6QEE

Nanodisc reconstituted Human-mouse chimeric ABCB1 (ABCB1HM)-EQ mutant in complex with UIC2 Fab and Zosuquidar.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural insight into substrate and inhibitor discrimination by human P-glycoprotein.

Alam, A.Kowal, J.Broude, E.Roninson, I.Locher, K.P.

(2019) Science 363: 753-756

  • DOI: 10.1126/science.aav7102
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • ABCB1, also known as P-glycoprotein, actively extrudes xenobiotic compounds across the plasma membrane of diverse cells, which contributes to cellular drug resistance and interferes with therapeutic drug delivery. We determined the 3.5-angstrom cryo- ...

    ABCB1, also known as P-glycoprotein, actively extrudes xenobiotic compounds across the plasma membrane of diverse cells, which contributes to cellular drug resistance and interferes with therapeutic drug delivery. We determined the 3.5-angstrom cryo-electron microscopy structure of substrate-bound human ABCB1 reconstituted in lipidic nanodiscs, revealing a single molecule of the chemotherapeutic compound paclitaxel (Taxol) bound in a central, occluded pocket. A second structure of inhibited, human-mouse chimeric ABCB1 revealed two molecules of zosuquidar occupying the same drug-binding pocket. Minor structural differences between substrate- and inhibitor-bound ABCB1 sites are amplified toward the nucleotide-binding domains (NBDs), revealing how the plasticity of the drug-binding site controls the dynamics of the adenosine triphosphate-hydrolyzing NBDs. Ordered cholesterol and phospholipid molecules suggest how the membrane modulates the conformational changes associated with drug binding and transport.


    Organizational Affiliation

    Institute of Molecular Biology and Biophysics, ETH Zürich, Otto-Stern-Weg 5, 8093 Zürich, Switzerland. locher@mol.biol.ethz.ch.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ABCB1HM-EQA1300Homo sapiensMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
UIC2 Antigen Binding Fragment Light chainB220Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
UIC2 Antigen Binding Fragment Heavy ChainC225Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3PE
Query on 3PE

Download CCD File 
A
1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE
C41 H82 N O8 P
LVNGJLRDBYCPGB-LDLOPFEMSA-N
 Ligand Interaction
ZQU
Query on ZQU

Download CCD File 
A
Zosuquidar
C32 H31 F2 N3 O2
IHOVFYSQUDPMCN-DBEBIPAYSA-N
 Ligand Interaction
CLR
Query on CLR

Download CCD File 
A
CHOLESTEROL
C27 H46 O
HVYWMOMLDIMFJA-DPAQBDIFSA-N
 Ligand Interaction
NAG
Query on NAG

Download CCD File 
A
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-01-07 
  • Released Date: 2019-02-27 
  • Deposition Author(s): Alam, A.

Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland--
European Molecular Biology OrganizationSwitzerland--

Revision History 

  • Version 1.0: 2019-02-27
    Type: Initial release
  • Version 1.1: 2019-12-18
    Changes: Other
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary