5N9Y

The full-length structure of ZntB


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.2 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

The structural basis of proton driven zinc transport by ZntB.

Gati, C.Stetsenko, A.Slotboom, D.J.Scheres, S.H.W.Guskov, A.

(2017) Nat Commun 8: 1313-1313

  • DOI: 10.1038/s41467-017-01483-7

  • PubMed Abstract: 
  • Zinc is an essential microelement to sustain all forms of life. However, excess of zinc is toxic, therefore dedicated import, export and storage proteins for tight regulation of the zinc concentration have evolved. In Enterobacteriaceae, several memb ...

    Zinc is an essential microelement to sustain all forms of life. However, excess of zinc is toxic, therefore dedicated import, export and storage proteins for tight regulation of the zinc concentration have evolved. In Enterobacteriaceae, several membrane transporters are involved in zinc homeostasis and linked to virulence. ZntB has been proposed to play a role in the export of zinc, but the transport mechanism of ZntB is poorly understood and based only on experimental characterization of its distant homologue CorA magnesium channel. Here, we report the cryo-electron microscopy structure of full-length ZntB from Escherichia coli together with the results of isothermal titration calorimetry, and radio-ligand uptake and fluorescent transport assays on ZntB reconstituted into liposomes. Our results show that ZntB mediates Zn 2+ uptake, stimulated by a pH gradient across the membrane, using a transport mechanism that does not resemble the one proposed for homologous CorA channels.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge, CB2 0QH, UK.,Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands. a.guskov@rug.nl.,MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge, CB2 0QH, UK. scheres@mrc-lmb.cam.ac.uk.,Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Zinc transport protein ZntB
A, B, C, D, E
327Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: zntB (ydaN)
Find proteins for P64423 (Escherichia coli (strain K12))
Go to UniProtKB:  P64423
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
NWONetherlands723.014.002

Revision History 

  • Version 1.0: 2017-11-15
    Type: Initial release
  • Version 1.1: 2017-11-22
    Type: Database references
  • Version 1.2: 2019-10-02
    Type: Data collection, Other
  • Version 1.3: 2019-10-23
    Type: Data collection, Other