6VXP

Cryo-EM structure of Arabidopsis thaliana MSL1 in lipid nanodisc


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.39 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural mechanism for gating of a eukaryotic mechanosensitive channel of small conductance.

Deng, Z.Maksaev, G.Schlegel, A.M.Zhang, J.Rau, M.Fitzpatrick, J.A.J.Haswell, E.S.Yuan, P.

(2020) Nat Commun 11: 3690-3690

  • DOI: https://doi.org/10.1038/s41467-020-17538-1
  • Primary Citation of Related Structures:  
    6VXM, 6VXN, 6VXP

  • PubMed Abstract: 

    Mechanosensitive ion channels transduce physical force into electrochemical signaling that underlies an array of fundamental physiological processes, including hearing, touch, proprioception, osmoregulation, and morphogenesis. The mechanosensitive channels of small conductance (MscS) constitute a remarkably diverse superfamily of channels critical for management of osmotic pressure. Here, we present cryo-electron microscopy structures of a MscS homolog from Arabidopsis thaliana, MSL1, presumably in both the closed and open states. The heptameric MSL1 channel contains an unusual bowl-shaped transmembrane region, which is reminiscent of the evolutionarily and architecturally unrelated mechanosensitive Piezo channels. Upon channel opening, the curved transmembrane domain of MSL1 flattens and expands. Our structures, in combination with functional analyses, delineate a structural mechanism by which mechanosensitive channels open under increased membrane tension. Further, the shared structural feature between unrelated channels suggests the possibility of a unified mechanical gating mechanism stemming from membrane deformation induced by a non-planar transmembrane domain.


  • Organizational Affiliation

    Department of Cell Biology and Physiology, Washington University School of Medicine, Saint Louis, MO, 63110, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mechanosensitive ion channel protein 1, mitochondrial
A, B, C, D, E
A, B, C, D, E, F, G
428Arabidopsis thalianaMutation(s): 0 
Gene Names: MSL1At4g00290A_IG005I10.9F5I10.9
Membrane Entity: Yes 
UniProt
Find proteins for Q8VZL4 (Arabidopsis thaliana)
Explore Q8VZL4 
Go to UniProtKB:  Q8VZL4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8VZL4
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.39 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-05
    Type: Initial release
  • Version 1.1: 2020-08-12
    Changes: Database references
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references