2NDJ

Structural Basis for KCNE3 and Estrogen Modulation of the KCNQ1 Channel


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 9764 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for KCNE3 modulation of potassium recycling in epithelia.

Kroncke, B.M.Van Horn, W.D.Smith, J.Kang, C.Welch, R.C.Song, Y.Nannemann, D.P.Taylor, K.C.Sisco, N.J.George, A.L.Meiler, J.Vanoye, C.G.Sanders, C.R.

(2016) Sci Adv 2: e1501228-e1501228

  • DOI: 10.1126/sciadv.1501228

  • PubMed Abstract: 
  • The single-span membrane protein KCNE3 modulates a variety of voltage-gated ion channels in diverse biological contexts. In epithelial cells, KCNE3 regulates the function of the KCNQ1 potassium ion (K(+)) channel to enable K(+) recycling coupled to t ...

    The single-span membrane protein KCNE3 modulates a variety of voltage-gated ion channels in diverse biological contexts. In epithelial cells, KCNE3 regulates the function of the KCNQ1 potassium ion (K(+)) channel to enable K(+) recycling coupled to transepithelial chloride ion (Cl(-)) secretion, a physiologically critical cellular transport process in various organs and whose malfunction causes diseases, such as cystic fibrosis (CF), cholera, and pulmonary edema. Structural, computational, biochemical, and electrophysiological studies lead to an atomically explicit integrative structural model of the KCNE3-KCNQ1 complex that explains how KCNE3 induces the constitutive activation of KCNQ1 channel activity, a crucial component in K(+) recycling. Central to this mechanism are direct interactions of KCNE3 residues at both ends of its transmembrane domain with residues on the intra- and extracellular ends of the KCNQ1 voltage-sensing domain S4 helix. These interactions appear to stabilize the activated "up" state configuration of S4, a prerequisite for full opening of the KCNQ1 channel gate. In addition, the integrative structural model was used to guide electrophysiological studies that illuminate the molecular basis for how estrogen exacerbates CF lung disease in female patients, a phenomenon known as the "CF gender gap."


    Organizational Affiliation

    Department of Biochemistry, Vanderbilt University, Nashville, TN 37240, USA.; Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Potassium voltage-gated channel subfamily E member 3
A
112Homo sapiensGene Names: KCNE3
Find proteins for Q9Y6H6 (Homo sapiens)
Go to Gene View: KCNE3
Go to UniProtKB:  Q9Y6H6
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 9764 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-09-21
    Type: Initial release
  • Version 1.1: 2017-12-20
    Type: Database references