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- EMDB-40828: Inward-facing narrow conformation of bovine multidrug resistance ... -

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Basic information

Entry
Database: EMDB / ID: EMD-40828
TitleInward-facing narrow conformation of bovine multidrug resistance protein 4 (MRP4) in MSP lipid nanodisc
Map dataOutput density from cryoSPARC non-uniform refinement.
Sample
  • Organelle or cellular component: Inward-facing narrow conformation of bovine multidrug resistance protein 4 (MRP4) in MSP lipid nanodisc
    • Protein or peptide: Multidrug resistance-associated protein 4
KeywordsABC transporter / multidrug resistance-associated protein / membrane protein / transport protein
Function / homology
Function and homology information


Paracetamol ADME / Platelet degranulation / Azathioprine ADME / ABC-family proteins mediated transport / ATPase-coupled transmembrane transporter activity / ABC-type transporter activity / transmembrane transport / ATP hydrolysis activity / ATP binding / plasma membrane
Similarity search - Function
ATP-binding cassette sub-family C member 4 / : / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter ...ATP-binding cassette sub-family C member 4 / : / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / 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
ATP binding cassette subfamily C member 4
Similarity search - Component
Biological speciesBos taurus (cattle)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsPourmal S / Stroud RM
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM24485 United States
CitationJournal: Nat Struct Mol Biol / Year: 2024
Title: Structural basis of prostaglandin efflux by MRP4.
Authors: Sergei Pourmal / Evan Green / Ruchika Bajaj / Ilan E Chemmama / Giselle M Knudsen / Meghna Gupta / Andrej Sali / Yifan Cheng / Charles S Craik / Deanna L Kroetz / Robert M Stroud /
Abstract: Multidrug resistance protein 4 (MRP4) is a broadly expressed ATP-binding cassette transporter that is unique among the MRP subfamily for transporting prostanoids, a group of signaling molecules ...Multidrug resistance protein 4 (MRP4) is a broadly expressed ATP-binding cassette transporter that is unique among the MRP subfamily for transporting prostanoids, a group of signaling molecules derived from unsaturated fatty acids. To better understand the basis of the substrate selectivity of MRP4, we used cryogenic-electron microscopy to determine six structures of nanodisc-reconstituted MRP4 at various stages throughout its transport cycle. Substrate-bound structures of MRP4 in complex with PGE, PGE and the sulfonated-sterol DHEA-S reveal a common binding site that accommodates a diverse set of organic anions and suggest an allosteric mechanism for substrate-induced enhancement of MRP4 ATPase activity. Our structure of a catalytically compromised MRP4 mutant bound to ATP-Mg is outward-occluded, a conformation previously unobserved in the MRP subfamily and consistent with an alternating-access transport mechanism. Our study provides insights into the endogenous function of this versatile efflux transporter and establishes a basis for MRP4-targeted drug design.
History
DepositionMay 20, 2023-
Header (metadata) releaseJan 17, 2024-
Map releaseJan 17, 2024-
UpdateMay 1, 2024-
Current statusMay 1, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_40828.png

Downloads & links

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Map

FileDownload / File: emd_40828.map.gz / Format: CCP4 / Size: 83.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationOutput density from cryoSPARC non-uniform refinement.
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 280 pix.
= 233.52 Å		0.83 Å/pix.
x 280 pix.
= 233.52 Å		0.83 Å/pix.
x 280 pix.
= 233.52 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.834 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.48
Minimum - Maximum-1.3852603 - 2.4576375
Average (Standard dev.)0.0029501303 (±0.0687854)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions280280280
Spacing280280280
CellA=B=C: 233.52 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Output density from DeepEMhancer. Inputs are two half...

Fileemd_40828_additional_1.map
AnnotationOutput density from DeepEMhancer. Inputs are two half maps from cryoSPARC non-uniform refinement, using the "high resolution" protocol.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map A from cryoSPARC non-uniform refinement.

Fileemd_40828_half_map_1.map
AnnotationHalf map A from cryoSPARC non-uniform refinement.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map B from cryoSPARC non-uniform refinement.

Fileemd_40828_half_map_2.map
AnnotationHalf map B from cryoSPARC non-uniform refinement.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Inward-facing narrow conformation of bovine multidrug resistance ...

EntireName: Inward-facing narrow conformation of bovine multidrug resistance protein 4 (MRP4) in MSP lipid nanodisc
Components
  • Organelle or cellular component: Inward-facing narrow conformation of bovine multidrug resistance protein 4 (MRP4) in MSP lipid nanodisc
    • Protein or peptide: Multidrug resistance-associated protein 4

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Supramolecule #1: Inward-facing narrow conformation of bovine multidrug resistance ...

