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- PDB-7ari: LolCDE apo structure -

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Basic information

Entry
Database: PDB / ID: 7ari
TitleLolCDE apo structure
Components
  • Lipoprotein-releasing ABC transporter permease subunit LolC
  • Lipoprotein-releasing system ATP-binding protein LolD
  • Lipoprotein-releasing system transmembrane protein LolE
KeywordsPROTEIN TRANSPORT / LolCDE / lipoprotein / lipoprotein transporter / lipoprotein sorting and transport
Function / homology
Function and homology information


lipoprotein releasing activity / protein localization to outer membrane / lipoprotein localization to outer membrane / plasma membrane protein complex / Translocases; Catalysing the translocation of other compounds; Linked to the hydrolysis of a nucleoside triphosphate / lipoprotein transport / transmembrane transporter activity / membrane => GO:0016020 / ATP-binding cassette (ABC) transporter complex / transmembrane transport ...lipoprotein releasing activity / protein localization to outer membrane / lipoprotein localization to outer membrane / plasma membrane protein complex / Translocases; Catalysing the translocation of other compounds; Linked to the hydrolysis of a nucleoside triphosphate / lipoprotein transport / transmembrane transporter activity / membrane => GO:0016020 / ATP-binding cassette (ABC) transporter complex / transmembrane transport / ATP hydrolysis activity / ATP binding / plasma membrane
Similarity search - Function
Lipoprotein releasing system, ATP-binding protein / Lipoprotein-releasing system transmembrane protein LolE, gammaproteobacteria type / Lipoprotein release ATP-binding protein lolD family profile. / Lipoprotein-releasing system transmembrane protein LolC/E / : / MacB-like periplasmic core domain / MacB-like periplasmic core domain / MacB, ATP-binding domain / ABC transporter, lipoprotein release, LolD / ABC3 transporter permease protein domain ...Lipoprotein releasing system, ATP-binding protein / Lipoprotein-releasing system transmembrane protein LolE, gammaproteobacteria type / Lipoprotein release ATP-binding protein lolD family profile. / Lipoprotein-releasing system transmembrane protein LolC/E / : / MacB-like periplasmic core domain / MacB-like periplasmic core domain / MacB, ATP-binding domain / ABC transporter, lipoprotein release, LolD / ABC3 transporter permease protein domain / FtsX-like permease family / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Lipoprotein-releasing ABC transporter permease subunit LolC / Lipoprotein-releasing system ATP-binding protein LolD / Lipoprotein-releasing system transmembrane protein LolE
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.4 Å
AuthorsTang, X.D. / Chang, S.H. / Zhang, K. / Wang, T. / Luo, Q.H. / Qiao, W. / Wang, C. / Zhang, Z.B. / Zhang, Z.Y. / Zhu, X.F. ...Tang, X.D. / Chang, S.H. / Zhang, K. / Wang, T. / Luo, Q.H. / Qiao, W. / Wang, C. / Zhang, Z.B. / Zhang, Z.Y. / Zhu, X.F. / Dong, C.J. / Zhang, X. / Dong, H.H.
CitationJournal: Nat Struct Mol Biol / Year: 2021
Title: Structural basis for bacterial lipoprotein relocation by the transporter LolCDE.
Authors: Xiaodi Tang / Shenghai Chang / Ke Zhang / Qinghua Luo / Zhengyu Zhang / Ting Wang / Wen Qiao / Chen Wang / Chongrong Shen / Zhibo Zhang / Xiaofeng Zhu / Xiawei Wei / Changjiang Dong / Xing ...Authors: Xiaodi Tang / Shenghai Chang / Ke Zhang / Qinghua Luo / Zhengyu Zhang / Ting Wang / Wen Qiao / Chen Wang / Chongrong Shen / Zhibo Zhang / Xiaofeng Zhu / Xiawei Wei / Changjiang Dong / Xing Zhang / Haohao Dong /
Abstract: Lipoproteins in the outer membrane of Gram-negative bacteria are involved in various vital physiological activities, including multidrug resistance. Synthesized in the cytoplasm and matured in the ...Lipoproteins in the outer membrane of Gram-negative bacteria are involved in various vital physiological activities, including multidrug resistance. Synthesized in the cytoplasm and matured in the inner membrane, lipoproteins must be transported to the outer membrane through the Lol pathway mediated by the ATP-binding cassette transporter LolCDE in the inner membrane via an unknown mechanism. Here, we report cryo-EM structures of Escherichia coli LolCDE in apo, lipoprotein-bound, LolA-bound, ADP-bound and AMP-PNP-bound states at a resolution of 3.2-3.8 Å, covering the complete lipoprotein transport cycle. Mutagenesis and in vivo viability assays verify features of the structures and reveal functional residues and structural characteristics of LolCDE. The results provide insights into the mechanisms of sorting and transport of outer-membrane lipoproteins and may guide the development of novel therapies against multidrug-resistant Gram-negative bacteria.
History
DepositionOct 25, 2020Deposition site: PDBE / Processing site: PDBE
Revision 1.0Apr 7, 2021Provider: repository / Type: Initial release
Revision 1.1Apr 14, 2021Group: Database references / Category: citation / citation_author / Item: _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Apr 28, 2021Group: Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3May 1, 2024Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type

