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- PDB-9o1e: Pseudomonas aeruginosa ATPase State2a Fo focused -

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Basic information

Entry
Database: PDB / ID: 9o1e
TitlePseudomonas aeruginosa ATPase State2a Fo focused
Components
  • ATP synthase subunit a
  • ATP synthase subunit b
  • ATP synthase subunit c
KeywordsELECTRON TRANSPORT / ATPase / energy
Function / homology
Function and homology information


proton motive force-driven plasma membrane ATP synthesis / proton-transporting two-sector ATPase complex, proton-transporting domain / proton-transporting ATPase activity, rotational mechanism / proton-transporting ATP synthase complex / proton-transporting ATP synthase activity, rotational mechanism / lipid binding / plasma membrane
Similarity search - Function
ATP synthase, F0 complex, subunit b, bacterial / F-type ATP synthase subunit B-like, membrane domain superfamily / : / ATP synthase, F0 complex, subunit A, bacterial/chloroplast / ATP synthase, F0 complex, subunit b/b', bacterial/chloroplast / ATP synthase B/B' CF(0) / ATP synthase, F0 complex, subunit C, bacterial/chloroplast / ATP synthase, F0 complex, subunit A / ATP synthase, F0 complex, subunit A, active site / ATP synthase, F0 complex, subunit A superfamily ...ATP synthase, F0 complex, subunit b, bacterial / F-type ATP synthase subunit B-like, membrane domain superfamily / : / ATP synthase, F0 complex, subunit A, bacterial/chloroplast / ATP synthase, F0 complex, subunit b/b', bacterial/chloroplast / ATP synthase B/B' CF(0) / ATP synthase, F0 complex, subunit C, bacterial/chloroplast / ATP synthase, F0 complex, subunit A / ATP synthase, F0 complex, subunit A, active site / ATP synthase, F0 complex, subunit A superfamily / ATP synthase A chain / ATP synthase a subunit signature. / ATP synthase, F0 complex, subunit C / F1F0 ATP synthase subunit C superfamily / ATP synthase, F0 complex, subunit C, DCCD-binding site / ATP synthase c subunit signature. / V-ATPase proteolipid subunit C-like domain / F/V-ATP synthase subunit C superfamily / ATP synthase subunit C
Similarity search - Domain/homology
ATP synthase subunit c / ATP synthase subunit a / ATP synthase subunit b
Similarity search - Component
Biological speciesPseudomonas aeruginosa (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.59 Å
AuthorsStewart, A.G. / Sobti, M.
Funding support Australia, 1items
OrganizationGrant numberCountry
National Health and Medical Research Council (NHMRC, Australia) Australia
CitationJournal: Nat Commun / Year: 2025
Title: Distinct structural features of Pseudomonas aeruginosa ATP synthase revealed by cryo-electron microscopy.
Authors: Meghna Sobti / Adam P Gunn / Simon H J Brown / Lauren Zavan / Vesper M Fraunfelter / Amanda L Wolfe / Christopher A McDevitt / P Ryan Steed / Alastair G Stewart /
Abstract: FF ATP synthase is the ubiquitous enzyme that synthesizes cellular ATP by coupling proton-motive force with rotational catalysis. Structural differences between prokaryotic and eukaryotic ATP ...FF ATP synthase is the ubiquitous enzyme that synthesizes cellular ATP by coupling proton-motive force with rotational catalysis. Structural differences between prokaryotic and eukaryotic ATP synthases offer potential targets for antimicrobial development. Here, we present the 2.0-2.4 Å resolution cryo-electron microscopy structures of the ATP synthase from Pseudomonas aeruginosa, an opportunistic bacterial pathogen capable of causing serious infections in humans. Our structures identify two distinctive features of this species' enzyme: a distinct binding site for the inhibitory ε subunit, and a coordinated metal ion capping the cytoplasmic proton channel. Lower-resolution maps of the enzyme following incubation with MgATP showed conformational rearrangements of the ε subunit during activation. Visualization of bound water molecules in the periplasmic half-channel supports a Grotthuss proton-transfer mechanism. Focused classification of the F motor resolves distinct ~11° sub-steps in the c-ring, corresponding to protonation and deprotonation events. Functional analyses show that modifications to either the ε subunit or the metal binding site influence ATP synthesis and hydrolysis. Mass spectrometry analyses suggests that the physiological metal within the complex is zinc. Collectively, these findings define structural features of P. aeruginosa ATP synthase that could serve as targets for antimicrobial therapeutics.
History
DepositionApr 3, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 10, 2025Provider: repository / Type: Initial release
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
I: ATP synthase subunit c
J: ATP synthase subunit c
L: ATP synthase subunit c
M: ATP synthase subunit c
N: ATP synthase subunit c
O: ATP synthase subunit c
P: ATP synthase subunit c
Q: ATP synthase subunit c
R: ATP synthase subunit c
S: ATP synthase subunit c
X: ATP synthase subunit b
Y: ATP synthase subunit b
a: ATP synthase subunit a
hetero molecules


Theoretical massNumber of molelcules
Total (without water)152,08114
Polymers152,01513
Non-polymers651
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein
ATP synthase subunit c / ATP synthase F(0) sector subunit c / F-type ATPase subunit c / F-ATPase subunit c / Lipid-binding protein


Mass: 8611.380 Da / Num. of mol.: 10
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (bacteria) / Gene: atpE, PSPA7_6361 / Production host: Escherichia coli (E. coli) / References: UniProt: A6VF37
#2: Protein ATP synthase subunit b / ATP synthase F(0) sector subunit b / ATPase subunit I / F-type ATPase subunit b / F-ATPase subunit b


Mass: 16978.346 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (bacteria) / Gene: atpF, PA14_73290 / Production host: Escherichia coli (E. coli) / References: UniProt: Q02DF0
#3: Protein ATP synthase subunit a / ATP synthase F0 sector subunit a / F-ATPase subunit 6


Mass: 31944.635 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (bacteria) / Gene: atpB, PSPA7_6362 / Production host: Escherichia coli (E. coli) / References: UniProt: A6VF38
#4: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationN

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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: Pseudomonas aeruginosa ATPase / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Source (natural)Organism: Pseudomonas aeruginosa (bacteria)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE / Humidity: 100 %

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 65 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.59 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 58576 / Symmetry type: POINT

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