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- EMDB-51367: Structure of the S.aureus MecA/ClpC/ClpP degradation system -

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Basic information

Entry
Database: EMDB / ID: EMD-51367
TitleStructure of the S.aureus MecA/ClpC/ClpP degradation system
Map dataMain S.aureus ClpC-ClpP body cryo-EM map sharpened with EMready
Sample
  • Complex: Complex of 6 copies of S.aureus ClpC (without the N terminal and M-domain) plus 14 copies of S.aureus ClpP
    • Protein or peptide: ATP-dependent Clp protease proteolytic subunit
    • Protein or peptide: Unidentified substrate of the MecA-ClpC-ClpP complex from S.aureus
    • Protein or peptide: ATP-dependent Clp protease ATP-binding subunit ClpC
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
  • Ligand: MAGNESIUM ION
Keywordsprotein-quality control / AAA+ unfoldases / peptidases / adaptor proteins / CHAPERONE
Function / homology
Function and homology information


stress response to cadmium ion / stress response to copper ion / endopeptidase Clp / endopeptidase Clp complex / ATP-dependent peptidase activity / protein quality control for misfolded or incompletely synthesized proteins / ATPase binding / serine-type endopeptidase activity / ATP hydrolysis activity / ATP binding / cytoplasm
Similarity search - Function
UVR domain / UVR domain profile. / ClpA/B, conserved site 2 / Chaperonins clpA/B signature 2. / ClpA/B, conserved site 1 / Chaperonins clpA/B signature 1. / ClpP, Ser active site / Endopeptidase Clp serine active site. / ClpA/ClpB, AAA lid domain / AAA lid domain ...UVR domain / UVR domain profile. / ClpA/B, conserved site 2 / Chaperonins clpA/B signature 2. / ClpA/B, conserved site 1 / Chaperonins clpA/B signature 1. / ClpP, Ser active site / Endopeptidase Clp serine active site. / ClpA/ClpB, AAA lid domain / AAA lid domain / Clp amino terminal domain, pathogenicity island component / ClpP, histidine active site / Endopeptidase Clp histidine active site. / Clp, repeat (R) domain / Clp repeat (R) domain profile. / : / ATP-dependent Clp protease proteolytic subunit / Clp protease proteolytic subunit /Translocation-enhancing protein TepA / Clp protease / Clp, N-terminal domain superfamily / ClpA/B family / Clp ATPase, C-terminal / AAA domain (Cdc48 subfamily) / C-terminal, D2-small domain, of ClpB protein / C-terminal, D2-small domain, of ClpB protein / ClpP/crotonase-like domain superfamily / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ATP-dependent Clp protease proteolytic subunit / ATP-dependent Clp protease ATP-binding subunit ClpC
Similarity search - Component
Biological speciesStaphylococcus aureus (bacteria) / Escherichia coli (E. coli)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.0 Å
AuthorsAzinas S / Wallden K / Katikaridis P / Schahl A / Mogk A / Carroni M
Funding support Sweden, 1 items
OrganizationGrant numberCountry
Knut and Alice Wallenberg Foundation Sweden
CitationJournal: To Be Published
Title: ClpC and ClpP act as reciprocal allosteric activators to form a highly efficient AAA+ protease
Authors: Azinas S / Wallden K / Katikaridis P / Schahl A / Mogk A / Carroni M
History
DepositionAug 16, 2024-
Header (metadata) releaseAug 20, 2025-
Map releaseAug 20, 2025-
UpdateAug 20, 2025-
Current statusAug 20, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_51367.png

Downloads & links

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Map

FileDownload / File: emd_51367.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMain S.aureus ClpC-ClpP body cryo-EM map sharpened with EMready
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 400 pix.
= 423.6 Å		1.06 Å/pix.
x 400 pix.
= 423.6 Å		1.06 Å/pix.
x 400 pix.
= 423.6 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.059 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.744
Minimum - Maximum-0.5029709 - 19.733746
Average (Standard dev.)0.017507242 (±0.5565652)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 423.6 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Main S.aureus ClpC-ClpP body cryo-EM map unsharpened

Fileemd_51367_additional_1.map
AnnotationMain S.aureus ClpC-ClpP body cryo-EM map unsharpened
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Main S.aureus ClpC-ClpP body cryo-EM map halfmap B

Fileemd_51367_half_map_1.map
AnnotationMain S.aureus ClpC-ClpP body cryo-EM map halfmap B
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Main S.aureus ClpC-ClpP body cryo-EM map halfmap A

Fileemd_51367_half_map_2.map
AnnotationMain S.aureus ClpC-ClpP body cryo-EM map halfmap 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 : Complex of 6 copies of S.aureus ClpC (without the N terminal and ...

EntireName: Complex of 6 copies of S.aureus ClpC (without the N terminal and M-domain) plus 14 copies of S.aureus ClpP
Components
  • Complex: Complex of 6 copies of S.aureus ClpC (without the N terminal and M-domain) plus 14 copies of S.aureus ClpP
    • Protein or peptide: ATP-dependent Clp protease proteolytic subunit
    • Protein or peptide: Unidentified substrate of the MecA-ClpC-ClpP complex from S.aureus
    • Protein or peptide: ATP-dependent Clp protease ATP-binding subunit ClpC
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
  • Ligand: MAGNESIUM ION

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Supramolecule #1: Complex of 6 copies of S.aureus ClpC (without the N terminal and ...

