Cryo-EM structure of ATP-bound, outward-facing bovine multidrug resistance protein 1 (MRP1)

Experimental Data Snapshot

  • Resolution: 3.14 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

This is version 1.6 of the entry. See complete history


ATP Binding Enables Substrate Release from Multidrug Resistance Protein 1.

Johnson, Z.L.Chen, J.

(2018) Cell 172: 81-89.e10

  • DOI: https://doi.org/10.1016/j.cell.2017.12.005
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The multidrug resistance protein MRP1 is an ATP-driven pump that confers resistance to chemotherapy. Previously, we have shown that intracellular substrates are recruited to a bipartite binding site when the transporter rests in an inward-facing conformation. A key question remains: how are high-affinity substrates transferred across the membrane and released outside the cell? Using electron cryomicroscopy, we show here that ATP binding opens the transport pathway to the extracellular space and reconfigures the substrate-binding site such that it relinquishes its affinity for substrate. Thus, substrate is released prior to ATP hydrolysis. With this result, we now have a complete description of the conformational cycle that enables substrate transfer in a eukaryotic ABC exporter.

  • Organizational Affiliation

    Laboratory of Membrane Biology and Biophysics, The Rockefeller University and Howard Hughes Medical Institute, New York, NY 10065, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Multidrug resistance-associated protein 11,659Bos taurusMutation(s): 1 
Gene Names: ABCC1MRP1
Membrane Entity: Yes 
Find proteins for Q8HXQ5 (Bos taurus)
Explore Q8HXQ5 
Go to UniProtKB:  Q8HXQ5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8HXQ5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.14 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
The Rockefeller UniversityUnited States--
Jane Coffin Childs Memorial Fund for Medical ResearchUnited States--

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-27
    Type: Initial release
  • Version 1.1: 2018-01-17
    Changes: Database references
  • Version 1.2: 2018-01-24
    Changes: Database references
  • Version 1.3: 2018-10-03
    Changes: Data collection, Refinement description
  • Version 1.4: 2019-11-20
    Changes: Author supporting evidence
  • Version 1.5: 2019-12-18
    Changes: Other
  • Version 1.6: 2024-03-13
    Changes: Data collection, Database references