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Structure visualization

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Structure viewerMolecule:
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Assembly

Deposited unit
C: Lipoprotein-releasing ABC transporter permease subunit LolC
E: Lipoprotein-releasing system transmembrane protein LolE
F: Lipoprotein-releasing system ATP-binding protein LolD
D: Lipoprotein-releasing system ATP-binding protein LolD


Theoretical massNumber of molelcules
Total (without water)141,8344
Polymers141,8344
Non-polymers00
Water00
1


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

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Components

#1: Protein Lipoprotein-releasing ABC transporter permease subunit LolC


Mass: 43295.516 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: lolC, FAZ83_19940 / Production host: Escherichia coli BL21(DE3) (bacteria) / Variant (production host): C43 / References: UniProt: A0A4S5ATA9
#2: Protein Lipoprotein-releasing system transmembrane protein LolE


Mass: 45385.977 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: lolE, ycfW, b1118, JW1104 / Production host: Escherichia coli BL21(DE3) (bacteria) / Variant (production host): C43 / References: UniProt: P75958
#3: Protein Lipoprotein-releasing system ATP-binding protein LolD


Mass: 26576.465 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (strain K12) (bacteria)
Strain: K12 / Gene: lolD, ycfV, b1117, JW5162 / Production host: Escherichia coli BL21(DE3) (bacteria) / Variant (production host): C43
References: UniProt: P75957, Translocases; Catalysing the translocation of other compounds; Linked to the hydrolysis of a nucleoside triphosphate

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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: LolCDE apo structure / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Escherichia coli (E. coli) / Strain: K12
Source (recombinant)Organism: Escherichia coli (E. coli) / Strain: C43 / Plasmid: pTRC99a
Buffer solutionpH: 7.8 / Details: 20 mM Tris-HCl, pH 7.8, 150 mM NaCl and 0.05% LMNG
SpecimenConc.: 4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: Three protein complex
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE / Humidity: 95 %

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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 FIELD
Specimen holderCryogen: NITROGEN
Image recordingElectron dose: 40 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
EM imaging opticsPhase plate: VOLTA PHASE PLATE

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Processing

SoftwareName: PHENIX / Version: 1.14_3260: / Classification: refinement
EM software
IDNameCategory
1RELIONparticle selection
4GctfCTF correction
12RELIONclassification
13RELION3D reconstruction
CTF correctionType: PHASE FLIPPING ONLY
Particle selectionNum. of particles selected: 3702388
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 172703 / Symmetry type: POINT
Atomic model building

3D fitting-ID: 1 / Source name: PDB / Type: experimental model

IDPDB-IDPdb chain-IDAccession codeInitial refinement model-ID
15NAA

5naa

C5NAA1
25UDF

5udf

E5UDF2
32PCL

2pcl

D2PCL3
42PCL

2pcl

F2PCL3

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