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- PDB-7ng4: P1b-state of wild type human mitochondrial LONP1 protease with bo... -

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Basic information

Entry
Database: PDB / ID: 7ng4
TitleP1b-state of wild type human mitochondrial LONP1 protease with bound endogenous substrate protein and in presence of ATP/ADP mix
Components
  • Lon protease homolog, mitochondrial
  • substrate protein, chain G
KeywordsMOTOR PROTEIN / human mitochondrial AAA+ protease
Function / homology
Function and homology information


oxidation-dependent protein catabolic process / PH domain binding / mitochondrial protein catabolic process / endopeptidase La / G-quadruplex DNA binding / mitochondrial DNA metabolic process / mitochondrial genome maintenance / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / mitochondrial nucleoid ...oxidation-dependent protein catabolic process / PH domain binding / mitochondrial protein catabolic process / endopeptidase La / G-quadruplex DNA binding / mitochondrial DNA metabolic process / mitochondrial genome maintenance / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / mitochondrial nucleoid / insulin receptor substrate binding / chaperone-mediated protein complex assembly / negative regulation of insulin receptor signaling pathway / DNA polymerase binding / Mitochondrial protein degradation / 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 / 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 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 / ADENOSINE-5'-TRIPHOSPHATE / Lon protease homolog, mitochondrial
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.4 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 8, 2021Deposition site: PDBE / Processing site: PDBE
Revision 1.0Feb 24, 2021Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2021Group: Database references / Category: pdbx_database_related
Revision 2.0Jul 7, 2021Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Structure summary
Category: atom_site / em_software ...atom_site / em_software / pdbx_poly_seq_scheme / pdbx_struct_assembly_prop / pdbx_struct_conn_angle / pdbx_struct_sheet_hbond / pdbx_unobs_or_zero_occ_residues / pdbx_validate_close_contact / pdbx_validate_main_chain_plane / pdbx_validate_rmsd_angle / pdbx_validate_rmsd_bond / pdbx_validate_torsion / struct_conf / struct_conn / struct_ref_seq / struct_sheet / struct_sheet_order / struct_sheet_range
Item: _em_software.category / _em_software.fitting_id ..._em_software.category / _em_software.fitting_id / _em_software.imaging_id / _pdbx_poly_seq_scheme.auth_mon_id / _pdbx_poly_seq_scheme.auth_seq_num / _pdbx_poly_seq_scheme.pdb_mon_id / _pdbx_poly_seq_scheme.pdb_seq_num / _pdbx_struct_assembly_prop.value / _struct_ref_seq.db_align_beg / _struct_ref_seq.db_align_end / _struct_ref_seq.pdbx_auth_seq_align_beg / _struct_ref_seq.pdbx_auth_seq_align_end
Description: Model completeness
Details: We now only included segments of the substrate protein in the deposited models where the N-and C-terminal ends had a density above 4.5 RMSD in the final maps and the density between these ...Details: We now only included segments of the substrate protein in the deposited models where the N-and C-terminal ends had a density above 4.5 RMSD in the final maps and the density between these termini did not drop below 3.5 RMSD. A final round of refinement improved the clash score, resulting in a better balance of model geometry parameters.
Provider: author / Type: Coordinate replacement
Revision 3.0Aug 10, 2022Group: Atomic model / Database references
Category: atom_site / citation ...atom_site / citation / citation_author / database_2
Item: _atom_site.auth_atom_id / _atom_site.label_atom_id ..._atom_site.auth_atom_id / _atom_site.label_atom_id / _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 3.1Sep 14, 2022Group: Database references / Category: citation / Item: _citation.journal_volume / _citation.page_first
Revision 3.2Nov 9, 2022Group: Database references / Category: citation / Item: _citation.page_last
Revision 3.3Jul 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
G: substrate protein, chain G
hetero molecules


Theoretical massNumber of molelcules
Total (without water)585,41217
Polymers582,4317
Non-polymers2,98010
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area43180 Å2
ΔGint-171 kcal/mol
Surface area225670 Å2
MethodPISA

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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: 96288.758 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: Protein substrate protein, chain G


Mass: 4698.783 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli BL21(DE3) (bacteria)
#3: Chemical
ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE


Mass: 507.181 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Feature type: SUBJECT OF INVESTIGATION / Comment: ATP, 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-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 2 / 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: P1b-state of hexameric LONP1 complex with ATP/ADP and bound endogenous substrate protein
Type: COMPLEX / Entity ID: #1-#2 / 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: 7.5
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
Particle selectionNum. of particles selected: 31607
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 31607 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00837935
ELECTRON MICROSCOPYf_angle_d0.94951268
ELECTRON MICROSCOPYf_dihedral_angle_d30.4755193
ELECTRON MICROSCOPYf_chiral_restr0.0475887
ELECTRON MICROSCOPYf_plane_restr0.0066583

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