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- PDB-6pp6: ClpX in ClpX-ClpP complex bound to substrate and ATP-gamma-S, class 3 -

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Basic information

Entry
Database: PDB / ID: 6pp6
TitleClpX in ClpX-ClpP complex bound to substrate and ATP-gamma-S, class 3
Components
  • ATP-dependent Clp protease ATP-binding subunit ClpX
  • substrate peptide
KeywordsCHAPERONE / Protein degradation / AAA+ protease complex
Function / homology
Function and homology information


protein denaturation / HslUV protease complex / endopeptidase Clp complex / ATP-dependent peptidase activity / protein unfolding / proteolysis involved in protein catabolic process / ATP-dependent protein folding chaperone / disordered domain specific binding / unfolded protein binding / protein folding ...protein denaturation / HslUV protease complex / endopeptidase Clp complex / ATP-dependent peptidase activity / protein unfolding / proteolysis involved in protein catabolic process / ATP-dependent protein folding chaperone / disordered domain specific binding / unfolded protein binding / protein folding / peptidase activity / protease binding / protein dimerization activity / cell division / ATP hydrolysis activity / zinc ion binding / ATP binding / identical protein binding / cytosol
Similarity search - Function
Zinc finger, ClpX C4-type superfamily / ClpX C4-type zinc finger / Clp protease, ATP-binding subunit ClpX / Zinc finger, ClpX C4-type / Clp protease, ATP-binding subunit ClpX, bacteria / ClpX zinc binding (ZB) domain profile. / ClpX C4-type zinc finger / : / Clp ATPase, C-terminal / AAA domain (Cdc48 subfamily) ...Zinc finger, ClpX C4-type superfamily / ClpX C4-type zinc finger / Clp protease, ATP-binding subunit ClpX / Zinc finger, ClpX C4-type / Clp protease, ATP-binding subunit ClpX, bacteria / ClpX zinc binding (ZB) domain profile. / ClpX C4-type zinc finger / : / Clp ATPase, C-terminal / AAA domain (Cdc48 subfamily) / C-terminal, D2-small domain, of ClpB protein / C-terminal, D2-small domain, of ClpB protein / 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
ADENOSINE-5'-DIPHOSPHATE / PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / ATP-dependent Clp protease ATP-binding subunit ClpX / ATP-dependent Clp protease ATP-binding subunit ClpX
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.28 Å
AuthorsFei, X. / Jenni, S. / Harrison, S.C. / Sauer, R.T.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM-101988 United States
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Elife / Year: 2020
Title: Structures of the ATP-fueled ClpXP proteolytic machine bound to protein substrate.
Authors: Xue Fei / Tristan A Bell / Simon Jenni / Benjamin M Stinson / Tania A Baker / Stephen C Harrison / Robert T Sauer /
Abstract: ClpXP is an ATP-dependent protease in which the ClpX AAA+ motor binds, unfolds, and translocates specific protein substrates into the degradation chamber of ClpP. We present cryo-EM studies of the ...ClpXP is an ATP-dependent protease in which the ClpX AAA+ motor binds, unfolds, and translocates specific protein substrates into the degradation chamber of ClpP. We present cryo-EM studies of the enzyme that show how asymmetric hexameric rings of ClpX bind symmetric heptameric rings of ClpP and interact with protein substrates. Subunits in the ClpX hexamer assume a spiral conformation and interact with two-residue segments of substrate in the axial channel, as observed for other AAA+ proteases and protein-remodeling machines. Strictly sequential models of ATP hydrolysis and a power stroke that moves two residues of the substrate per translocation step have been inferred from these structural features for other AAA+ unfoldases, but biochemical and single-molecule biophysical studies indicate that ClpXP operates by a probabilistic mechanism in which five to eight residues are translocated for each ATP hydrolyzed. We propose structure-based models that could account for the functional results.
History
DepositionJul 5, 2019Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 11, 2020Provider: repository / Type: Initial release
Revision 1.1Mar 20, 2024Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / em_3d_fitting_list / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_3d_fitting_list.accession_code / _em_3d_fitting_list.initial_refinement_model_id / _em_3d_fitting_list.source_name / _em_3d_fitting_list.type

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Structure visualization

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Assembly

Deposited unit
A: ATP-dependent Clp protease ATP-binding subunit ClpX
B: ATP-dependent Clp protease ATP-binding subunit ClpX
C: ATP-dependent Clp protease ATP-binding subunit ClpX
D: ATP-dependent Clp protease ATP-binding subunit ClpX
E: ATP-dependent Clp protease ATP-binding subunit ClpX
F: ATP-dependent Clp protease ATP-binding subunit ClpX
S: substrate peptide
hetero molecules


Theoretical massNumber of molelcules
Total (without water)242,72113
Polymers239,6787
Non-polymers3,0436
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein
ATP-dependent Clp protease ATP-binding subunit ClpX


Mass: 39835.129 Da / Num. of mol.: 6 / Mutation: E185Q
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: clpX, BUE81_06555 / Production host: Escherichia coli (E. coli) / Strain (production host): ER2566 / References: UniProt: A0A1Q9L861, UniProt: P0A6H1*PLUS
#2: Protein/peptide substrate peptide


Mass: 666.791 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Production host: Escherichia coli (E. coli) / Strain (production host): ER2566
#3: Chemical
ChemComp-AGS / PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / ATP-GAMMA-S / ADENOSINE 5'-(3-THIOTRIPHOSPHATE) / ADENOSINE 5'-(GAMMA-THIOTRIPHOSPHATE) / ADENOSINE-5'-DIPHOSPHATE MONOTHIOPHOSPHATE


Mass: 523.247 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: C10H16N5O12P3S / Comment: ATP-gamma-S, energy-carrying molecule analogue*YM
#4: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 1 / 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: ClpX-ClpP-substrate-ATPrS / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Escherichia coli (E. coli) / Strain: ER2566
Source (recombinant)Organism: Escherichia coli (E. coli) / Strain: ER2566
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: GATAN CRYOPLUNGE 3 / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 298 K

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TECNAI ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: OTHER
Electron lensMode: BRIGHT FIELD / Nominal magnification: 36000 X / Nominal defocus min: -800 nm / Calibrated defocus max: -2500 nm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 60 sec. / Electron dose: 56 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 2

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Processing

SoftwareName: PHENIX / Version: 1.14_3260: / Classification: refinement
EM software
IDNameVersionCategory
2SerialEMimage acquisition
4CTFFIND4.1.12CTF correction
7UCSF Chimeramodel fitting
9PHENIXmodel refinement
10RELION2initial Euler assignment
11RELION2final Euler assignment
12RELION2classification
13RELION23D reconstruction
Image processingDetails: 2X binned and motioncor2 corrected
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 4.28 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 115751 / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingPDB-ID: 3HWS

3hws


Pdb chain-ID: A / Accession code: 3HWS / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00231614
ELECTRON MICROSCOPYf_angle_d0.64657563
ELECTRON MICROSCOPYf_dihedral_angle_d9.45212333
ELECTRON MICROSCOPYf_chiral_restr0.0422527
ELECTRON MICROSCOPYf_plane_restr0.0044679

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