4PGS

Crystal structure of YetJ from Bacillus Subtilis at pH 6 by soaking


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for a pH-sensitive calcium leak across membranes.

Chang, Y.Bruni, R.Kloss, B.Assur, Z.Kloppmann, E.Rost, B.Hendrickson, W.A.Liu, Q.

(2014) Science 344: 1131-1135

  • DOI: 10.1126/science.1252043
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Calcium homeostasis balances passive calcium leak and active calcium uptake. Human Bax inhibitor-1 (hBI-1) is an antiapoptotic protein that mediates a calcium leak and is representative of a highly conserved and widely distributed family, the transme ...

    Calcium homeostasis balances passive calcium leak and active calcium uptake. Human Bax inhibitor-1 (hBI-1) is an antiapoptotic protein that mediates a calcium leak and is representative of a highly conserved and widely distributed family, the transmembrane Bax inhibitor motif (TMBIM) proteins. Here, we present crystal structures of a bacterial homolog and characterize its calcium leak activity. The structure has a seven-transmembrane-helix fold that features two triple-helix sandwiches wrapped around a central C-terminal helix. Structures obtained in closed and open conformations are reversibly interconvertible by change of pH. A hydrogen-bonded, pKa (where Ka is the acid dissociation constant)-perturbed pair of conserved aspartate residues explains the pH dependence of this transition, and biochemical studies show that pH regulates calcium influx in proteoliposomes. Homology models for hBI-1 provide insights into TMBIM-mediated calcium leak and cytoprotective activity.


    Organizational Affiliation

    New York Consortium on Membrane Protein Structure, New York Structural Biology Center, New York, NY 10027, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein YetJ
A
217Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: yetJ
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Calcium Ion-Selective
Protein: 
YetJ pH-sensitive calcium-leak channel, pH 8 (closed form)
Find proteins for O31539 (Bacillus subtilis (strain 168))
Go to UniProtKB:  O31539
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.235 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 61.833α = 90.00
b = 61.833β = 90.00
c = 276.303γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-04
    Type: Initial release
  • Version 1.1: 2014-06-18
    Type: Database references