SupramoleculeName: Inward-facing narrow conformation of bovine multidrug resistance protein 4 (MRP4) in MSP lipid nanodisc
type: organelle_or_cellular_component / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Bos taurus (cattle)
Molecular weightTheoretical: 150 KDa

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Macromolecule #1: Multidrug resistance-associated protein 4

MacromoleculeName: Multidrug resistance-associated protein 4 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle)
Molecular weightTheoretical: 149.587297 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MQPVYPEVKP NPLRNANLCS RIFFWWLNPL FKIGHKRRLE EDDMYSVLPE DRSQHLGEEL QGYWDQEVLR AEKDAREPSL TKAIIKCYW KSYVVLGIFT LIEESTRVVQ PIILGKIIGY FENYDPSDSA ALYEAHGYAG VLSACTLVLA ILHHLYFYHV Q CAGMRLRV ...String:
MQPVYPEVKP NPLRNANLCS RIFFWWLNPL FKIGHKRRLE EDDMYSVLPE DRSQHLGEEL QGYWDQEVLR AEKDAREPSL TKAIIKCYW KSYVVLGIFT LIEESTRVVQ PIILGKIIGY FENYDPSDSA ALYEAHGYAG VLSACTLVLA ILHHLYFYHV Q CAGMRLRV AMCHMIYRKA LRLSNSAMGK TTTGQIVNLL SNDVNKFDQV TIFLHFLWAG PLQAIVVTAL LWMEIGISCL AG MAVLIIL LPLQSCIGKL FSSLRSKTAA FTDTRIRTMN EVITGIRIIK MYAWEKSFAD LITNLRRKEI SKILRSSYLR GMN LASFFV ASKIIVFVTF TTYVFLGNVI TASRVFVAVS LYGAVRLTVT LFFPSAVEKV SEAFVSIRRI KNFLLLDEIT QLHS QLPSD GKMIVNVQDF TAFWDKASDT PTLQSLSFTV RPGELLAVVG PVGAGKSSLL SAVLGELPPN QGQVSVHGRI AYVSQ QPWV FSGTVRSNIL FGKKYEKERY EKVIKACALK KDLQLLEDGD LTMIGDRGTT LSGGQKARVN LARAVYQDAD IYLLDD PLS AVDAEVSRHL FELCICQALH EKIRILVTHQ LQYLKAASQI LILKDGQMVQ KGTYTEFLKS GIDFGSLLKK ENEEAEP SP VPGSPTLRNR TFSESSVWSQ QSSRPSLKEA TPEGQDTENI QVTLTEESRS EGKVGFKAYK NYFTAGAHWF IIIFLILV N LAAQVSYILQ DWWLSYWANQ QSALNVTVNG QGNVTEKLDL NWYLGIYSGL TASTVLFGIV RSLLVFFVLV SSSQTLHNQ MFESILRAPV LFFDRNPIGR ILNRFSKDIG HMDDLLPLTY LDFIQTFLQV IGVVGVAVAV IPWIAIPLVP LGIVFFVLRR YFLETSRDV KRLESTTRSP VFSHLSSSLQ GLWTIRAYKA EQRFQELFDS HQDLHSEAWF LFLTTSRWFA VRLDAICAVF V IVVAFGSL ILAKTLDAGQ VGLALSYALT LMGMFQWCVR QSAEVENMMI SVERVIEYTD LEKEAPWEYQ KRPLPSWPHE GV IIFDNVN FSYSLDGPLV LKHLTALIKS KEKVGIVGRT GAGKSSLIAA LFRLSEPEGK IWIDKILTTE IGLHDLRKKM SII PQEPVL FTGTMRKNLD PFNEHSDEEL WNALEEVQLK EAIEDLPGKM DTELAESGSN FSVGQRQLVC LARAILRKNR ILII DEATA NVDPRTDELI QKKIREKFAH CTVLTIAHRL NTIIDSDKIM VLDSGRLKEY DEPYVLLQNR DSLFYKMVQQ LGKAE AAAL TETAKQVYFK RNYPDITHNG HVVMNASSGQ PSAFTIFETA L

UniProtKB: ATP binding cassette subfamily C member 4

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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

Concentration0.6 mg/mL
BufferpH: 8 / Details: 20 mM Tris-HCL, 150 mM NaCl, 1 mM TCEP
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Atmosphere: OTHER
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV
DetailsMultidrug resistance-associated protein (MRP4) E1202Q mutant in MSP lipid nanodisc

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 4698 / Average electron dose: 66.0 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: 2.0 µm / Nominal defocus min: 0.5 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: 1448148
Startup modelType of model: OTHER / Details: Stochastic gradient descent from particle images
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 3.2) / Number images used: 80063
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: PROJECTION MATCHING

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