3RKG

Structural and Functional Characterization of the Yeast Mg2+ Channel Mrs2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and functional characterization of the N-terminal domain of the yeast Mg(2+) channel Mrs2.

Khan, M.B.Sponder, G.Sjoblom, B.Svidova, S.Schweyen, R.J.Carugo, O.Djinovic-Carugo, K.

(2013) Acta Crystallogr.,Sect.D 69: 1653-1664

  • DOI: 10.1107/S0907444913011712

  • PubMed Abstract: 
  • Mg(2+) translocation across cellular membranes is crucial for a myriad of physiological processes. Eukaryotic Mrs2 transporters are distantly related to the major bacterial Mg(2+) transporter CorA, the structure of which displays a bundle of giant α- ...

    Mg(2+) translocation across cellular membranes is crucial for a myriad of physiological processes. Eukaryotic Mrs2 transporters are distantly related to the major bacterial Mg(2+) transporter CorA, the structure of which displays a bundle of giant α-helices forming a long pore that extends beyond the membrane before widening into a funnel-shaped cytosolic domain. Here, a functional and structural analysis of the regulatory domain of the eukaryotic Mg(2+) channel Mrs2 from the yeast inner mitochondrial membrane is presented using crystallography, genetics, biochemistry and fluorescence spectroscopy. Surprisingly, the fold of the Mrs2 regulatory domain bears notable differences compared with the related bacterial channel CorA. Nevertheless, structural analysis showed that analogous residues form functionally critical sites, notably the hydrophobic gate and the Mg(2+)-sensing site. Validation of candidate residues was performed by functional studies of mutants in isolated yeast mitochondria. Measurements of the Mg(2+) influx into mitochondria confirmed the involvement of Met309 as the major gating residue in Mrs2, corresponding to Met291 in CorA.


    Organizational Affiliation

    Department of Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, Vienna, Austria.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Magnesium transporter MRS2, mitochondrial
A
261Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MRS2
Find proteins for Q01926 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: MRS2
Go to UniProtKB:  Q01926
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.28 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.880α = 90.00
b = 61.880β = 90.00
c = 85.450γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
XSCALEdata scaling
XDSdata reduction
PHENIXrefinement
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-18
    Type: Initial release
  • Version 1.1: 2013-09-18
    Type: Database references