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- EMDB-50329: Single particle cryo-EM maps of AcrB V612F monomer classes in DDM -

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Basic information

Entry
Database: EMDB / ID: EMD-50329
TitleSingle particle cryo-EM maps of AcrB V612F monomer classes in DDM
Map dataMonomer class 1
Sample
  • Complex: Trimeric multidrug efflux pump subunit AcrB
    • Protein or peptide: Multidrug efflux pump subunit AcrB
KeywordsDrug efflux / RND transporter / TRANSPORT PROTEIN
Function / homology
Function and homology information


alkane transmembrane transporter activity / alkane transport / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / bile acid transmembrane transporter activity / xenobiotic transport / bile acid and bile salt transport ...alkane transmembrane transporter activity / alkane transport / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / bile acid transmembrane transporter activity / xenobiotic transport / bile acid and bile salt transport / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / fatty acid transport / response to toxic substance / response to xenobiotic stimulus / response to antibiotic / identical protein binding / membrane / plasma membrane
Similarity search - Function
Hydrophobe/amphiphile efflux-1 HAE1 / Multidrug efflux transporter AcrB TolC docking domain, DN/DC subdomains / Acriflavin resistance protein / AcrB/AcrD/AcrF family
Similarity search - Domain/homology
Multidrug efflux pump subunit AcrB
Similarity search - Component
Biological speciesEscherichia coli K-12 (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsLazarova M / Boernsen C / Frangakis A / Pos KM
Funding support Switzerland, Germany, 4 items
OrganizationGrant numberCountry
Swiss National Science Foundation3100A0_118402 Switzerland
German Research Foundation (DFG)SFB807-P18 Germany
German Research Foundation (DFG)SFB1507-P3 Germany
German Research Foundation (DFG)DFG-EXC115 Germany
CitationJournal: To Be Published
Title: Single particle cryo-EM maps of AcrB V612F monomer classes in DDM
Authors: Lazarova M / Boernsen C / Frangakis A / Pos KM
History
DepositionMay 17, 2024-
Header (metadata) releaseMay 28, 2025-
Map releaseMay 28, 2025-
UpdateMay 28, 2025-
Current statusMay 28, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_50329.png

Downloads & links

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Map

FileDownload / File: emd_50329.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMonomer class 1
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 256 pix.
= 268.8 Å		1.05 Å/pix.
x 256 pix.
= 268.8 Å		1.05 Å/pix.
x 256 pix.
= 268.8 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.05 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.013
Minimum - Maximum-0.016201353 - 0.040730603
Average (Standard dev.)0.00010370307 (±0.0015435135)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 268.8 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Monomer class 3

Fileemd_50329_additional_1.map
AnnotationMonomer class 3
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Monomer class 2

Fileemd_50329_additional_2.map
AnnotationMonomer class 2
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Monomer class 1 half map

Fileemd_50329_half_map_1.map
AnnotationMonomer class 1 half map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Monomer class 1 half map

Fileemd_50329_half_map_2.map
AnnotationMonomer class 1 half map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Trimeric multidrug efflux pump subunit AcrB

EntireName: Trimeric multidrug efflux pump subunit AcrB
Components
  • Complex: Trimeric multidrug efflux pump subunit AcrB
    • Protein or peptide: Multidrug efflux pump subunit AcrB

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Supramolecule #1: Trimeric multidrug efflux pump subunit AcrB

SupramoleculeName: Trimeric multidrug efflux pump subunit AcrB / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Molecular weightTheoretical: 344 KDa

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Macromolecule #1: Multidrug efflux pump subunit AcrB

MacromoleculeName: Multidrug efflux pump subunit AcrB / type: protein_or_peptide / ID: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli K-12 (bacteria)
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MPNFFIDRPI FAWVIAIIIM LAGGLAILKL PVAQYPTIAP PAVTISASYP GADAKTVQDT VTQVIEQNM NGIDNLMYMS SNSDSTGTVQ ITLTFESGTD ADIAQVQVQN KLQLAMPLLP Q EVQQQGVS VEKSSSSFLM VVGVINTDGT MTQEDISDYV AANMKDAISR ...String:
MPNFFIDRPI FAWVIAIIIM LAGGLAILKL PVAQYPTIAP PAVTISASYP GADAKTVQDT VTQVIEQNM NGIDNLMYMS SNSDSTGTVQ ITLTFESGTD ADIAQVQVQN KLQLAMPLLP Q EVQQQGVS VEKSSSSFLM VVGVINTDGT MTQEDISDYV AANMKDAISR TSGVGDVQLF GS QYAMRIW MNPNELNKFQ LTPVDVITAI KAQNAQVAAG QLGGTPPVKG QQLNASIIAQ TRL TSTEEF GKILLKVNQD GSRVLLRDVA KIELGGENYD IIAEFNGQPA SGLGIKLATG ANAL DTAAA IRAELAKMEP FFPSGLKIVY PYDTTPFVKI SIHEVVKTLV EAIILVFLVM YLFLQ NFRA TLIPTIAVPV VLLGTFAVLA AFGFSINTLT MFGMVLAIGL LVDDAIVVVE NVERVM AEE GLPPKEATRK SMGQIQGALV GIAMVLSAVF VPMAFFGGST GAIYRQFSIT IVSAMAL SV LVALILTPAL CATMLKPIAK GDHGEGKKGF FGWFNRMFEK STHHYTDSVG GILRSTGR Y LVLYLIIVVG MAYLFVRLPS SFLPDEDQGV FMTMVQLPAG ATQERTQKVL NEVTHYYLT KEKNNVESVF AFNGFGFAGR GQNTGIAFVS LKDWADRPGE ENKVEAITMR ATRAFSQIKD AMVFAFNLP AIVELGTATG FDFELIDQAG LGHEKLTQAR NQLLAEAAKH PDMLTSVRPN G LEDTPQFK IDIDQEKAQA LGVSINDINT TLGAAWGGSY VNDFIDRGRV KKVYVMSEAK YR MLPDDIG DWYVRAADGQ MVPFSAFSSS RWEYGSPRLE RYNGLPSMEI LGQAAPGKST GEA MELMEQ LASKLPTGVG YDWTGMSYQE RLSGNQAPSL YAISLIVVFL CLAALYESWS IPFS VMLVV PLGVIGALLA ATFRGLTNDV YFQVGLLTTI GLSAKNAILI VEFAKDLMDK EGKGL IEAT LDAVRMRLRP ILMTSLAFIL GVMPLVISTG AGSGAQNAVG TGVMGGMVTA TVLAIF FVP VFFVVVRRRF SRKNEDIEHS HTVDHHLEHH HHHH

UniProtKB: Multidrug efflux pump subunit AcrB

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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

Concentration1.8 mg/mL
BufferpH: 7.5
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 40 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: GIF Quantum SE / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 1482 / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.5 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 105000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 359904
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 49427
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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