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- EMDB-4256: Structure of an inhibitor-bound ABC transporter -

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Basic information

Entry
Database: EMDB / ID: EMD-4256
TitleStructure of an inhibitor-bound ABC transporter
Map data
Sample
  • Complex: Nanodisc-reconstituted ABCG2 in complex with MZ29 inhibitor
    • Protein or peptide: ATP-binding cassette sub-family G member 2
  • Ligand: ~{tert}-butyl 3-[(2~{S},5~{S},8~{S})-14-cyclopentyloxy-2-(2-methylpropyl)-4,7-bis(oxidanylidene)-3,6,17-triazatetracyclo[8.7.0.0^{3,8}.0^{11,16}]heptadeca-1(10),11,13,15-tetraen-5-yl]propanoate
KeywordsABC transporter / transport protein
Function / homology
Function and homology information


biotin transmembrane transporter activity / biotin transport / riboflavin transport / riboflavin transmembrane transporter activity / sphingolipid transporter activity / renal urate salt excretion / urate metabolic process / Abacavir transmembrane transport / urate transmembrane transporter activity / sphingolipid biosynthetic process ...biotin transmembrane transporter activity / biotin transport / riboflavin transport / riboflavin transmembrane transporter activity / sphingolipid transporter activity / renal urate salt excretion / urate metabolic process / Abacavir transmembrane transport / urate transmembrane transporter activity / sphingolipid biosynthetic process / Sphingolipid de novo biosynthesis / organic anion transport / external side of apical plasma membrane / organic anion transmembrane transporter activity / xenobiotic transport across blood-brain barrier / transepithelial transport / Ciprofloxacin ADME / export across plasma membrane / Paracetamol ADME / NFE2L2 regulating MDR associated enzymes / ABC-type xenobiotic transporter / Differentiation of Keratinocytes in Interfollicular Epidermis in Mammalian Skin / Heme biosynthesis / cellular detoxification / ABC-type xenobiotic transporter activity / Heme degradation / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / ATPase-coupled transmembrane transporter activity / transport across blood-brain barrier / brush border membrane / Iron uptake and transport / mitochondrial membrane / transmembrane transport / apical plasma membrane / membrane raft / protein homodimerization activity / ATP hydrolysis activity / nucleoplasm / ATP binding / identical protein binding / plasma membrane
Similarity search - Function
ABC transporter family G domain / ABC-2 type transporter / : / ABC-2 type transporter / ABC-2 type transporter / 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
Broad substrate specificity ATP-binding cassette transporter ABCG2
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.56 Å
AuthorsJackson SM / Manolaridis I
Funding support Switzerland, 2 items
OrganizationGrant numberCountry
SNSF NCCR TransCure Switzerland
ETH ZurichETH-22-14-1 Switzerland
CitationJournal: Nat Struct Mol Biol / Year: 2018
Title: Structural basis of small-molecule inhibition of human multidrug transporter ABCG2.
Authors: Scott M Jackson / Ioannis Manolaridis / Julia Kowal / Melanie Zechner / Nicholas M I Taylor / Manuel Bause / Stefanie Bauer / Ruben Bartholomaeus / Guenther Bernhardt / Burkhard Koenig / ...Authors: Scott M Jackson / Ioannis Manolaridis / Julia Kowal / Melanie Zechner / Nicholas M I Taylor / Manuel Bause / Stefanie Bauer / Ruben Bartholomaeus / Guenther Bernhardt / Burkhard Koenig / Armin Buschauer / Henning Stahlberg / Karl-Heinz Altmann / Kaspar P Locher /
Abstract: ABCG2 is an ATP-binding cassette (ABC) transporter that protects tissues against xenobiotics, affects the pharmacokinetics of drugs and contributes to multidrug resistance. Although many inhibitors ...ABCG2 is an ATP-binding cassette (ABC) transporter that protects tissues against xenobiotics, affects the pharmacokinetics of drugs and contributes to multidrug resistance. Although many inhibitors and modulators of ABCG2 have been developed, understanding their structure-activity relationship requires high-resolution structural insight. Here, we present cryo-EM structures of human ABCG2 bound to synthetic derivatives of the fumitremorgin C-related inhibitor Ko143 or the multidrug resistance modulator tariquidar. Both compounds are bound to the central, inward-facing cavity of ABCG2, blocking access for substrates and preventing conformational changes required for ATP hydrolysis. The high resolutions allowed for de novo building of the entire transporter and also revealed tightly bound phospholipids and cholesterol interacting with the lipid-exposed surface of the transmembrane domains (TMDs). Extensive chemical modifications of the Ko143 scaffold combined with in vitro functional analyses revealed the details of ABCG2 interactions with this compound family and provide a basis for the design of novel inhibitors and modulators.
History
DepositionJan 6, 2018-
Header (metadata) releaseFeb 7, 2018-
Map releaseApr 11, 2018-
UpdateNov 20, 2024-
Current statusNov 20, 2024Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.022
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.022
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6ffc
  • Surface level: 0.022
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6hij
  • Surface level: 0.022
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_4256.png

Downloads & links

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Map

FileDownload / File: emd_4256.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.81 Å/pix.
x 320 pix.
= 259.84 Å		0.81 Å/pix.
x 320 pix.
= 259.84 Å		0.81 Å/pix.
x 320 pix.
= 259.84 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.812 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.022 / Movie #1: 0.022
Minimum - Maximum-0.1264617 - 0.20893164
Average (Standard dev.)0.00036898628 (±0.0045361384)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 259.84 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.8120.8120.812
M x/y/z320320320
origin x/y/z0.0000.0000.000
length x/y/z259.840259.840259.840
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS320320320
D min/max/mean-0.1260.2090.000

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Supplemental data

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Sample components

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Entire : Nanodisc-reconstituted ABCG2 in complex with MZ29 inhibitor

EntireName: Nanodisc-reconstituted ABCG2 in complex with MZ29 inhibitor
Components
  • Complex: Nanodisc-reconstituted ABCG2 in complex with MZ29 inhibitor
    • Protein or peptide: ATP-binding cassette sub-family G member 2
  • Ligand: ~{tert}-butyl 3-[(2~{S},5~{S},8~{S})-14-cyclopentyloxy-2-(2-methylpropyl)-4,7-bis(oxidanylidene)-3,6,17-triazatetracyclo[8.7.0.0^{3,8}.0^{11,16}]heptadeca-1(10),11,13,15-tetraen-5-yl]propanoate

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Supramolecule #1: Nanodisc-reconstituted ABCG2 in complex with MZ29 inhibitor

SupramoleculeName: Nanodisc-reconstituted ABCG2 in complex with MZ29 inhibitor
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: ATP-binding cassette sub-family G member 2

MacromoleculeName: ATP-binding cassette sub-family G member 2 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 73.395742 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DYKDDDDKGS SSSNVEVFIP VSQGNTNGFP ATASNDLKAF TEGAVLSFHN ICYRVKLKSG FLPCRKPVEK EILSNINGIM KPGLNAILG PTGGGKSSLL DVLAARKDPS GLSGDVLING APRPANFKCN SGYVVQDDVV MGTLTVRENL QFSAALRLAT T MTNHEKNE ...String:
DYKDDDDKGS SSSNVEVFIP VSQGNTNGFP ATASNDLKAF TEGAVLSFHN ICYRVKLKSG FLPCRKPVEK EILSNINGIM KPGLNAILG PTGGGKSSLL DVLAARKDPS GLSGDVLING APRPANFKCN SGYVVQDDVV MGTLTVRENL QFSAALRLAT T MTNHEKNE RINRVIQELG LDKVADSKVG TQFIRGVSGG ERKRTSIGME LITDPSILFL DEPTTGLDSS TANAVLLLLK RM SKQGRTI IFSIHQPRYS IFKLFDSLTL LASGRLMFHG PAQEALGYFE SAGYHCEAYN NPADFFLDII NGDSTAVALN REE DFKATE IIEPSKQDKP LIEKLAEIYV NSSFYKETKA ELHQLSGGEK KKKITVFKEI SYTTSFCHQL RWVSKRSFKN LLGN PQASI AQIIVTVVLG LVIGAIYFGL KNDSTGIQNR AGVLFFLTTN QCFSSVSAVE LFVVEKKLFI HEYISGYYRV SSYFL GKLL SDLLPMRMLP SIIFTCIVYF MLGLKPKADA FFVMMFTLMM VAYSASSMAL AIAAGQSVVS VATLLMTICF VFMMIF SGL LVNLTTIASW LSWLQYFSIP RYGFTALQHN EFLGQNFCPG LNATGNNPCN YATCTGEEYL VKQGIDLSPW GLWKNHV AL ACMIVIFLTI AYLKLLFLKK YS

UniProtKB: Broad substrate specificity ATP-binding cassette transporter ABCG2

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Macromolecule #2: ~{tert}-butyl 3-[(2~{S},5~{S},8~{S})-14-cyclopentyloxy-2-(2-methy...

MacromoleculeName: ~{tert}-butyl 3-[(2~{S},5~{S},8~{S})-14-cyclopentyloxy-2-(2-methylpropyl)-4,7-bis(oxidanylidene)-3,6,17-triazatetracyclo[8.7.0.0^{3,8}.0^{11,16}]heptadeca-1(10),11,13,15-tetraen-5-yl]propanoate
type: ligand / ID: 2 / Number of copies: 2 / Formula: BWQ
Molecular weightTheoretical: 523.664 Da
Chemical component information

ChemComp-BWQ:
~{tert}-butyl 3-[(2~{S},5~{S},8~{S})-14-cyclopentyloxy-2-(2-methylpropyl)-4,7-bis(oxidanylidene)-3,6,17-triazatetracyclo[8.7.0.0^{3,8}.0^{11,16}]heptadeca-1(10),11,13,15-tetraen-5-yl]propanoate

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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

Concentration0.4 mg/mL
BufferpH: 7.5
VitrificationCryogen name: ETHANE-PROPANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: GIF Quantum LS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Digitization - Frames/image: 2-50 / Average electron dose: 100.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 2098186
Startup modelType of model: OTHER
Final reconstructionApplied symmetry - Point group: C2 (2 fold cyclic) / Resolution.type: BY AUTHOR / Resolution: 3.56 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 402348
Initial angle assignmentType: PROJECTION MATCHING / Software - Name: RELION
Final angle assignmentType: PROJECTION MATCHING / Software - Name: RELION
Final 3D classificationSoftware - Name: RELION
FSC plot (resolution estimation)

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