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- PDB-31ep: P1a-state of wild type human mitochondrial LONP1 protease with bo... -

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Basic information

Entry
Database: PDB / ID: 31ep
TitleP1a-state of wild type human mitochondrial LONP1 protease with bound substrate protein, ADP and aluminum fluoride
Components
  • Lon protease homolog, mitochondrial
  • unknown translocated polypeptide substrate
KeywordsMOTOR PROTEIN / AAA+ protease / Lon protease / transition state
Function / homology
Function and homology information


oxidation-dependent protein catabolic process / response to aluminum ion / PH domain binding / endopeptidase La / mitochondrial protein catabolic process / G-quadruplex DNA binding / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / mitochondrial nucleoid / insulin receptor substrate binding ...oxidation-dependent protein catabolic process / response to aluminum ion / PH domain binding / endopeptidase La / mitochondrial protein catabolic 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 / DNA polymerase binding / response to hormone / negative regulation of insulin receptor signaling pathway / Mitochondrial protein degradation / : / mitochondrion organization / 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 / membrane / identical protein binding / 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 / ALUMINUM FLUORIDE / Lon protease homolog, mitochondrial
Similarity search - Component
Biological speciesHomo sapiens (human)
Escherichia coli K-12 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.54 Å
AuthorsSchenck, N. / Filipcik, P. / Abrahams, J.P.
Funding support Switzerland, 1items
OrganizationGrant numberCountry
Other government Switzerland
CitationJournal: biorxiv
Title: Human mitochondrial Lon protease initiates unidirectional degradation from either substrate terminus
Authors: Schenck, N. / Filipcik, P. / Abrahams, J.P.
History
DepositionMay 29, 2026Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 17, 2026Provider: repository / Type: Initial release
Revision 1.0Jun 17, 2026Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jun 17, 2026Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Jun 17, 2026Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jun 17, 2026Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Jun 17, 2026Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jun 17, 2026Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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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
G: unknown translocated polypeptide substrate
H: unknown translocated polypeptide substrate
hetero molecules


Theoretical massNumber of molelcules
Total (without water)583,76522
Polymers580,7688
Non-polymers2,99614
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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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: 96419.953 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli K-12 (bacteria) / References: UniProt: P36776, endopeptidase La
#2: Protein/peptide unknown translocated polypeptide substrate


Mass: 1124.378 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli K-12 (bacteria) / Production host: Escherichia coli K-12 (bacteria)
#3: 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
#4: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical
ChemComp-AF3 / ALUMINUM FLUORIDE


Mass: 83.977 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: AlF3 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationN

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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: Lon protease homolog, mitochondrial / Type: COMPLEX
Details: P1a-state of wild type human mitochondrial LONP1 protease with bound substrate protein, ADP and aluminum fluoride
Entity ID: #2 / Source: RECOMBINANT
Molecular weightValue: 0.585 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli K-12 (bacteria)
Buffer solutionpH: 7.5
Details: Pure LonP1 fractions (1.0 mg/mL) were incubated with 1 mM ADP in SEC buffer (50 mM HEPES, 150 mM NaCl, 5 mM MgCl2, pH 7.5) for 20 min at room temperature. Subsequently, 3.125 mM NaF was ...Details: Pure LonP1 fractions (1.0 mg/mL) were incubated with 1 mM ADP in SEC buffer (50 mM HEPES, 150 mM NaCl, 5 mM MgCl2, pH 7.5) for 20 min at room temperature. Subsequently, 3.125 mM NaF was added, followed by 0.625 mM AlCl3 after additional 20 min incubation for each step to generate the LonP1-ADP-AlF3 complex.
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid type: Quantifoil R1.2/1.3
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 40.5 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM software
IDNameCategory
1cryoSPARCparticle selection
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.54 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 180065 / Symmetry type: POINT

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