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- EMDB-31804: LolCDE-apo in nanodiscs -

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Basic information

Entry
Database: EMDB / ID: EMD-31804
TitleLolCDE-apo in nanodiscs
Map data
Sample
  • Complex: LolCDE-apo in nanodiscs
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolC
    • Protein or peptide: Lipoprotein-releasing system ATP-binding protein LolD
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolE
Keywordsmembrane protein / ABC transporter
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 / 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 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: 4.2 Å
AuthorsLuo QS / Bei WW / Shi HG
Funding support China, 3 items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2016YFA0500404 China
Chinese Academy of SciencesXDB37020201 China
National Natural Science Foundation of China (NSFC)31625009 China
CitationJournal: PLoS Biol / Year: 2022
Title: Cryo-EM structures of LolCDE reveal the molecular mechanism of bacterial lipoprotein sorting in Escherichia coli.
Authors: Weiwei Bei / Qingshan Luo / Huigang Shi / Haizhen Zhou / Min Zhou / Xinzheng Zhang / Yihua Huang /
Abstract: Bacterial lipoproteins perform a diverse array of functions including bacterial envelope biogenesis and microbe-host interactions. Lipoproteins in gram-negative bacteria are sorted to the outer ...Bacterial lipoproteins perform a diverse array of functions including bacterial envelope biogenesis and microbe-host interactions. Lipoproteins in gram-negative bacteria are sorted to the outer membrane (OM) via the localization of lipoproteins (Lol) export pathway. The ATP-binding cassette (ABC) transporter LolCDE initiates the Lol pathway by selectively extracting and transporting lipoproteins for trafficking. Here, we report cryo-EM structures of LolCDE in apo, lipoprotein-bound, and AMPPNP-bound states at a resolution of 3.5 to 4.2 Å. Structure-based disulfide crosslinking, photo-crosslinking, and functional complementation assay verify the apo-state structure and reveal the molecular details regarding substrate selectivity and substrate entry route. Our studies snapshot 3 functional states of LolCDE in a transport cycle, providing deep insights into the mechanisms that underlie LolCDE-mediated lipoprotein sorting in E. coli.
History
DepositionAug 23, 2021-
Header (metadata) releaseAug 31, 2022-
Map releaseAug 31, 2022-
UpdateOct 4, 2023-
Current statusOct 4, 2023Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_31804.png

Downloads & links

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Map

FileDownload / File: emd_31804.map.gz / Format: CCP4 / Size: 27 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.36 Å/pix.
x 192 pix.
= 261.12 Å		1.36 Å/pix.
x 192 pix.
= 261.12 Å		1.36 Å/pix.
x 192 pix.
= 261.12 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.36 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0254
Minimum - Maximum-0.07644686 - 0.11641194
Average (Standard dev.)0.000020858903 (±0.0049947645)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions192192192
Spacing192192192
CellA=B=C: 261.12 Å
α=β=γ: 90.0 °

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Supplemental data

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Sample components

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Entire : LolCDE-apo in nanodiscs

EntireName: LolCDE-apo in nanodiscs
Components
  • Complex: LolCDE-apo in nanodiscs
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolC
    • Protein or peptide: Lipoprotein-releasing system ATP-binding protein LolD
    • Protein or peptide: Lipoprotein-releasing system transmembrane protein LolE

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Supramolecule #1: LolCDE-apo in nanodiscs

SupramoleculeName: LolCDE-apo in nanodiscs / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Escherichia coli K-12 (bacteria) / Strain: K-12

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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) / Strain: K12
Molecular weightTheoretical: 43.295516 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (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 ATP-binding protein LolD

MacromoleculeName: Lipoprotein-releasing system ATP-binding protein LolD / type: protein_or_peptide / ID: 2 / 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) / Strain: K-12
Molecular weightTheoretical: 25.471291 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (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 ADEPTGNLDA RNADSIFQLL GELNRLQGTA FLVVTHDLQL AKRMSRQLEM RDGRLTAELS LMGAE

UniProtKB: Lipoprotein-releasing system ATP-binding protein LolD

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Macromolecule #3: Lipoprotein-releasing system transmembrane protein LolE

MacromoleculeName: Lipoprotein-releasing system transmembrane protein LolE
type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli K-12 (bacteria) / Strain: K-12
Molecular weightTheoretical: 45.385977 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (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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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8
GridModel: Quantifoil R2/2 / Support film - Material: CARBON / Support film - topology: HOLEY
VitrificationCryogen name: NITROGEN / Chamber humidity: 100 % / Chamber temperature: 298 K / Instrument: LEICA EM GP

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Electron microscopy

MicroscopeFEI TITAN
Image recordingFilm or detector model: GATAN K2 BASE (4k x 4k) / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD

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Image processing

Startup modelType of model: PDB ENTRY
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 137445
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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