8SX9

Inward-facing narrow conformation of bovine multidrug resistance protein 4 (MRP4) in MSP lipid nanodisc


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis of prostaglandin efflux by MRP4.

Pourmal, S.Green, E.Bajaj, R.Chemmama, I.E.Knudsen, G.M.Gupta, M.Sali, A.Cheng, Y.Craik, C.S.Kroetz, D.L.Stroud, R.M.

(2024) Nat Struct Mol Biol 31: 621-632

  • DOI: https://doi.org/10.1038/s41594-023-01176-4
  • Primary Citation of Related Structures:  
    8SWN, 8SX7, 8SX8, 8SX9, 8SXA, 8SXB

  • PubMed Abstract: 

    Multidrug resistance protein 4 (MRP4) is a broadly expressed ATP-binding cassette transporter that is unique among the MRP subfamily for transporting prostanoids, a group of signaling molecules derived from unsaturated fatty acids. To better understand the basis of the substrate selectivity of MRP4, we used cryogenic-electron microscopy to determine six structures of nanodisc-reconstituted MRP4 at various stages throughout its transport cycle. Substrate-bound structures of MRP4 in complex with PGE 1 , PGE 2 and the sulfonated-sterol DHEA-S reveal a common binding site that accommodates a diverse set of organic anions and suggest an allosteric mechanism for substrate-induced enhancement of MRP4 ATPase activity. Our structure of a catalytically compromised MRP4 mutant bound to ATP-Mg 2+ is outward-occluded, a conformation previously unobserved in the MRP subfamily and consistent with an alternating-access transport mechanism. Our study provides insights into the endogenous function of this versatile efflux transporter and establishes a basis for MRP4-targeted drug design.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco, CA, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Multidrug resistance-associated protein 41,325Bos taurusMutation(s): 0 
Gene Names: LOC515333
Membrane Entity: Yes 
UniProt
Find proteins for F1MUC1 (Bos taurus)
Explore F1MUC1 
Go to UniProtKB:  F1MUC1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupF1MUC1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC3.2

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM24485

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-17
    Type: Initial release
  • Version 1.1: 2024-01-24
    Changes: Database references
  • Version 1.2: 2024-03-13
    Changes: Data collection, Database references, Structure summary
  • Version 1.3: 2024-05-01
    Changes: Database references