SupramoleculeName: Complex of 6 copies of S.aureus ClpC (without the N terminal and M-domain) plus 14 copies of S.aureus ClpP
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Staphylococcus aureus (bacteria)
Molecular weightTheoretical: 800 KDa

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Macromolecule #1: ATP-dependent Clp protease proteolytic subunit

MacromoleculeName: ATP-dependent Clp protease proteolytic subunit / type: protein_or_peptide / ID: 1 / Number of copies: 14 / Enantiomer: LEVO / EC number: endopeptidase Clp
Source (natural)Organism: Staphylococcus aureus (bacteria)
Molecular weightTheoretical: 21.536531 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MNLIPTVIET TNRGERAYDI YSRLLKDRII MLGSQIDDNV ANSIVSQLLF LQAQDSEKDI YLYINSPGGS VTAGFAIYDT IQHIKPDVQ TICIGMAASM GSFLLAAGAK GKRFALPNAE VMIHQPLGGA QGQATEIEIA ANHILKTREK LNRILSERTG Q SIEKIQKD ...String:
MNLIPTVIET TNRGERAYDI YSRLLKDRII MLGSQIDDNV ANSIVSQLLF LQAQDSEKDI YLYINSPGGS VTAGFAIYDT IQHIKPDVQ TICIGMAASM GSFLLAAGAK GKRFALPNAE VMIHQPLGGA QGQATEIEIA ANHILKTREK LNRILSERTG Q SIEKIQKD TDRDNFLTAE EAKEYGLIDE VMVPETK

UniProtKB: ATP-dependent Clp protease proteolytic subunit

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Macromolecule #2: Unidentified substrate of the MecA-ClpC-ClpP complex from S.aureus

MacromoleculeName: Unidentified substrate of the MecA-ClpC-ClpP complex from S.aureus
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 2.400951 KDa
SequenceString:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)

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Macromolecule #3: ATP-dependent Clp protease ATP-binding subunit ClpC

MacromoleculeName: ATP-dependent Clp protease ATP-binding subunit ClpC / type: protein_or_peptide / ID: 3 / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Staphylococcus aureus (bacteria)
Molecular weightTheoretical: 91.170352 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MLFGRLTERA QRVLAHAQEE AIRLNHSNIG TEHLLLGLMK EPEGIAAKVL ESFNITEDKV IEEVEKLIGH GQDHVGTLHY TPRAKKVIE LSMDEARKLH HNFVGTEHIL LGLIRENEGV AARVFANLDL NITKARAQVV KALGNPEMSN KNAQASKSNN T PTLDSLAR ...String:
MLFGRLTERA QRVLAHAQEE AIRLNHSNIG TEHLLLGLMK EPEGIAAKVL ESFNITEDKV IEEVEKLIGH GQDHVGTLHY TPRAKKVIE LSMDEARKLH HNFVGTEHIL LGLIRENEGV AARVFANLDL NITKARAQVV KALGNPEMSN KNAQASKSNN T PTLDSLAR DLTVIAKDGT LDPVIGRDKE ITRVIEVLSR RTKNNPVLIG EPGVGKTAIA EGLAQAIVNN EVPETLKDKR VM SLDMGTV VAGTKYRGEF EERLKKVMEE IQQAGNVILF IDELHTLVGA GGAEGAIDAS NILKPALARG ELQCIGATTL DEY RKNIEK DAALERRFQP VQVDEPSVVD TVAILKGLRD RYEAHHRINI SDEAIEAAVK LSNRYVSDRF LPDKAIDLID EASS KVRLK SHTTPNNLKE IEQEIEKVKN EKDAAVHAQE FENAANLRDK QTKLEKQYEE AKNEWKNAQN GMSTSLSEED IAEVI AGWT GIPLTKINET ESEKLLSLED TLHERVIGQK DAVNSISKAV RRARAGLKDP KRPIGSFIFL GPTGVGKTEL ARALAE SMF GDDDAMIRVD MSEFMEKHAV SRLVGAPPGY VGHDDGGQLT EKVRRKPYSV ILFDEIEKAH PDVFNILLQV LDDGHLT DT KGRTVDFRNT IIIMTSNVGA QELQDQRFAG FGGSSDGQDY ETIRKTMLKE LKNSFRPEFL NRVDDIIVFH KLTKEELK E IVTMMVNKLT NRLSEQNINI IVTDKAKDKI AEEGYDPEYG ARPLIRAIQK TIEDNLSELI LDGNQIEGKK VTVDHDGKE FKYDIAEQTS ETKTPSQA

UniProtKB: ATP-dependent Clp protease ATP-binding subunit ClpC

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Macromolecule #4: ADENOSINE-5'-DIPHOSPHATE

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

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

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Macromolecule #5: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER

MacromoleculeName: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / type: ligand / ID: 5 / Number of copies: 6 / Formula: AGS
Molecular weightTheoretical: 523.247 Da
Chemical component information

ChemComp-AGS:
PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / ATP-gamma-S, energy-carrying molecule analogue*YM

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Macromolecule #6: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 6 / Number of copies: 7 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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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

Concentration1.5 mg/mL
BufferpH: 7.4
GridModel: Quantifoil R2/2 / Material: COPPER / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 40 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
SoftwareName: EPU (ver. 3.7)
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsCalibrated defocus max: 2.6 µm / Calibrated defocus min: 0.5 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.6 µm
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

Particle selectionNumber selected: 2851121
CTF correctionSoftware - Name: cryoSPARC (ver. 4.3) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.0 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. 4.3) / Number images used: 48011
Initial angle assignmentType: OTHER / Details: SGD
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 4.3)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelChain - Source name: AlphaFold / Chain - Initial model type: in silico model
Output model

PDB-9gi1:
Structure of the S.aureus MecA/ClpC/ClpP degradation system

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