inhibitory mechanism remains elusive. We determine the crystal structures of full-length and truncated PldA and the cryogenic electron microscopy structure of the PldA-PA3488 complex. Structural analysis reveals that there are different intermediates of PldA between the "open" and "closed" states of the catalytic pocket, accompanied by significant conformational changes in the "lid" region and the peripheral helical domain. Through structure-based mutational analysis, we identify the key residues responsible for the enzymatic activity of PldA. Together, these data provide an insight into the molecular mechanisms of PldA invasion and its neutralization by PA3488, aiding future design of PLD-targeted inhibitors and drugs.
History
DepositionDec 21, 2021Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 26, 2022Provider: repository / Type: Initial release
Revision 1.1Nov 9, 2022Group: Database references / Category: citation / Item: _citation.title

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Phospholipase D
B: Tli4_C domain-containing protein


Theoretical massNumber of molelcules
Total (without water)165,5672
Polymers165,5672
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Phospholipase D /


Mass: 122478.062 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) (bacteria)
Strain: ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1
Gene: pldA, PA3487 / Production host: Escherichia coli (E. coli) / References: UniProt: Q9HYC2
#2: Protein Tli4_C domain-containing protein


Mass: 43088.637 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (bacteria) / Gene: CGU42_05350, E4V10_17995, ECC04_007070, GNQ48_30755 / Production host: Escherichia coli (E. coli) / References: UniProt: A0A232D7B1

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: The structure of PldA-PA3488 complex / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Pseudomonas aeruginosa (bacteria)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2500 nm / Nominal defocus min: 1500 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.05 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 577905 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0049665
ELECTRON MICROSCOPYf_angle_d0.65513130
ELECTRON MICROSCOPYf_dihedral_angle_d4.6711326
ELECTRON MICROSCOPYf_chiral_restr0.0451415
ELECTRON MICROSCOPYf_plane_restr0.0051731

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