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- EMDB-51637: Cryo-EM structure of endogenous ATP-bound LolCDE with LolD-E171Q ... -

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Basic information

Entry
Database: EMDB / ID: EMD-51637
TitleCryo-EM structure of endogenous ATP-bound LolCDE with LolD-E171Q mutations in nanodiscs
Map data
Sample
  • Complex: Complex of endogenous ATP-bound LolCDE with LolD-E171Q mutations in nanodiscs
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolC
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolE
    • Protein or peptide: Lipoprotein-releasing system ATP-binding protein LolD
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE
KeywordsLolCDE / /lipoprotein / /extraction / /transportation / TRANSPORT PROTEIN
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 / ATP-binding cassette (ABC) transporter complex / transmembrane transport / outer membrane-bounded periplasmic space ...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 / ATP-binding cassette (ABC) transporter complex / transmembrane transport / outer membrane-bounded periplasmic space / 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 / ABC transporter, lipoprotein release, LolD / MacB, ATP-binding domain / 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 / ABC transporter, lipoprotein release, LolD / MacB, ATP-binding domain / ABC3 transporter permease protein domain / FtsX-like permease C-terminal / 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 system transmembrane protein LolC / Lipoprotein-releasing system ATP-binding protein LolD / Lipoprotein-releasing system transmembrane protein LolE
Similarity search - Component
Biological speciesEscherichia coli K-12 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsDong H / Shen C / Tang X / Qiao W
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)81971974 China
CitationJournal: Signal Transduct Target Ther / Year: 2024
Title: Deciphering the molecular basis of lipoprotein recognition and transport by LolCDE.
Authors: Wen Qiao / Chongrong Shen / Yujiao Chen / Shenghai Chang / Xin Wang / Lili Yang / Jie Pang / Qinghua Luo / Zhibo Zhang / Yingxin Xiang / Chao Zhao / Guangwen Lu / Bi-Sen Ding / Binwu Ying / ...Authors: Wen Qiao / Chongrong Shen / Yujiao Chen / Shenghai Chang / Xin Wang / Lili Yang / Jie Pang / Qinghua Luo / Zhibo Zhang / Yingxin Xiang / Chao Zhao / Guangwen Lu / Bi-Sen Ding / Binwu Ying / Xiaodi Tang / Haohao Dong /
Abstract: Outer membrane (OM) lipoproteins serve vital roles in Gram-negative bacteria, contributing to their pathogenicity and drug resistance. For these lipoproteins to function, they must be transported ...Outer membrane (OM) lipoproteins serve vital roles in Gram-negative bacteria, contributing to their pathogenicity and drug resistance. For these lipoproteins to function, they must be transported from the inner membrane (IM), where they are assembled, to the OM by the ABC transporter LolCDE. We have previously captured structural snapshots of LolCDE in multiple states, revealing its dynamic conformational changes. However, the exact mechanism by which LolCDE recognizes and transfers lipoprotein between domains remains unclear. Here, we characterized the E. coli LolCDE complex bound with endogenous lipoprotein or ATP to explore the molecular features governing its substrate binding and transport functions. We found that the N-terminal unstructured linker of lipoprotein is critical for efficient binding by LolCDE; it must be sufficiently long to keep the lipoprotein's main body outside the complex while allowing the triacyl chains to bind within the central cavity. Mutagenic assays identified key residues that mediate allosteric communication between the cytoplasmic and transmembrane domains and in the periplasmic domain to form a lipoprotein transport pathway at the LolC-LolE interface. This study provides insights into the OM lipoprotein relocation process mediated by LolCDE, with significant implications for antimicrobial drug development.
History
DepositionSep 25, 2024-
Header (metadata) releaseJan 8, 2025-
Map releaseJan 8, 2025-
UpdateJan 15, 2025-
Current statusJan 15, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_51637.png

Downloads & links

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Map

FileDownload / File: emd_51637.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.01 Å/pix.
x 200 pix.
= 202.8 Å		1.01 Å/pix.
x 200 pix.
= 202.8 Å		1.01 Å/pix.
x 200 pix.
= 202.8 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.014 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.01
Minimum - Maximum-0.051960178 - 0.11094707
Average (Standard dev.)0.0000017005055 (±0.0037067449)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 202.80002 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_51637_half_map_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_51637_half_map_2.map
Projections & Slices
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Sample components

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Entire : Complex of endogenous ATP-bound LolCDE with LolD-E171Q mutations ...

EntireName: Complex of endogenous ATP-bound LolCDE with LolD-E171Q mutations in nanodiscs
Components
  • Complex: Complex of endogenous ATP-bound LolCDE with LolD-E171Q mutations in nanodiscs
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolC
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolE
    • Protein or peptide: Lipoprotein-releasing system ATP-binding protein LolD
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-TRIPHOSPHATE

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Supramolecule #1: Complex of endogenous ATP-bound LolCDE with LolD-E171Q mutations ...

