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- PDB-13hq: Cryo-EM structure of Pseudomonas aeruginosa soluble lipoprotein PA3214 -

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Basic information

Entry
Database: PDB / ID: 13hq
TitleCryo-EM structure of Pseudomonas aeruginosa soluble lipoprotein PA3214
ComponentsABC-type transport auxiliary lipoprotein component domain-containing protein
KeywordsLIPID TRANSPORT / lipoprotein / Pseudomonas aeruginosa / MCE system
Function / homologyABC-type transport auxiliary lipoprotein component / ABC-type transport auxiliary lipoprotein component / Prokaryotic membrane lipoprotein lipid attachment site profile. / ABC-type transport auxiliary lipoprotein component domain-containing protein
Function and homology information
Biological speciesPseudomonas aeruginosa PAO1 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.67 Å
AuthorsRedler, R. / Giacometti, S.I. / Coudray, N. / Bhabha, G. / Ekiert, D.C.
Funding support United States, 5items
OrganizationGrant numberCountry
National Science Foundation (NSF, United States)2021318502 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM128777 United States
The Pew Charitable Trusts00033055 United States
National Institutes of Health/National Cancer Institute (NIH/NCI)P30CA016087 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R24GM154185 United States
CitationJournal: To Be Published
Title: Interactions of outer membrane lipoproteins P. aeruginosa PA3214 and E. coli PqiC with their MCE protein binding partners, PA3213 and PqiB
Authors: Giacometti, S.I. / Coudray, N. / Redler, R. / Bhabha, G. / Ekiert, D.C.
History
DepositionMay 6, 2026Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 20, 2026Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 20, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: ABC-type transport auxiliary lipoprotein component domain-containing protein
B: ABC-type transport auxiliary lipoprotein component domain-containing protein
C: ABC-type transport auxiliary lipoprotein component domain-containing protein
D: ABC-type transport auxiliary lipoprotein component domain-containing protein
E: ABC-type transport auxiliary lipoprotein component domain-containing protein
F: ABC-type transport auxiliary lipoprotein component domain-containing protein
G: ABC-type transport auxiliary lipoprotein component domain-containing protein
H: ABC-type transport auxiliary lipoprotein component domain-containing protein


Theoretical massNumber of molelcules
Total (without water)183,3828
Polymers183,3828
Non-polymers00
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
ABC-type transport auxiliary lipoprotein component domain-containing protein


Mass: 22922.693 Da / Num. of mol.: 8
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa PAO1 (bacteria) / Gene: PA3214 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9HZ26
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: PA3214 / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.1644 kDa/nm / Experimental value: NO
Source (natural)Organism: Pseudomonas aeruginosa (bacteria) / Strain: PAO1
Source (recombinant)Organism: Escherichia coli (E. coli) / Strain: BL21(DE3)
Buffer solutionpH: 8
Buffer component
IDConc.NameFormulaBuffer-ID
120 mMHEPES1
2150 mMSodium chlorideNaCl1
SpecimenConc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K

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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 magnification: 22500 X / Nominal defocus max: 2100 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOCONTINUUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 6463

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Processing

EM software
IDNameVersionCategoryDetails (eV)
1cryoSPARCparticle selectionTemplate picking
2SerialEMimage acquisition
4cryoSPARCCTF correctionCTFFIND4
7Cootmodel fitting
9cryoSPARCinitial Euler assignment
10cryoSPARCfinal Euler assignment
11cryoSPARCclassification
12cryoSPARC3D reconstruction
13PHENIX1.21.2_5419model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 3638701
SymmetryPoint symmetry: C8 (8 fold cyclic)
3D reconstructionResolution: 2.67 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 654956 / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingDetails: Phyre2 / Source name: Other / Type: in silico model
RefinementHighest resolution: 2.67 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00211000
ELECTRON MICROSCOPYf_angle_d0.55514944
ELECTRON MICROSCOPYf_dihedral_angle_d11.9754136
ELECTRON MICROSCOPYf_chiral_restr0.041648
ELECTRON MICROSCOPYf_plane_restr0.0062000

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