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- PDB-7ngp: D1-state of wild type human mitochondrial LONP1 protease -

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Basic information

Entry
Database: PDB / ID: 7ngp
TitleD1-state of wild type human mitochondrial LONP1 protease
ComponentsLon protease homolog, mitochondrial
KeywordsMOTOR PROTEIN / human mitochondrial AAA+ protease
Function / homology
Function and homology information


oxidation-dependent protein catabolic process / PH domain binding / mitochondrial protein catabolic process / G-quadruplex DNA binding / endopeptidase La / mitochondrial DNA metabolic process / mitochondrial genome maintenance / protein quality control for misfolded or incompletely synthesized proteins / ATP-dependent peptidase activity / mitochondrial nucleoid ...oxidation-dependent protein catabolic process / PH domain binding / mitochondrial protein catabolic process / G-quadruplex DNA binding / endopeptidase La / mitochondrial DNA metabolic process / mitochondrial genome maintenance / protein quality control for misfolded or incompletely synthesized proteins / ATP-dependent peptidase activity / mitochondrial nucleoid / insulin receptor substrate binding / chaperone-mediated protein complex assembly / DNA polymerase binding / regulation of peptidyl-tyrosine phosphorylation / negative regulation of insulin receptor signaling pathway / Mitochondrial protein degradation / proteolysis involved in protein catabolic process / mitochondrion organization / ADP binding / protein catabolic process / single-stranded DNA binding / cellular response to oxidative stress / sequence-specific DNA binding / single-stranded RNA binding / response to hypoxia / mitochondrial matrix / serine-type endopeptidase activity / ATP hydrolysis activity / mitochondrion / nucleoplasm / ATP binding / identical protein binding / membrane / cytosol
Similarity search - Function
Lon protease homologue, chloroplastic/mitochondrial / 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 homologue, chloroplastic/mitochondrial / 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
ADENOSINE-5'-DIPHOSPHATE / Lon protease homolog, mitochondrial
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 15 Å
AuthorsMohammed, I. / Schmitz, K.A. / Schenck, N. / Maier, T. / Abrahams, J.P.
CitationJournal: Structure / Year: 2022
Title: Catalytic cycling of human mitochondrial Lon protease.
Authors: Inayathulla Mohammed / Kai A Schmitz / Niko Schenck / Dimitrios Balasopoulos / Annika Topitsch / Timm Maier / Jan Pieter Abrahams /
Abstract: The mitochondrial Lon protease (LonP1) regulates mitochondrial health by removing redundant proteins from the mitochondrial matrix. We determined LonP1 in eight nucleotide-dependent conformational ...The mitochondrial Lon protease (LonP1) regulates mitochondrial health by removing redundant proteins from the mitochondrial matrix. We determined LonP1 in eight nucleotide-dependent conformational states by cryoelectron microscopy (cryo-EM). The flexible assembly of N-terminal domains had 3-fold symmetry, and its orientation depended on the conformational state. We show that a conserved structural motif around T803 with a high similarity to the trypsin catalytic triad is essential for proteolysis. We show that LonP1 is not regulated by redox potential, despite the presence of two conserved cysteines at disulfide-bonding distance in its unfoldase core. Our data indicate how sequential ATP hydrolysis controls substrate protein translocation in a 6-fold binding change mechanism. Substrate protein translocation, rather than ATP hydrolysis, is a rate-limiting step, suggesting that LonP1 is a Brownian ratchet with ATP hydrolysis preventing translocation reversal. 3-fold rocking motions of the flexible N-domain assembly may assist thermal unfolding of the substrate protein.
History
DepositionFeb 9, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Apr 28, 2021Provider: repository / Type: Initial release
Revision 2.0Jul 7, 2021Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations
Category: atom_site / atom_type ...atom_site / atom_type / pdbx_struct_assembly / pdbx_struct_assembly_prop / pdbx_struct_sheet_hbond / pdbx_validate_close_contact / pdbx_validate_main_chain_plane / pdbx_validate_rmsd_angle / pdbx_validate_rmsd_bond / pdbx_validate_torsion / struct_conf / struct_sheet / struct_sheet_order / struct_sheet_range / struct_site / struct_site_gen
Item: _pdbx_struct_assembly.details / _pdbx_struct_assembly.method_details / _pdbx_struct_assembly_prop.value
Description: Model orientation/position
Details: The coordinates of 7ngl subunits were fitted as rigid bodies into the low resolution density of the LonP1 D1-state. The N-domains (res. 123-410) were fitted separately from the combined A- ...Details: The coordinates of 7ngl subunits were fitted as rigid bodies into the low resolution density of the LonP1 D1-state. The N-domains (res. 123-410) were fitted separately from the combined A- and protease domains (res 411-1001). The connecting loops (res 405-415) were reconnected with good geometry. Clashes between the rigid bodies were not corrected due to the low resolution.
Provider: author / Type: Coordinate replacement
Revision 2.1Aug 31, 2022Group: Database references / Category: citation / citation_author / database_2
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 2.2Sep 14, 2022Group: Database references / Category: citation / Item: _citation.journal_volume / _citation.page_first
Revision 2.3Nov 9, 2022Group: Database references / Category: citation / Item: _citation.page_last
Revision 2.4Jul 10, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond / em_admin / Item: _em_admin.last_update

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Structure visualization

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Assembly

Deposited unit
A: Lon protease homolog, mitochondrial
B: Lon protease homolog, mitochondrial
C: Lon protease homolog, mitochondrial
D: Lon protease homolog, mitochondrial
E: Lon protease homolog, mitochondrial
F: Lon protease homolog, mitochondrial
hetero molecules


Theoretical massNumber of molelcules
Total (without water)561,77212
Polymers559,2086
Non-polymers2,5636
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area28500 Å2
ΔGint-75 kcal/mol
Surface area238250 Å2

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Components

#1: Protein
Lon protease homolog, mitochondrial / LONHs / Lon protease-like protein / LONP / Mitochondrial ATP-dependent protease Lon / Serine protease 15


Mass: 93201.383 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: LONP1, PRSS15 / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: P36776, endopeptidase La
#2: Chemical
ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Feature type: SUBJECT OF INVESTIGATION / Comment: ADP, energy-carrying molecule*YM
Has ligand of interestY

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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: D1-state of LonP1 hexameric complex / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.6 MDa / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.4
SpecimenConc.: 0.45 mg/ml / Embedding 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: OTHER
Electron lensMode: BRIGHT FIELD
Image recordingElectron dose: 64 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.18.2_3874: / Classification: refinement
EM software
IDNameCategory
12RELION3D reconstruction
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 15 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 15000 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0137644
ELECTRON MICROSCOPYf_angle_d1.33650856
ELECTRON MICROSCOPYf_dihedral_angle_d20.88814466
ELECTRON MICROSCOPYf_chiral_restr0.0645832
ELECTRON MICROSCOPYf_plane_restr0.0086528

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