SupramoleculeName: Complex of endogenous ATP-bound LolCDE with LolD-E171Q mutations in nanodiscs
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Escherichia coli K-12 (bacteria)

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Macromolecule #1: Lipoprotein-releasing system transmembrane protein LolC

MacromoleculeName: Lipoprotein-releasing system transmembrane protein LolC
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Molecular weightTheoretical: 43.295516 KDa
Recombinant expressionOrganism: Escherichia coli K-12 (bacteria)
SequenceString: MYQPVALFIG LRYMRGRAAD RFGRFVSWLS TIGITLGVMA LVTVLSVMNG FERELQNNIL GLMPQAILSS EHGSLNPQQL PETAVKLDG VNRVAPITTG DVVLQSARSV AVGVMLGIDP AQKDPLTPYL VNVKQTDLEP GKYNVILGEQ LASQLGVNRG D QIRVMVPS ...String:
MYQPVALFIG LRYMRGRAAD RFGRFVSWLS TIGITLGVMA LVTVLSVMNG FERELQNNIL GLMPQAILSS EHGSLNPQQL PETAVKLDG VNRVAPITTG DVVLQSARSV AVGVMLGIDP AQKDPLTPYL VNVKQTDLEP GKYNVILGEQ LASQLGVNRG D QIRVMVPS ASQFTPMGRI PSQRLFNVIG TFAANSEVDG YEMLVNIEDA SRLMRYPAGN ITGWRLWLDE PLKVDSLSQQ KL PEGSKWQ DWRDRKGELF QAVRMEKNMM GLLLSLIVAV AAFNIITSLG LMVMEKQGEV AILQTQGLTP RQIMMVFMVQ GAS AGIIGA ILGAALGALL ASQLNNLMPI IGVLLDGAAL PVAIEPLQVI VIALVAMAIA LLSTLYPSWR AAATQPAEAL RYE

UniProtKB: Lipoprotein-releasing system transmembrane protein LolC

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Macromolecule #2: Lipoprotein-releasing system transmembrane protein LolE

MacromoleculeName: Lipoprotein-releasing system transmembrane protein LolE
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Molecular weightTheoretical: 45.385977 KDa
Recombinant expressionOrganism: Escherichia coli K-12 (bacteria)
SequenceString: MAMPLSLLIG LRFSRGRRRG GMVSLISVIS TIGIALGVAV LIVGLSAMNG FERELNNRIL AVVPHGEIEA VDQPWTNWQE ALDHVQKVP GIAAAAPYIN FTGLVESGAN LRAIQVKGVN PQQEQRLSAL PSFVQGDAWR NFKAGEQQII IGKGVADALK V KQGDWVSI ...String:
MAMPLSLLIG LRFSRGRRRG GMVSLISVIS TIGIALGVAV LIVGLSAMNG FERELNNRIL AVVPHGEIEA VDQPWTNWQE ALDHVQKVP GIAAAAPYIN FTGLVESGAN LRAIQVKGVN PQQEQRLSAL PSFVQGDAWR NFKAGEQQII IGKGVADALK V KQGDWVSI MIPNSNPEHK LMQPKRVRLH VAGILQLSGQ LDHSFAMIPL ADAQQYLDMG SSVSGIALKM TDVFNANKLV RD AGEVTNS YVYIKSWIGT YGYMYRDIQM IRAIMYLAMV LVIGVACFNI VSTLVMAVKD KSGDIAVLRT LGAKDGLIRA IFV WYGLLA GLFGSLCGVI IGVVVSLQLT PIIEWIEKLI GHQFLSSDIY FIDFLPSELH WLDVFYVLVT ALLLSLLASW YPAR RASNI DPARVLSGQ

UniProtKB: Lipoprotein-releasing system transmembrane protein LolE

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Macromolecule #3: Lipoprotein-releasing system ATP-binding protein LolD

MacromoleculeName: Lipoprotein-releasing system ATP-binding protein LolD / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
EC number: Translocases; Catalysing the translocation of other compounds; Linked to the hydrolysis of a nucleoside triphosphate
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Molecular weightTheoretical: 26.57548 KDa
Recombinant expressionOrganism: Escherichia coli K-12 (bacteria)
SequenceString: MNKILLQCDN LCKRYQEGSV QTDVLHNVSF SVGEGEMMAI VGSSGSGKST LLHLLGGLDT PTSGDVIFNG QPMSKLSSAA KAELRNQKL GFIYQFHHLL PDFTALENVA MPLLIGKKKP AEINSRALEM LKAVGLDHRA NHRPSELSGG ERQRVAIARA L VNNPRLVL ...String:
MNKILLQCDN LCKRYQEGSV QTDVLHNVSF SVGEGEMMAI VGSSGSGKST LLHLLGGLDT PTSGDVIFNG QPMSKLSSAA KAELRNQKL GFIYQFHHLL PDFTALENVA MPLLIGKKKP AEINSRALEM LKAVGLDHRA NHRPSELSGG ERQRVAIARA L VNNPRLVL ADQPTGNLDA RNADSIFQLL GELNRLQGTA FLVVTHDLQL AKRMSRQLEM RDGRLTAELS LMGAEHHHHH HH H

UniProtKB: Lipoprotein-releasing system ATP-binding protein LolD

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Macromolecule #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 2 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #5: ADENOSINE-5'-TRIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-TRIPHOSPHATE / type: ligand / ID: 5 / Number of copies: 2 / Formula: ATP
Molecular weightTheoretical: 507.181 Da
Chemical component information

ChemComp-ATP:
ADENOSINE-5'-TRIPHOSPHATE / ATP, energy-carrying molecule*YM

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.8
GridModel: Quantifoil / Material: GOLD / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Pressure: 0.04 kPa
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Instrument: FEI VITROBOT MARK I
DetailsThis sample was mono disperse

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 64.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 268413
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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