8ZAH

Crystal structure of the channel protein CorA from Campylobacter jejuni


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

Starting Model: in silico
View more details

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural and biochemical analysis of the unique interactions of the Campylobacter jejuni CorA channel protein with divalent cations.

Ahn, S.Y.Lee, S.J.Yoon, S.I.

(2024) Biochem Biophys Res Commun 723: 150166-150166

  • DOI: https://doi.org/10.1016/j.bbrc.2024.150166
  • Primary Citation of Related Structures:  
    8ZAH, 8ZAK

  • PubMed Abstract: 

    CorA is a Mg 2+ channel that plays a key role in the homeostasis of intracellular Mg 2+ in bacteria and archaea. CorA consists of a cytoplasmic domain and a transmembrane domain and generates a Mg 2+ pathway by forming a pentamer in the cell membrane. CorA gating is regulated via negative feedback by Mg 2+ , which is accommodated by the pentamerization interface of the CorA cytoplasmic domain (CorA CD ). The Mg 2+ -binding sites of CorA CD differ depending on the species, suggesting that the Mg 2+ -binding modes and Mg 2+ -mediated gating mechanisms of CorA vary across prokaryotes. To define the Mg 2+ -binding mechanism of CorA in the Campylobacter jejuni pathogen, we structurally and biochemically characterized C. jejuni CorA CD (cjCorA CD ). cjCorA CD adopts a three-layered α/β/α structure as observed in other CorA orthologs. Interestingly, cjCorA CD exhibited enhanced thermostability in the presence of Ca 2+ , Ni 2+ , Zn 2+ , or Mn 2+ in addition to Mg 2+ , indicating that cjCorA CD interacts with diverse divalent cations. This cjCorA CD stabilization is mediated by divalent cation accommodation by negatively charged residues located at the bottom of the cjCorA CD structure away from the pentamerization interface. Consistently, cjCorA CD exists as a monomer irrespective of the presence of divalent cations. We concluded that cjCorA CD binds divalent cations in a unique pentamerization-independent manner.


  • Organizational Affiliation

    Division of Biomedical Convergence, College of Biomedical Science, Kangwon National University, Chuncheon, 24341, Republic of Korea.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Magnesium transport protein CorA
A, B
274Campylobacter jejuniMutation(s): 0 
Gene Names: corAFPQ34_01795
UniProt
Find proteins for Q9PPI1 (Campylobacter jejuni subsp. jejuni serotype O:2 (strain ATCC 700819 / NCTC 11168))
Explore Q9PPI1 
Go to UniProtKB:  Q9PPI1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9PPI1
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.62α = 90
b = 95.62β = 90
c = 110.304γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Research Foundation (NRF, Korea)Korea, Republic OfRS-2023-00208153

Revision History  (Full details and data files)

  • Version 1.0: 2024-06-19
    Type: Initial release