4Z7F

Crystal structure of FolT bound with folic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.356 
  • R-Value Work: 0.293 
  • R-Value Observed: 0.299 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structures of FolT in substrate-bound and substrate-released conformations reveal a gating mechanism for ECF transporters

Zhao, Q.Wang, C.C.Wang, C.Y.Guo, H.Bao, Z.H.Zhang, M.H.Zhang, P.

(2015) Nat Commun 6: 7661-7661

  • DOI: https://doi.org/10.1038/ncomms8661
  • Primary Citation of Related Structures:  
    4Z7F

  • PubMed Abstract: 

    Energy-coupling factor (ECF) transporters are a new family of ABC transporters that consist of four subunits, two cytoplasmic ATPases EcfA and EcfA' and two transmembrane proteins namely EcfS for substrate-specific binding and EcfT for energy coupling. Here, we report the 3.2-Å resolution crystal structure of the EcfS protein of a folate ECF transporter from Enterococcus faecalis-EfFolT, a close homologue of FolT from Lactobacillus brevis-LbFolT. Structural and biochemical analyses reveal the residues constituting the folate-binding pocket and determining the substrate-binding specificity. Structural comparison of the folate-bound EfFolT with the folate-free LbFolT contained in the holotransporter complex discloses significant conformational change at the L1 loop, and reveals a gating mechanism of ECF transporters in which the L1 loop of EcfS acts as a gate in the substrate binding and release.


  • Organizational Affiliation

    National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Folate ECF transporter
A, B, C, D, E
A, B, C, D, E, F
199Enterococcus faecalis V583Mutation(s): 0 
Gene Names: EF_0940
Membrane Entity: Yes 
UniProt
Find proteins for Q837A3 (Enterococcus faecalis (strain ATCC 700802 / V583))
Explore Q837A3 
Go to UniProtKB:  Q837A3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ837A3
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.356 
  • R-Value Work: 0.293 
  • R-Value Observed: 0.299 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.752α = 90
b = 92.752β = 90
c = 183.445γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-29
    Type: Initial release
  • Version 1.1: 2015-08-05
    Changes: Database references
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.3: 2024-10-23
    Changes: Structure summary