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- PDB-7yum: MtaLon-Apo for the spiral oligomers of tetramer -

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Basic information

Entry
Database: PDB / ID: 7yum
TitleMtaLon-Apo for the spiral oligomers of tetramer
ComponentsLon protease
KeywordsHYDROLASE / AAA / protease / complex / proteolysis / Assembly
Function / homology
Function and homology information


endopeptidase La / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / cellular response to heat / sequence-specific DNA binding / serine-type endopeptidase activity / ATP hydrolysis activity / ATP binding / identical protein binding / metal ion binding / cytoplasm
Similarity search - Function
Lon protease, bacterial / Lon protease, bacterial/eukaryotic-type / Lon protease AAA+ ATPase lid domain / Peptidase S16, active site / ATP-dependent serine proteases, lon family, serine active site. / Lon proteolytic domain profile. / Peptidase S16, Lon proteolytic domain / Lon protease / Lon protease (S16) C-terminal proteolytic domain / Lon N-terminal domain profile. ...Lon protease, bacterial / Lon protease, bacterial/eukaryotic-type / Lon protease AAA+ ATPase lid domain / Peptidase S16, active site / ATP-dependent serine proteases, lon family, serine active site. / Lon proteolytic domain profile. / Peptidase S16, Lon proteolytic domain / Lon protease / Lon protease (S16) C-terminal proteolytic domain / Lon N-terminal domain profile. / Lon protease, N-terminal domain / Lon protease, N-terminal domain superfamily / ATP-dependent protease La (LON) substrate-binding domain / Found in ATP-dependent protease La (LON) / PUA-like superfamily / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / Ribosomal protein S5 domain 2-type fold, subgroup / Ribosomal protein S5 domain 2-type fold / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Biological speciesMeiothermus taiwanensis (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsLi, S. / Hsieh, K. / Kuo, C. / Lee, S. / Ho, M. / Wang, C. / Zhang, K. / Chang, C.I.
Funding support Taiwan, 1items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, Taiwan)108-2320-B-001-011-MY3 Taiwan
CitationJournal: Nat Commun / Year: 2023
Title: A 5+1 assemble-to-activate mechanism of the Lon proteolytic machine.
Authors: Shanshan Li / Kan-Yen Hsieh / Chiao-I Kuo / Tzu-Chi Lin / Szu-Hui Lee / Yi-Ru Chen / Chun-Hsiung Wang / Meng-Ru Ho / See-Yeun Ting / Kaiming Zhang / Chung-I Chang /
Abstract: Many AAA+ (ATPases associated with diverse cellular activities) proteins function as protein or DNA remodelers by threading the substrate through the central pore of their hexameric assemblies. In ...Many AAA+ (ATPases associated with diverse cellular activities) proteins function as protein or DNA remodelers by threading the substrate through the central pore of their hexameric assemblies. In this ATP-dependent translocating state, the substrate is gripped by the pore loops of the ATPase domains arranged in a universal right-handed spiral staircase organization. However, the process by which a AAA+ protein is activated to adopt this substrate-pore-loop arrangement remains unknown. We show here, using cryo-electron microscopy (cryo-EM), that the activation process of the Lon AAA+ protease may involve a pentameric assembly and a substrate-dependent incorporation of the sixth protomer to form the substrate-pore-loop contacts seen in the translocating state. Based on the structural results, we design truncated monomeric mutants that inhibit Lon activity by binding to the native pentamer and demonstrated that expressing these monomeric mutants in Escherichia coli cells containing functional Lon elicits specific phenotypes associated with lon deficiency, including the inhibition of persister cell formation. These findings uncover a substrate-dependent assembly process for the activation of a AAA+ protein and demonstrate a targeted approach to selectively inhibit its function within cells.
History
DepositionAug 17, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Oct 25, 2023Provider: repository / Type: Initial release
Revision 1.1Apr 3, 2024Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Lon protease
B: Lon protease
C: Lon protease
D: Lon protease


Theoretical massNumber of molelcules
Total (without water)354,2184
Polymers354,2184
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
Lon protease / ATP-dependent protease La


Mass: 88554.594 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Meiothermus taiwanensis (bacteria) / Gene: lonA1, lon
Production host: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
References: UniProt: A0A059VAZ3, endopeptidase La

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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: MtaLon-Apo for the spiral oligomers of tetramer / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightValue: 0.3 MDa / Experimental value: YES
Source (natural)Organism: Meiothermus taiwanensis (bacteria)
Source (recombinant)Organism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
Buffer solutionpH: 7.5
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: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 48 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.13_2998: / Classification: refinement
EM software
IDNameVersionCategory
2EPUimage acquisition
12cryoSPARCclassification
13cryoSPARC33D reconstruction
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 109756 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0116888
ELECTRON MICROSCOPYf_angle_d1.2222892
ELECTRON MICROSCOPYf_dihedral_angle_d15.69310392
ELECTRON MICROSCOPYf_chiral_restr0.0672604
ELECTRON MICROSCOPYf_plane_restr0.0092976

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