7BC6

Cryo-EM structure of the outward open proton coupled folate transporter at pH 7.5


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural basis of antifolate recognition and transport by PCFT.

Parker, J.L.Deme, J.C.Kuteyi, G.Wu, Z.Huo, J.Goldman, I.D.Owens, R.J.Biggin, P.C.Lea, S.M.Newstead, S.

(2021) Nature 595: 130-134

  • DOI: https://doi.org/10.1038/s41586-021-03579-z
  • Primary Citation of Related Structures:  
    7BC6, 7BC7

  • PubMed Abstract: 

    Folates (also known as vitamin B9) have a critical role in cellular metabolism as the starting point in the synthesis of nucleic acids, amino acids and the universal methylating agent S-adenylsmethionine 1,2 . Folate deficiency is associated with a number of developmental, immune and neurological disorders 3-5 . Mammals cannot synthesize folates de novo; several systems have therefore evolved to take up folates from the diet and distribute them within the body 3,6 . The proton-coupled folate transporter (PCFT) (also known as SLC46A1) mediates folate uptake across the intestinal brush border membrane and the choroid plexus 4,7 , and is an important route for the delivery of antifolate drugs in cancer chemotherapy 8-10 . How PCFT recognizes folates or antifolate agents is currently unclear. Here we present cryo-electron microscopy structures of PCFT in a substrate-free state and in complex with a new-generation antifolate drug (pemetrexed). Our results provide a structural basis for understanding antifolate recognition and provide insights into the pH-regulated mechanism of folate transport mediated by PCFT.


  • Organizational Affiliation

    Department of Biochemistry, University of Oxford, Oxford, UK. joanne.parker@bioch.ox.ac.uk.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Proton-coupled folate transporter480Gallus gallusMutation(s): 0 
Gene Names: PCFT
Membrane Entity: Yes 
UniProt
Find proteins for F1NJ67 (Gallus gallus)
Explore F1NJ67 
Go to UniProtKB:  F1NJ67
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupF1NJ67
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
nanobody123Lama glamaMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom210536
Wolfson FoundationUnited KingdomWL160052
Wellcome TrustUnited Kingdom209194
Wellcome TrustUnited Kingdom100298
Engineering and Physical Sciences Research CouncilUnited KingdomEP/L000253/1
Wellcome TrustUnited Kingdom219531
Wellcome TrustUnited Kingdom215519
Medical Research Council (MRC, United Kingdom)United KingdomMR/M011984/1
Medical Research Council (MRC, United Kingdom)United KingdomMR/S021043/1
Wellcome TrustUnited Kingdom203741

Revision History  (Full details and data files)

  • Version 1.0: 2021-05-12
    Type: Initial release
  • Version 1.1: 2021-06-09
    Changes: Database references
  • Version 1.2: 2021-07-07
    Changes: Database references
  • Version 1.3: 2021-07-14
    Changes: Database references
  • Version 1.4: 2021-08-11
    Changes: Database references