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Open data
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Basic information
Entry | Database: PDB / ID: 8tdl | ||||||
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Title | Cryo-EM structure of the wild-type AtMSL10 in saposin | ||||||
![]() | Mechanosensitive ion channel protein 10 | ||||||
![]() | TRANSPORT PROTEIN / ion channels / mechanosensitive channels / heptamer / Arabidopsis thaliana | ||||||
Function / homology | ![]() programmed cell death in response to reactive oxygen species / leaf senescence / detection of mechanical stimulus / mechanosensitive monoatomic ion channel activity / monoatomic anion transport / plasma membrane Similarity search - Function | ||||||
Biological species | ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å | ||||||
![]() | Zhang, J. / Yuan, P. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Open structure and gating of the Arabidopsis mechanosensitive ion channel MSL10. Authors: Jingying Zhang / Grigory Maksaev / Peng Yuan / ![]() 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 ...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. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 738.6 KB | Display | ![]() |
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PDB format | ![]() | 581.5 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 41166MC ![]() 8tdjC ![]() 8tdkC ![]() 8tdmC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
Experimental dataset #1 | Data reference: ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments: Component-ID: 1 / Ens-ID: ens_1 / Beg auth comp-ID: THR / Beg label comp-ID: THR / End auth comp-ID: THR / End label comp-ID: THR / Auth seq-ID: 166 - 731 / Label seq-ID: 166 - 731
NCS oper:
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Components
#1: Protein | Mass: 83955.562 Da / Num. of mol.: 7 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: AtMSL10 in saposin / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT | |||||||||||||||
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Molecular weight | Experimental value: NO | |||||||||||||||
Source (natural) | Organism: ![]() ![]() | |||||||||||||||
Source (recombinant) | Organism: ![]() | |||||||||||||||
Buffer solution | pH: 8 / Details: 20 mM Tris-HCl and 150 mM NaCl | |||||||||||||||
Buffer component |
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Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | |||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2 | |||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 59000 X / Nominal defocus max: 2400 nm / Nominal defocus min: 800 nm / Cs: 0.01 mm |
Image recording | Electron dose: 54 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) / Num. of real images: 2120 |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 404639 | |||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C7 (7 fold cyclic) | |||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 69275 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: RIGID BODY FIT | |||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 8TDJ Accession code: 8TDJ / Source name: PDB / Type: experimental model | |||||||||||||||||||||||||||||||||||||||||||||||||
Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | |||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 159.35 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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Refine LS restraints NCS |
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