9SED | pdb_00009sed

mechanosensitive channel MscS from Francisella tularensis, mutant K70A

PDB DOI: https://doi.org/10.2210/pdb9SED/pdb
EM Map EMD-54807: EMDB EMDataResource

Classification: MEMBRANE PROTEIN
Organism(s): Francisella tularensis
Expression System: Escherichia coli
Mutation(s): Yes

Deposited: 2025-08-16 Released: 2026-08-26
Deposition Author(s): Rasmussen, A., Hemmelmann, N., Hove, T.T., Flegler, V.J., Rasmussen, T., Bottcher, B.
Funding Organization(s): German Research Foundation (DFG)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.77 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

This is version 1.0 of the entry. See complete history.

Literature

An asymmetric gate in the homoheptameric mechanosensitive channel MscS from Francisella tularensis

Rasmussen, A., Hemmelmann, N., Bahner, J., Hove, T.T., Flegler, V.J., Kraft, C., Hedrich, R., Rasmussen, T., Bottcher, B.

To be published.

Macromolecule Content

Total Structure Weight: 141.57 kDa
Atom Count: 8,981
Modeled Residue Count: 1,099
Deposited Residue Count: 1,197
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Small-conductance mechanosensitive channel	A, B, C, D, E A, B, C, D, E, F, G	171	Francisella tularensis	Mutation(s): 1 Gene Names: FWI86_02060, FWJ04_01320
UniProt
Find proteins for A0A0B3VCY4 (Francisella tularensis subsp. holarctica) Explore A0A0B3VCY4 Go to UniProtKB: A0A0B3VCY4
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0A0B3VCY4
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 4 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
PEE (Subject of Investigation/LOI) Query on PEE Download:Ideal Coordinates CCD File SDF format, chain Z [auth D] SDF format, chain TA [auth G] SDF format, chain T [auth C] SDF format, chain N [auth B] SDF format, chain MA [auth F] SDF format, chain H [auth A] SDF format, chain FA [auth E] MOL2 format, chain Z [auth D] MOL2 format, chain TA [auth G] MOL2 format, chain T [auth C] MOL2 format, chain N [auth B] MOL2 format, chain MA [auth F] MOL2 format, chain H [auth A] MOL2 format, chain FA [auth E] mmCIF format, chain Z [auth D] mmCIF format, chain TA [auth G] mmCIF format, chain T [auth C] mmCIF format, chain N [auth B] mmCIF format, chain MA [auth F] mmCIF format, chain H [auth A] mmCIF format, chain FA [auth E]	FA [auth E] H [auth A] MA [auth F] N [auth B] T [auth C] FA [auth E], H [auth A], MA [auth F], N [auth B], T [auth C], TA [auth G], Z [auth D]	1,2-dioleoyl-sn-glycero-3-phosphoethanolamine C₄₁ H₇₈ N O₈ P MWRBNPKJOOWZPW-NYVOMTAGSA-N		Interactions Focus chain FA [auth E] Focus chain H [auth A] Focus chain MA [auth F] Focus chain N [auth B] Focus chain T [auth C] Focus chain TA [auth G] Focus chain Z [auth D] Interactions & Density Focus chain FA [auth E] Focus chain H [auth A] Focus chain MA [auth F] Focus chain N [auth B] Focus chain T [auth C] Focus chain TA [auth G] Focus chain Z [auth D]
C14 (Subject of Investigation/LOI) Query on C14 Download:Ideal Coordinates CCD File SDF format, chain X [auth C] SDF format, chain WA [auth G] SDF format, chain W [auth C] SDF format, chain VA [auth G] SDF format, chain V [auth C] SDF format, chain RA [auth G] SDF format, chain R [auth B] SDF format, chain QA [auth F] SDF format, chain Q [auth B] SDF format, chain PA [auth F] SDF format, chain P [auth B] SDF format, chain OA [auth F] SDF format, chain L [auth A] SDF format, chain K [auth A] SDF format, chain JA [auth E] SDF format, chain J [auth A] SDF format, chain IA [auth E] SDF format, chain HA [auth E] SDF format, chain DA [auth D] SDF format, chain CA [auth D] SDF format, chain BA [auth D] MOL2 format, chain X [auth C] MOL2 format, chain WA [auth G] MOL2 format, chain W [auth C] MOL2 format, chain VA [auth G] MOL2 format, chain V [auth C] MOL2 format, chain RA [auth G] MOL2 format, chain R [auth B] MOL2 format, chain QA [auth F] MOL2 format, chain Q [auth B] MOL2 format, chain PA [auth F] MOL2 format, chain P [auth B] MOL2 format, chain OA [auth F] MOL2 format, chain L [auth A] MOL2 format, chain K [auth A] MOL2 format, chain JA [auth E] MOL2 format, chain J [auth A] MOL2 format, chain IA [auth E] MOL2 format, chain HA [auth E] MOL2 format, chain DA [auth D] MOL2 format, chain CA [auth D] MOL2 format, chain BA [auth D] mmCIF format, chain X [auth C] mmCIF format, chain WA [auth G] mmCIF format, chain W [auth C] mmCIF format, chain VA [auth G] mmCIF format, chain V [auth C] mmCIF format, chain RA [auth G] mmCIF format, chain R [auth B] mmCIF format, chain QA [auth F] mmCIF format, chain Q [auth B] mmCIF format, chain PA [auth F] mmCIF format, chain P [auth B] mmCIF format, chain OA [auth F] mmCIF format, chain L [auth A] mmCIF format, chain K [auth A] mmCIF format, chain JA [auth E] mmCIF format, chain J [auth A] mmCIF format, chain IA [auth E] mmCIF format, chain HA [auth E] mmCIF format, chain DA [auth D] mmCIF format, chain CA [auth D] mmCIF format, chain BA [auth D]	BA [auth D] CA [auth D] DA [auth D] HA [auth E] IA [auth E] BA [auth D], CA [auth D], DA [auth D], HA [auth E], IA [auth E], J [auth A], JA [auth E], K [auth A], L [auth A], OA [auth F], P [auth B], PA [auth F], Q [auth B], QA [auth F], R [auth B], RA [auth G], V [auth C], VA [auth G], W [auth C], WA [auth G], X [auth C]	TETRADECANE C₁₄ H₃₀ BGHCVCJVXZWKCC-UHFFFAOYSA-N		Interactions Focus chain BA [auth D] Focus chain CA [auth D] Focus chain DA [auth D] Focus chain HA [auth E] Focus chain IA [auth E] Focus chain J [auth A] Focus chain JA [auth E] Focus chain K [auth A] Focus chain L [auth A] Focus chain OA [auth F] Focus chain P [auth B] Focus chain PA [auth F] Focus chain Q [auth B] Focus chain QA [auth F] Focus chain R [auth B] Focus chain RA [auth G] Focus chain V [auth C] Focus chain VA [auth G] Focus chain W [auth C] Focus chain WA [auth G] Focus chain X [auth C] Interactions & Density Focus chain BA [auth D] Focus chain CA [auth D] Focus chain DA [auth D] Focus chain HA [auth E] Focus chain IA [auth E] Focus chain J [auth A] Focus chain JA [auth E] Focus chain K [auth A] Focus chain L [auth A] Focus chain OA [auth F] Focus chain P [auth B] Focus chain PA [auth F] Focus chain Q [auth B] Focus chain QA [auth F] Focus chain R [auth B] Focus chain RA [auth G] Focus chain V [auth C] Focus chain VA [auth G] Focus chain W [auth C] Focus chain WA [auth G] Focus chain X [auth C]
D12 (Subject of Investigation/LOI) Query on D12 Download:Ideal Coordinates CCD File SDF format, chain Y [auth C] SDF format, chain SA [auth G] SDF format, chain S [auth B] SDF format, chain M [auth A] SDF format, chain LA [auth F] SDF format, chain KA [auth E] SDF format, chain EA [auth D] MOL2 format, chain Y [auth C] MOL2 format, chain SA [auth G] MOL2 format, chain S [auth B] MOL2 format, chain M [auth A] MOL2 format, chain LA [auth F] MOL2 format, chain KA [auth E] MOL2 format, chain EA [auth D] mmCIF format, chain Y [auth C] mmCIF format, chain SA [auth G] mmCIF format, chain S [auth B] mmCIF format, chain M [auth A] mmCIF format, chain LA [auth F] mmCIF format, chain KA [auth E] mmCIF format, chain EA [auth D]	EA [auth D] KA [auth E] LA [auth F] M [auth A] S [auth B] EA [auth D], KA [auth E], LA [auth F], M [auth A], S [auth B], SA [auth G], Y [auth C]	DODECANE C₁₂ H₂₆ SNRUBQQJIBEYMU-UHFFFAOYSA-N		Interactions Focus chain EA [auth D] Focus chain KA [auth E] Focus chain LA [auth F] Focus chain M [auth A] Focus chain S [auth B] Focus chain SA [auth G] Focus chain Y [auth C] Interactions & Density Focus chain EA [auth D] Focus chain KA [auth E] Focus chain LA [auth F] Focus chain M [auth A] Focus chain S [auth B] Focus chain SA [auth G] Focus chain Y [auth C]
OCT (Subject of Investigation/LOI) Query on OCT Download:Ideal Coordinates CCD File SDF format, chain UA [auth G] SDF format, chain U [auth C] SDF format, chain O [auth B] SDF format, chain NA [auth F] SDF format, chain I [auth A] SDF format, chain GA [auth E] SDF format, chain AA [auth D] MOL2 format, chain UA [auth G] MOL2 format, chain U [auth C] MOL2 format, chain O [auth B] MOL2 format, chain NA [auth F] MOL2 format, chain I [auth A] MOL2 format, chain GA [auth E] MOL2 format, chain AA [auth D] mmCIF format, chain UA [auth G] mmCIF format, chain U [auth C] mmCIF format, chain O [auth B] mmCIF format, chain NA [auth F] mmCIF format, chain I [auth A] mmCIF format, chain GA [auth E] mmCIF format, chain AA [auth D]	AA [auth D] GA [auth E] I [auth A] NA [auth F] O [auth B] AA [auth D], GA [auth E], I [auth A], NA [auth F], O [auth B], U [auth C], UA [auth G]	N-OCTANE C₈ H₁₈ TVMXDCGIABBOFY-UHFFFAOYSA-N		Interactions Focus chain AA [auth D] Focus chain GA [auth E] Focus chain I [auth A] Focus chain NA [auth F] Focus chain O [auth B] Focus chain U [auth C] Focus chain UA [auth G] Interactions & Density Focus chain AA [auth D] Focus chain GA [auth E] Focus chain I [auth A] Focus chain NA [auth F] Focus chain O [auth B] Focus chain U [auth C] Focus chain UA [auth G]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 2.77 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	4.7
MODEL REFINEMENT	PHENIX	1.20.1_4487

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-08-26

Deposition Author(s):

Funding Organization	Location	Grant Number
German Research Foundation (DFG)	Germany	538122946
German Research Foundation (DFG)	Germany	359471283
German Research Foundation (DFG)	Germany	525040890
German Research Foundation (DFG)	Germany	456578072