6PWP

MscS Nanodisc


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report



Literature

Molecular basis of force-from-lipids gating in the mechanosensitive channel MscS.

Reddy, B.Bavi, N.Lu, A.Park, Y.Perozo, E.

(2019) Elife 8

  • DOI: 10.7554/eLife.50486
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Prokaryotic mechanosensitive (MS) channels open by sensing the physical state of the membrane. As such, lipid-protein interactions represent the defining molecular process underlying mechanotransduction. Here, we describe cryo-electron microscopy (cr ...

    Prokaryotic mechanosensitive (MS) channels open by sensing the physical state of the membrane. As such, lipid-protein interactions represent the defining molecular process underlying mechanotransduction. Here, we describe cryo-electron microscopy (cryo-EM) structures of the E. coli small-conductance mechanosensitive channel (MscS) in nanodiscs (ND). They reveal a novel membrane-anchoring fold that plays a significant role in channel activation and establish a new location for the lipid bilayer, shifted ~14 Å from previous consensus placements. Two types of lipid densities are explicitly observed. A phospholipid that 'hooks' the top of each TM2-TM3 hairpin and likely plays a role in force sensing, and a bundle of acyl chains occluding the permeation path above the L105 cuff. These observations reshape our understanding of force-from-lipids gating in MscS and highlight the key role of allosteric interactions between TM segments and phospholipids bound to key dynamic components of the channel.


    Organizational Affiliation

    Institute for Biophysical Dynamics, The University of Chicago, Chicago, United States.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Small-conductance mechanosensitive channelA, B, C, D, E, F, G289Escherichia coli K-12Mutation(s): 0 
Gene Names: mscSyggBb2924JW2891
Find proteins for P0C0S1 (Escherichia coli (strain K12))
Explore P0C0S1 
Go to UniProtKB:  P0C0S1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesR01 GM133191

Revision History 

  • Version 1.0: 2020-01-08
    Type: Initial release