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
  • Primary Citation of Related Structures:  
    2NDJ

  • 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 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 ...

    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.; Department of Medicine, Vanderbilt University Medical Center, Nashville, TN 37240, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Potassium voltage-gated channel subfamily E member 3 A112Homo sapiensMutation(s): 0 
Gene Names: KCNE3MiRP2
Find proteins for Q9Y6H6 (Homo sapiens)
Explore Q9Y6H6 
Go to UniProtKB:  Q9Y6H6
NIH Common Fund Data Resources
PHAROS:  Q9Y6H6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 9764 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2NDJ Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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