The Cryo-Electron Microscopy Structure of the CorA channel from Methanocaldococcus jannaschii at 21.6 Angstrom in low magnesium.

Experimental Data Snapshot

  • Resolution: 21.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.4 of the entry. See complete history


The Cryo-EM structure of the CorA channel from Methanocaldococcus jannaschii in low magnesium conditions.

Cleverley, R.M.Kean, J.Shintre, C.A.Baldock, C.Derrick, J.P.Ford, R.C.Prince, S.M.

(2015) Biochim Biophys Acta 1848: 2206-2215

  • DOI: https://doi.org/10.1016/j.bbamem.2015.06.002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    CorA channels are responsible for the uptake of essential magnesium ions by bacteria. X-ray crystal structures have been resolved for two full-length CorA channels, each in a non-conducting state with magnesium ions bound to the protein: These structures reveal a homo-pentameric quaternary structure with approximate 5-fold rotational symmetry about a central pore axis. We report the structure of the detergent solubilized Methanocaldococcus jannaschii CorA channel determined by Cryo-Electron Microscopy and Single Particle Averaging, supported by Small Angle X-ray Scattering and X-ray crystallography. This structure also shows a pentameric channel but with a highly asymmetric domain structure. The asymmetry of the domains includes differential separations between the trans-membrane segments, which reflects mechanical coupling of the cytoplasmic domain to the trans-membrane domain. This structure therefore reveals an important aspect of the gating mechanism of CorA channels by providing an indication of how the absence of magnesium ions leads to major structural changes.

  • Organizational Affiliation

    Faculty of Life Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
317Methanocaldococcus jannaschiiMutation(s): 0 
Membrane Entity: Yes 
Find proteins for Q58439 (Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440))
Explore Q58439 
Go to UniProtKB:  Q58439
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ58439
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 21.6 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-04-22
    Type: Initial release
  • Version 1.1: 2015-06-17
    Changes: Database references
  • Version 1.2: 2017-01-25
    Changes: Database references
  • Version 1.3: 2017-08-30
    Changes: Data collection, Refinement description
  • Version 1.4: 2024-05-08
    Changes: Data collection, Database references, Refinement description