1LSU

KTN Bsu222 Crystal Structure in Complex with NADH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.279 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

A mechanism of regulating transmembrane potassium flux through a ligand-mediated conformational switch.

Roosild, T.P.Miller, S.Booth, I.R.Choe, S.

(2002) Cell 109: 781-791

  • Primary Citation of Related Structures:  1LSS

  • PubMed Abstract: 
  • The regulation of cation content is critical for cell growth. However, the molecular mechanisms that gate the systems that control K+ movements remain unclear. KTN is a highly conserved cytoplasmic domain present ubiquitously in a variety of prokaryo ...

    The regulation of cation content is critical for cell growth. However, the molecular mechanisms that gate the systems that control K+ movements remain unclear. KTN is a highly conserved cytoplasmic domain present ubiquitously in a variety of prokaryotic and eukaryotic K+ channels and transporters. Here we report crystal structures for two representative KTN domains that reveal a dimeric hinged assembly. Alternative ligands NAD+ and NADH block or vacate, respectively, the hinge region affecting the dimer's conformational flexibility. Conserved, surface-exposed hydrophobic patches that become coplanar upon hinge closure provide an assembly interface for KTN tetramerization. Mutational analysis using the KefC system demonstrates that this domain directly interacts with its respective transmembrane constituent, coupling ligand-mediated KTN conformational changes to the permease's activity.


    Organizational Affiliation

    Structural Biology Laboratory, Salk Institute and Division of Biology, University of California, San Diego, 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Conserved hypothetical protein yuaA
A, B
147Bacillus subtilis (strain 168)Gene Names: ktrA (yuaA)
Find proteins for O32080 (Bacillus subtilis (strain 168))
Go to UniProtKB:  O32080
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAI
Query on NAI

Download SDF File 
Download CCD File 
A, B
1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE
NADH
C21 H29 N7 O14 P2
BOPGDPNILDQYTO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.329 
  • R-Value Work: 0.279 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 126.600α = 90.00
b = 126.600β = 90.00
c = 98.700γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-07-03
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2014-11-12
    Type: Structure summary