8TDM

Cryo-EM structure of AtMSL10-K539E


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
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Literature

Open structure and gating of the Arabidopsis mechanosensitive ion channel MSL10.

Zhang, J.Maksaev, G.Yuan, P.

(2023) Nat Commun 14: 6284-6284

  • DOI: https://doi.org/10.1038/s41467-023-42117-5
  • Primary Citation of Related Structures:  
    8TDJ, 8TDK, 8TDL, 8TDM

  • PubMed Abstract: 

    Plants are challenged by drastically different osmotic environments during growth and development. Adaptation to these environments often involves mechanosensitive ion channels that can detect and respond to mechanical force. In the model plant Arabidopsis thaliana, the mechanosensitive channel MSL10 plays a crucial role in hypo-osmotic shock adaptation and programmed cell death induction, but the molecular basis of channel function remains poorly understood. Here, we report a structural and electrophysiological analysis of MSL10. The cryo-electron microscopy structures reveal a distinct heptameric channel assembly. Structures of the wild-type channel in detergent and lipid environments, and in the absence of membrane tension, capture an open conformation. Furthermore, structural analysis of a non-conductive mutant channel demonstrates that reorientation of phenylalanine side chains alone, without main chain rearrangements, may generate the hydrophobic gate. Together, these results reveal a distinct gating mechanism and advance our understanding of mechanotransduction.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mechanosensitive ion channel protein 10
A, B, C, D, E
A, B, C, D, E, F, G
741Arabidopsis thalianaMutation(s): 1 
Gene Names: MSL10
Membrane Entity: Yes 
UniProt
Find proteins for Q9LYG9 (Arabidopsis thaliana)
Explore Q9LYG9 
Go to UniProtKB:  Q9LYG9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9LYG9
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.20.1
RECONSTRUCTIONcryoSPARC

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM143440

Revision History  (Full details and data files)

  • Version 1.0: 2023-10-18
    Type: Initial release