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- PDB-8ovf: Human Mitochondrial Lon Y186F Mutant ADP Bound -

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Basic information

Entry
Database: PDB / ID: 8ovf
TitleHuman Mitochondrial Lon Y186F Mutant ADP Bound
ComponentsLon protease homolog, mitochondrial
KeywordsHYDROLASE / Human mitochondrial AAA+ protease / motor protein
Function / homology
Function and homology information


oxidation-dependent protein catabolic process / response to aluminum ion / PH domain binding / endopeptidase La / mitochondrial protein catabolic process / mitochondrial DNA metabolic process / G-quadruplex DNA binding / : / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins ...oxidation-dependent protein catabolic process / response to aluminum ion / PH domain binding / endopeptidase La / mitochondrial protein catabolic process / mitochondrial DNA metabolic process / G-quadruplex DNA binding / : / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / mitochondrial nucleoid / insulin receptor substrate binding / Mitochondrial unfolded protein response (UPRmt) / chaperone-mediated protein complex assembly / response to hormone / DNA polymerase binding / Mitochondrial protein degradation / negative regulation of insulin receptor signaling pathway / proteolysis involved in protein catabolic process / mitochondrion organization / protein catabolic process / ADP binding / single-stranded DNA binding / cellular response to oxidative stress / sequence-specific DNA binding / response to hypoxia / single-stranded RNA binding / 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 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: 7.23 Å
AuthorsKereiche, S. / Bauer, J.A. / Matyas, P. / Novacek, J. / Kutejova, E.
Funding supportEuropean Union, Czech Republic, 7items
OrganizationGrant numberCountry
Other governmentAPVV-15-0375
Other governmentAPVV-19-0298
Other governmentVEGA-2/0069/23
Other governmentVEGA-2/0131/20
European Regional Development FundITMS:305011X666European Union
Ministry of Education, Youth and Sports of the Czech RepublicCIISB project LM2018127 Czech Republic
Czech Science Foundation1825144Y Czech Republic
CitationJournal: Sci Rep / Year: 2024
Title: Polyphosphate and tyrosine phosphorylation in the N-terminal domain of the human mitochondrial Lon protease disrupts its functions.
Authors: Nina Kunová / Gabriela Ondrovičová / Jacob A Bauer / Veronika Krajčovičová / Matyáš Pinkas / Barbora Stojkovičová / Henrieta Havalová / Veronika Lukáčová / Lenka Kohútová / ...Authors: Nina Kunová / Gabriela Ondrovičová / Jacob A Bauer / Veronika Krajčovičová / Matyáš Pinkas / Barbora Stojkovičová / Henrieta Havalová / Veronika Lukáčová / Lenka Kohútová / Július Košťan / Lucia Martináková / Peter Baráth / Jiří Nováček / Sebastian Zoll / Sami Kereïche / Eva Kutejová / Vladimír Pevala /
Abstract: Phosphorylation plays a crucial role in the regulation of many fundamental cellular processes. Phosphorylation levels are increased in many cancer cells where they may promote changes in ...Phosphorylation plays a crucial role in the regulation of many fundamental cellular processes. Phosphorylation levels are increased in many cancer cells where they may promote changes in mitochondrial homeostasis. Proteomic studies on various types of cancer identified 17 phosphorylation sites within the human ATP-dependent protease Lon, which degrades misfolded, unassembled and oxidatively damaged proteins in mitochondria. Most of these sites were found in Lon's N-terminal (NTD) and ATPase domains, though little is known about the effects on their function. By combining the biochemical and cryo-electron microscopy studies, we show the effect of Tyr186 and Tyr394 phosphorylations in Lon's NTD, which greatly reduce all Lon activities without affecting its ability to bind substrates or perturbing its tertiary structure. A substantial reduction in Lon's activities is also observed in the presence of polyphosphate, whose amount significantly increases in cancer cells. Our study thus provides an insight into the possible fine-tuning of Lon activities in human diseases, which highlights Lon's importance in maintaining proteostasis in mitochondria.
History
DepositionApr 26, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 8, 2024Provider: repository / Type: Initial release
Revision 1.1May 15, 2024Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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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)591,66612
Polymers589,1036
Non-polymers2,5636
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area29240 Å2
ΔGint-131 kcal/mol
Surface area231670 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: 98183.852 Da / Num. of mol.: 6 / Mutation: Y186F
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: LONP1, PRSS15 / Production host: Escherichia coli (E. coli) / Strain (production host): Rosetta 2(DE3) / 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 / Comment: ADP, energy-carrying molecule*YM
Has ligand of interestN

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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: Human mitochondrial Lon protease / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human) / Organelle: mitochondria
Source (recombinant)Organism: Escherichia coli (E. coli) / Strain: Rosetta 2(DE3)
Buffer solutionpH: 7
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: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 40 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.21rc1_4895 / Classification: refinement
EM softwareName: PHENIX / Version: 1.21rc1_4895 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 7.23 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 37657 / Symmetry type: POINT
Atomic model buildingProtocol: FLEXIBLE FIT / Space: REAL
Atomic model buildingPDB-ID: 7NFY

7nfy


Pdb chain-ID: A / Accession code: 7NFY / Source name: PDB / Type: experimental model
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 163.03 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.002237680
ELECTRON MICROSCOPYf_angle_d0.513950898
ELECTRON MICROSCOPYf_chiral_restr0.03945838
ELECTRON MICROSCOPYf_plane_restr0.00336534
ELECTRON MICROSCOPYf_dihedral_angle_d5.17765124

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