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- EMDB-45431: Human Mitochondrial LONP1 Idle State bound to substrate and 6 ADP -

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Basic information

Entry
Database: EMDB / ID: EMD-45431
TitleHuman Mitochondrial LONP1 Idle State bound to substrate and 6 ADP
Map dataSharpened map
Sample
  • Complex: LONP1 Dwell state in complex with casein
    • Protein or peptide: Lon protease homolog, mitochondrial
    • Protein or peptide: Bound substrate segment undergoing degradation
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
KeywordsATPase / protease / HYDROLASE
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
Lon protease homolog, mitochondrial
Similarity search - Component
Biological speciesHomo sapiens (human) / Bos taurus (domestic cattle)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.92 Å
AuthorsMindrebo JT / Lander GC
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)F32GM145143 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS095892 United States
CitationJournal: To Be Published
Title: Structural and mechanistic studies on human LONP1 redefine the hand-over-hand translocation mechanism
Authors: Mindrebo JT / Lander GC
History
DepositionJun 20, 2024-
Header (metadata) releaseApr 30, 2025-
Map releaseApr 30, 2025-
UpdateApr 30, 2025-
Current statusApr 30, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_45431.png

Downloads & links

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Map

FileDownload / File: emd_45431.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 400 pix.
= 333.2 Å		0.83 Å/pix.
x 400 pix.
= 333.2 Å		0.83 Å/pix.
x 400 pix.
= 333.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.833 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.3
Minimum - Maximum-1.149548 - 1.9738742
Average (Standard dev.)0.00038640513 (±0.047624703)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 333.2 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Unsharpened map

Fileemd_45431_additional_1.map
AnnotationUnsharpened map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half Map B

Fileemd_45431_half_map_1.map
AnnotationHalf Map B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map A

Fileemd_45431_half_map_2.map
AnnotationHalf map A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : LONP1 Dwell state in complex with casein

EntireName: LONP1 Dwell state in complex with casein
Components
  • Complex: LONP1 Dwell state in complex with casein
    • Protein or peptide: Lon protease homolog, mitochondrial
    • Protein or peptide: Bound substrate segment undergoing degradation
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-DIPHOSPHATE

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Supramolecule #1: LONP1 Dwell state in complex with casein

SupramoleculeName: LONP1 Dwell state in complex with casein / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #2, #1
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 583.95 KDa

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Macromolecule #1: Bound substrate segment undergoing degradation

MacromoleculeName: Bound substrate segment undergoing degradation / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (domestic cattle)
Molecular weightTheoretical: 1.039273 KDa
SequenceString:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)

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Macromolecule #2: Lon protease homolog, mitochondrial

MacromoleculeName: Lon protease homolog, mitochondrial / type: protein_or_peptide / ID: 2 / Number of copies: 6 / Enantiomer: LEVO / EC number: endopeptidase La
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 97.468156 KDa
Recombinant expressionOrganism: Escherichia coli 'BL21-Gold(DE3)pLysS AG' (bacteria)
SequenceString: MHHHHHHENL YFQGAHMMTI PDVFPHLPLI AITRNPVFPR FIKIIEVKNK KLVELLRRKV RLAQPYVGVF LKRDDSNESD VVESLDEIY HTGTFAQIHE MQDLGDKLRM IVMGHRRVHI SRQLEVEPEE PEAENKHKPR RKSKRGKKEA EDELSARHPA E LAMEPTPE ...String:
MHHHHHHENL YFQGAHMMTI PDVFPHLPLI AITRNPVFPR FIKIIEVKNK KLVELLRRKV RLAQPYVGVF LKRDDSNESD VVESLDEIY HTGTFAQIHE MQDLGDKLRM IVMGHRRVHI SRQLEVEPEE PEAENKHKPR RKSKRGKKEA EDELSARHPA E LAMEPTPE LPAEVLMVEV ENVVHEDFQV TEEVKALTAE IVKTIRDIIA LNPLYRESVL QMMQAGQRVV DNPIYLSDMG AA LTGAESH ELQDVLEETN IPKRLYKALS LLKKEFELSK LQQRLGREVE EKIKQTHRKY LLQEQLKIIK KELGLEKDDK DAI EEKFRE RLKELVVPKH VMDVVDEELS KLGLLDNHSS EFNVTRNYLD WLTSIPWGKY SNENLDLARA QAVLEEDHYG MEDV KKRIL EFIAVSQLRG STQGKILCFY GPPGVGKTSI ARSIARALNR EYFRFSVGGM TDVAEIKGHR RTYVGAMPGK IIQCL KKTK TENPLILIDE VDKIGRGYQG DPSSALLELL DPEQNANFLD HYLDVPVDLS KVLFICTANV TDTIPEPLRD RMEMIN VSG YVAQEKLAIA ERYLVPQARA LCGLDESKAK LSSDVLTLLI KQYCRESGVR NLQKQVEKVL RKSAYKIVSG EAESVEV TP ENLQDFVGKP VFTVERMYDV TPPGVVMGLA WTAMGGSTLF VETSLRRPQD KDAKGDKDGS LEVTGQLGEV MKESARIA Y TFARAFLMQH APANDYLVTS HIHLHVPEGA TPKDGPSAGC TIVTALLSLA MGRPVRQNLA MTGEVSLTGK ILPVGGIKE KTIAAKRAGV TCIVLPAENK KDFYDLAAFI TEGLEVHFVE HYREIFDIAF PDEQAEALAV ER

UniProtKB: Lon protease homolog, mitochondrial

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Macromolecule #3: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 3 / Number of copies: 6 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #4: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 4 / Number of copies: 6 / Formula: ADP
Molecular weightTheoretical: 427.201 Da
Chemical component information

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration3 mg/mL
BufferpH: 8
Component:
ConcentrationFormulaName
75.0 mMKClpotassium chloride
50.0 mMC4H11NO3Tris
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY ARRAY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 25 sec. / Pretreatment - Atmosphere: OTHER
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 298 K / Instrument: FEI VITROBOT MARK IV / Details: 5 second blot blot force 2.
DetailsSample was monodisperse with ~350 particles per image

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 4397 / Average exposure time: 1.0 sec. / Average electron dose: 54.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated magnification: 60024 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 0.4 µm / Nominal magnification: 105000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Detailsmovies were processed using motion cor 2 version 1.5.0
Particle selectionNumber selected: 1470000
Details: Template picking using templates generated from blob picker
Startup modelType of model: OTHER / Details: ab initio model generated in cryosparc
Final reconstructionNumber classes used: 1 / Resolution.type: BY AUTHOR / Resolution: 2.92 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 390517
Initial angle assignmentType: PROJECTION MATCHING
Final angle assignmentType: PROJECTION MATCHING
Final 3D classificationNumber classes: 5
Details: Ran heterogenous refinement in cryosparc to classify into open form, closed form, and trash classes
FSC plot (resolution estimation)

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