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- PDB-8idb: Cryo-EM structure of Mycobacterium tuberculosis FtsEX complex in ... -

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Basic information

Entry
Database: PDB / ID: 8idb
TitleCryo-EM structure of Mycobacterium tuberculosis FtsEX complex in peptidisc
Components
  • Cell division ATP-binding protein FtsE
  • Cell division protein FtsX
KeywordsTRANSPORT PROTEIN / complex
Function / homology
Function and homology information


transmembrane transporter activity / transmembrane transport / manganese ion binding / cell division / magnesium ion binding / ATP hydrolysis activity / ATP binding / plasma membrane
Similarity search - Function
: / Cell division protein FtsE, ATP-binding / Cell division protein FtsX / FtsX, extracellular domain / FtsX extracellular domain / ABC transporter, lipoprotein release, LolD / ABC3 transporter permease protein domain / FtsX-like permease C-terminal / ABC transporter-like, conserved site / ABC transporters family signature. ...: / Cell division protein FtsE, ATP-binding / Cell division protein FtsX / FtsX, extracellular domain / FtsX extracellular domain / ABC transporter, lipoprotein release, LolD / ABC3 transporter permease protein domain / FtsX-like permease C-terminal / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Cell division protein FtsX / Cell division ATP-binding protein FtsE
Similarity search - Component
Biological speciesMycobacterium tuberculosis (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsLi, J. / Xu, X. / Luo, M.
Funding support Singapore, 1items
OrganizationGrant numberCountry
Ministry of Education (MoE, Singapore)A-0008412-00-00 Singapore
CitationJournal: Nat Commun / Year: 2023
Title: Regulation of the cell division hydrolase RipC by the FtsEX system in Mycobacterium tuberculosis.
Authors: Jianwei Li / Xin Xu / Jian Shi / Juan A Hermoso / Lok-To Sham / Min Luo /
Abstract: The FtsEX complex regulates, directly or via a protein mediator depending on bacterial genera, peptidoglycan degradation for cell division. In mycobacteria and Gram-positive bacteria, the FtsEX ...The FtsEX complex regulates, directly or via a protein mediator depending on bacterial genera, peptidoglycan degradation for cell division. In mycobacteria and Gram-positive bacteria, the FtsEX system directly activates peptidoglycan-hydrolases by a mechanism that remains unclear. Here we report our investigation of Mycobacterium tuberculosis FtsEX as a non-canonical regulator with high basal ATPase activity. The cryo-EM structures of the FtsEX system alone and in complex with RipC, as well as the ATP-activated state, unveil detailed information on the signal transduction mechanism, leading to the activation of RipC. Our findings indicate that RipC is recognized through a "Match and Fit" mechanism, resulting in an asymmetric rearrangement of the extracellular domains of FtsX and a unique inclined binding mode of RipC. This study provides insights into the molecular mechanisms of FtsEX and RipC regulation in the context of a critical human pathogen, guiding the design of drugs targeting peptidoglycan remodeling.
History
DepositionFeb 12, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 4, 2023Provider: repository / Type: Initial release
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Revision 1.1Dec 20, 2023Group: Database references / Category: citation / citation_author
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Revision 1.2Nov 6, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update
Revision 1.3Jun 18, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Cell division ATP-binding protein FtsE
B: Cell division ATP-binding protein FtsE
C: Cell division protein FtsX
D: Cell division protein FtsX


Theoretical massNumber of molelcules
Total (without water)117,2364
Polymers117,2364
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Cell division ATP-binding protein FtsE


Mass: 25766.697 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: ftsE, Rv3102c, RVBD_3102c, LH57_16935, P425_03233
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: O05779
#2: Protein Cell division protein FtsX


Mass: 32851.355 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mycobacterium tuberculosis (bacteria) / Gene: ftsX
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: A0A045GRS5
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: complex of FtsEX / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Mycobacterium tuberculosis (bacteria)
Source (recombinant)Organism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: SPOT SCAN
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm / Calibrated defocus min: 1000 nm / Calibrated defocus max: 2500 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm
Image recordingAverage exposure time: 6.02 sec. / Electron dose: 36.353 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1

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Processing

EM softwareName: PHENIX / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 111140 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0056921
ELECTRON MICROSCOPYf_angle_d1.0489454
ELECTRON MICROSCOPYf_dihedral_angle_d4.8771029
ELECTRON MICROSCOPYf_chiral_restr0.0591203
ELECTRON MICROSCOPYf_plane_restr0.0071222

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