6KFF

Undocked INX-6 hemichannel in a nanodisc


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM structures of undocked innexin-6 hemichannels in phospholipids.

Burendei, B.Shinozaki, R.Watanabe, M.Terada, T.Tani, K.Fujiyoshi, Y.Oshima, A.

(2020) Sci Adv 6: eaax3157-eaax3157

  • DOI: 10.1126/sciadv.aax3157
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Gap junctions form intercellular conduits with a large pore size whose closed and open states regulate communication between adjacent cells. The structural basis of the mechanism by which gap junctions close, however, remains uncertain. Here, we show ...

    Gap junctions form intercellular conduits with a large pore size whose closed and open states regulate communication between adjacent cells. The structural basis of the mechanism by which gap junctions close, however, remains uncertain. Here, we show the cryo-electron microscopy structures of Caenorhabditis elegans innexin-6 (INX-6) gap junction proteins in an undocked hemichannel form. In the nanodisc-reconstituted structure of the wild-type INX-6 hemichannel, flat double-layer densities obstruct the channel pore. Comparison of the hemichannel structures of a wild-type INX-6 in detergent and nanodisc-reconstituted amino-terminal deletion mutant reveals that lipid-mediated amino-terminal rearrangement and pore obstruction occur upon nanodisc reconstitution. Together with molecular dynamics simulations and electrophysiology functional assays, our results provide insight into the closure of the INX-6 hemichannel in a lipid bilayer before docking of two hemichannels.


    Organizational Affiliation

    Cellular and Structural Physiology Institute (CeSPI), Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Innexin-6A, B, C, D, E, F, G, H389Caenorhabditis elegansMutation(s): 0 
Gene Names: inx-6opu-6C36H8.2
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Gap Junctions and Related Channels
Protein: 
Innexin-6 (INX-6) gap junction hemichannel in a nanodisc
Find proteins for Q9U3N4 (Caenorhabditis elegans)
Explore Q9U3N4 
Go to UniProtKB:  Q9U3N4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Japan Agency for Medical Research and Development (AMED)Japan--
Ministry of Education, Culture, Sports, Science and Technology (Japan)Japan--
New Energy and Industrial Technology Development Organization (NEDO)Japan--

Revision History 

  • Version 1.0: 2020-02-12
    Type: Initial release
  • Version 1.1: 2020-03-11
    Changes: Database references