6ETI

Structure of inhibitor-bound ABCG2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 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:  

  • 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, underst ...

    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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-binding cassette sub-family G member 2
A, B
655Homo sapiensMutation(s): 0 
Gene Names: ABCG2 (ABCP, BCRP, BCRP1, MXR)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
Multidrug transporter ABCG2
Find proteins for Q9UNQ0 (Homo sapiens)
Go to Gene View: ABCG2
Go to UniProtKB:  Q9UNQ0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
5D3(Fab) light chain variable domain
C, E
214N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
5D3(Fab) heavy chain variable domain
D, F
221N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BWQ
Query on BWQ

Download SDF File 
Download CCD File 
A, 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
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.1 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



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 

  • Version 1.0: 2018-04-11
    Type: Initial release
  • Version 1.1: 2018-04-18
    Type: Data collection, Database references