6ETI

Structure of inhibitor-bound ABCG2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Structural basis of small-molecule inhibition of human multidrug transporter ABCG2.

Jackson, S.M.Manolaridis, I.Kowal, J.Zechner, M.Taylor, N.M.I.Bause, M.Bauer, S.Bartholomaeus, R.Bernhardt, G.Koenig, B.Buschauer, A.Stahlberg, H.Altmann, K.H.Locher, K.P.

(2018) Nat Struct Mol Biol 25: 333-340

  • DOI: 10.1038/s41594-018-0049-1
  • Primary Citation of Related Structures:  
    6ETI, 6FEQ, 6FFC, 6HIJ

  • PubMed 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 and modulators of ABCG2 have been developed, understanding their structure-activity relationship requires high-resolution structural insight ...

    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.


    Organizational Affiliation

    Institute of Molecular Biology and Biophysics, Department of Biology, ETH Zurich, Zurich, Switzerland. locher@mol.biol.ethz.ch.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-binding cassette sub-family G member 2A, B655Homo sapiensMutation(s): 0 
Gene Names: ABCG2ABCPBCRPBCRP1MXR
EC: 7.6.2.2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UNQ0 (Homo sapiens)
Explore Q9UNQ0 
Go to UniProtKB:  Q9UNQ0
PHAROS:  Q9UNQ0
Entity Groups  
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UniProt GroupQ9UNQ0
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
5D3(Fab) light chain variable domainC, E214Mus musculusMutation(s): 0 
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
5D3(Fab) heavy chain variable domainD, F221Mus musculusMutation(s): 0 
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Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranoseG, H 2N-Glycosylation Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BWQ (Subject of Investigation/LOI)
Query on BWQ

Download Ideal Coordinates CCD File 
I [auth A],
J [auth B]
~{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
C30 H41 N3 O5
MVNIRJAHJUCHLD-HVCNVCAESA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swiss National Science Foundation, National Centre of Competence in Research (NCCR) TransCureSwitzerland--
Swiss Federal Institute of Technology Zurich (ETH Zurich)SwitzerlandETH-22-14-1

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-11
    Type: Initial release
  • Version 1.1: 2018-04-18
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-11
    Changes: Other
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary