2M0Q

Solution NMR analysis of intact KCNE2 in detergent micelles demonstrate a straight transmembrane helix


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • 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

Differential modulations of KCNQ1 by auxiliary proteins KCNE1 and KCNE2.

Li, P.Liu, H.Lai, C.Sun, P.Zeng, W.Wu, F.Zhang, L.Wang, S.Tian, C.Ding, J.

(2014) Sci Rep 4: 4973-4973

  • DOI: 10.1038/srep04973
  • Primary Citation of Related Structures:  
    2M0Q

  • PubMed Abstract: 
  • KCNQ1 channels play vital roles in cardiovascular, gastric and other systems. The conductance and dynamics of KCNQ1 could be modulated by different single transmembrane helical auxiliary proteins (such as KCNE1, KCNE2 and others). In this study, detail KCNQ1 function modulations by different regions of KCNE1 or KCNE2 were examined using combinational methods of electrophysiology, immunofluorescence, solution NMR and related backbone flexibility analysis ...

    KCNQ1 channels play vital roles in cardiovascular, gastric and other systems. The conductance and dynamics of KCNQ1 could be modulated by different single transmembrane helical auxiliary proteins (such as KCNE1, KCNE2 and others). In this study, detail KCNQ1 function modulations by different regions of KCNE1 or KCNE2 were examined using combinational methods of electrophysiology, immunofluorescence, solution NMR and related backbone flexibility analysis. In the presence of KCNE2 N-terminus, decreased surface expression and consequent low activities of KCNQ1 were observed. The transmembrane domains (TMDs) of KCNE1 and KCNE2 were illustrated to associate with the KCNQ1 channel in different modes: Ile64 in KCNE2-TMD interacting with Phe340 and Phe275 in KCNQ1, while two pairs of interacting residues (Phe340-Thr58 and Ala244-Tyr65) in the KCNQ1/KCNE1 complex. The KCNE1 C-terminus could modulate gating property of KCNQ1, whereas KCNE2 C-terminus had only minimal influences on KCNQ1. All of the results demonstrated different KCNQ1 function modulations by different regions of the two auxiliary proteins.


    Organizational Affiliation

    Key laboratory of Molecular Biophysics of the Ministry of Education College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P, R. China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Potassium voltage-gated channel subfamily E member 2A123Homo sapiensMutation(s): 0 
Gene Names: KCNE2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y6J6 (Homo sapiens)
Explore Q9Y6J6 
Go to UniProtKB:  Q9Y6J6
PHAROS:  Q9Y6J6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y6J6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2M0Q Olderado

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-30
    Type: Initial release
  • Version 1.1: 2021-11-17
    Changes: Data collection, Database references