6VQR

CryoEM Structure of the PfFNT-inhibitor complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.78 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 basis of transport and inhibition of the Plasmodium falciparum transporter PfFNT.

Lyu, M.Su, C.C.Kazura, J.W.Yu, E.W.

(2021) EMBO Rep 22: e51628-e51628

  • DOI: https://doi.org/10.15252/embr.202051628
  • Primary Citation of Related Structures:  
    6VQQ, 6VQR, 7MXY

  • PubMed Abstract: 

    The intra-erythrocyte stage of P. falciparum relies primarily on glycolysis to generate adenosine triphosphate (ATP) and the energy required to support growth and reproduction. Lactic acid, a metabolic byproduct of glycolysis, is potentially toxic as it lowers the pH inside the parasite. Plasmodium falciparum formate-nitrite transporter (PfFNT), a 34-kDa transmembrane protein, has been identified as a novel drug target as it exports lactate from inside the parasite to the surrounding parasitophorous vacuole within the erythrocyte cytosol. The structure and detailed molecular mechanism of this membrane protein are not yet available. Here we present structures of PfFNT in the absence and presence of the functional inhibitor MMV007839 at resolutions of 2.56 Å and 2.78 Å using single-particle cryo-electron microscopy. Genetic analysis and transport assay indicate that PfFNT is able to transfer lactate across the membrane. Combined, our data suggest a stepwise displacement mechanism for substrate transport. The PfFNT membrane protein is capable of picking up lactate ions from the parasite's cytosol, converting them to lactic acids and then exporting these acids into the extracellular space.


  • Organizational Affiliation

    Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Formate-nitrite transporter
A, B, C, D, E
309Plasmodium falciparum 3D7Mutation(s): 0 
Gene Names: PF3D7_0316600
Membrane Entity: Yes 
UniProt
Find proteins for O77389 (Plasmodium falciparum (isolate 3D7))
Explore O77389 
Go to UniProtKB:  O77389
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO77389
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.78 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2021-02-03
    Type: Initial release
  • Version 1.1: 2021-03-17
    Changes: Database references
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references