Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Predict Membrane 

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 14.49 kDa 
• Atom Count: 1019 
• Modelled Residue Count: 123 
• Deposited Residue Count: 123 
• Unique protein chains: 1

2M0Q

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

• PDB DOI: 10.2210/pdb2M0Q/pdb
• BMRB: 18817

• Classification: MEMBRANE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  OPMPDBTM


• Deposited: 2012-11-01 Released: 2014-04-30 
• Deposition Author(s): Lai, C., Li, P., Chen, L., Zhang, L., Wu, F., Tian, C.

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Experimental Data Snapshot

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

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

• PubMed: 24827085 
• 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. 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.

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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

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Potassium voltage-gated channel subfamily E member 2	A	123	Homo sapiens	Mutation(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

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

Entry History 

Deposition Data

• Deposited Date: 2012-11-01 
• Released Date: 2014-04-30 
Deposition Author(s): Lai, C., Li, P., Chen, L., Zhang, L., Wu, F., Tian, C.

Revision History  

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