3M73

Crystal Structure of Plant SLAC1 homolog TehA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.15 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.141 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Homologue structure of the SLAC1 anion channel for closing stomata in leaves.

Chen, Y.H.Hu, L.Punta, M.Bruni, R.Hillerich, B.Kloss, B.Rost, B.Love, J.Siegelbaum, S.A.Hendrickson, W.A.

(2010) Nature 467: 1074-1080

  • DOI: 10.1038/nature09487
  • Primary Citation of Related Structures:  3M71, 3M74, 3M75, 3M76, 3M7L

  • PubMed Abstract: 
  • The plant SLAC1 anion channel controls turgor pressure in the aperture-defining guard cells of plant stomata, thereby regulating the exchange of water vapour and photosynthetic gases in response to environmental signals such as drought or high levels ...

    The plant SLAC1 anion channel controls turgor pressure in the aperture-defining guard cells of plant stomata, thereby regulating the exchange of water vapour and photosynthetic gases in response to environmental signals such as drought or high levels of carbon dioxide. Here we determine the crystal structure of a bacterial homologue (Haemophilus influenzae) of SLAC1 at 1.20 Å resolution, and use structure-inspired mutagenesis to analyse the conductance properties of SLAC1 channels. SLAC1 is a symmetrical trimer composed from quasi-symmetrical subunits, each having ten transmembrane helices arranged from helical hairpin pairs to form a central five-helix transmembrane pore that is gated by an extremely conserved phenylalanine residue. Conformational features indicate a mechanism for control of gating by kinase activation, and electrostatic features of the pore coupled with electrophysiological characteristics indicate that selectivity among different anions is largely a function of the energetic cost of ion dehydration.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10032, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tellurite resistance protein tehA homolog
A
314Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd)Gene Names: tehA
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Other Ion Channels
Protein: 
SLAC1 anion channel, TehA homolog (wild-type)
Find proteins for P44741 (Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd))
Go to UniProtKB:  P44741
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BOG
Query on BOG

Download SDF File 
Download CCD File 
A
B-OCTYLGLUCOSIDE
C14 H28 O6
HEGSGKPQLMEBJL-RKQHYHRCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.15 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.141 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 95.535α = 90.00
b = 95.535β = 90.00
c = 135.990γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
HKL-2000data scaling
SCALEPACKdata scaling
DENZOdata reduction
HKL-2000data reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-05-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-08
    Type: Advisory, Refinement description