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- EMDB-4626: ClpB (DWB and K476C mutant) bound to casein in presence of ATPgam... -

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Basic information

Entry
Database: EMDB / ID: EMD-4626
TitleClpB (DWB and K476C mutant) bound to casein in presence of ATPgammaS - state KC-2A
Map dataClpB (DWB and K476C mutant) bound to a casein substrate in presence of ATPgammaS - State KC2A
Sample
  • Complex: ClpB-DWB-K476C bound to casein in presence of ATPgammaS
    • Complex: ClpB-DWB-K476C
      • Protein or peptide: Chaperone protein ClpB
    • Complex: casein
      • Protein or peptide: casein
  • Ligand: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
Keywordsdisaggregase / proteostasis / AAA / CHAPERONE
Function / homology
Function and homology information


cellular response to heat / response to heat / protein refolding / ATP hydrolysis activity / ATP binding / identical protein binding / membrane / cytosol / cytoplasm
Similarity search - Function
Chaperonin ClpB / ClpA/B, conserved site 2 / Chaperonins clpA/B signature 2. / ClpA/B, conserved site 1 / Chaperonins clpA/B signature 1. / ClpA/ClpB, AAA lid domain / AAA lid domain / Clp amino terminal domain, pathogenicity island component / : / Clp, repeat (R) domain ...Chaperonin ClpB / ClpA/B, conserved site 2 / Chaperonins clpA/B signature 2. / ClpA/B, conserved site 1 / Chaperonins clpA/B signature 1. / ClpA/ClpB, AAA lid domain / AAA lid domain / Clp amino terminal domain, pathogenicity island component / : / Clp, repeat (R) domain / Clp repeat (R) domain profile. / 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 / 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
Chaperone protein ClpB
Similarity search - Component
Biological speciesEscherichia coli (E. coli) / Bos taurus (cattle)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.8 Å
AuthorsDeville C / Saibil HR
Funding support United Kingdom, 3 items
OrganizationGrant numberCountry
Wellcome Trust106252 United Kingdom
Wellcome Trust101488 United Kingdom
Wellcome Trust079605 United Kingdom
CitationJournal: Cell Rep / Year: 2019
Title: Two-Step Activation Mechanism of the ClpB Disaggregase for Sequential Substrate Threading by the Main ATPase Motor.
Authors: Célia Deville / Kamila Franke / Axel Mogk / Bernd Bukau / Helen R Saibil /
Abstract: AAA+ proteins form asymmetric hexameric rings that hydrolyze ATP and thread substrate proteins through a central channel via mobile substrate-binding pore loops. Understanding how ATPase and ...AAA+ proteins form asymmetric hexameric rings that hydrolyze ATP and thread substrate proteins through a central channel via mobile substrate-binding pore loops. Understanding how ATPase and threading activities are regulated and intertwined is key to understanding the AAA+ protein mechanism. We studied the disaggregase ClpB, which contains tandem ATPase domains (AAA1, AAA2) and shifts between low and high ATPase and threading activities. Coiled-coil M-domains repress ClpB activity by encircling the AAA1 ring. Here, we determine the mechanism of ClpB activation by comparing ATPase mechanisms and cryo-EM structures of ClpB wild-type and a constitutively active ClpB M-domain mutant. We show that ClpB activation reduces ATPase cooperativity and induces a sequential mode of ATP hydrolysis in the AAA2 ring, the main ATPase motor. AAA1 and AAA2 rings do not work synchronously but in alternating cycles. This ensures high grip, enabling substrate threading via a processive, rope-climbing mechanism.
History
DepositionFeb 20, 2019-
Header (metadata) releaseJul 3, 2019-
Map releaseJul 3, 2019-
UpdateMay 15, 2024-
Current statusMay 15, 2024Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6qs7
  • Surface level: 0.05
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_4626.png

Downloads & links

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Map

FileDownload / File: emd_4626.map.gz / Format: CCP4 / Size: 91.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationClpB (DWB and K476C mutant) bound to a casein substrate in presence of ATPgammaS - State KC2A
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.05 Å/pix.
x 288 pix.
= 302.4 Å		1.05 Å/pix.
x 288 pix.
= 302.4 Å		1.05 Å/pix.
x 288 pix.
= 302.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.05 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.05 / Movie #1: 0.05
Minimum - Maximum-0.12165036 - 0.22796974
Average (Standard dev.)0.00036576885 (±0.009435893)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 302.4 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.051.051.05
M x/y/z288288288
origin x/y/z0.0000.0000.000
length x/y/z302.400302.400302.400
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ858858858
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS288288288
D min/max/mean-0.1220.2280.000

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Supplemental data

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Additional map: map filtered according to local resolution

Fileemd_4626_additional.map
Annotationmap filtered according to local resolution
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 1

Fileemd_4626_half_map_1.map
AnnotationHalf map 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 2

Fileemd_4626_half_map_2.map
AnnotationHalf map 2
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : ClpB-DWB-K476C bound to casein in presence of ATPgammaS

EntireName: ClpB-DWB-K476C bound to casein in presence of ATPgammaS
Components
  • Complex: ClpB-DWB-K476C bound to casein in presence of ATPgammaS
    • Complex: ClpB-DWB-K476C
      • Protein or peptide: Chaperone protein ClpB
    • Complex: casein
      • Protein or peptide: casein
  • Ligand: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
  • Ligand: MAGNESIUM ION
  • Ligand: ADENOSINE-5'-DIPHOSPHATE

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Supramolecule #1: ClpB-DWB-K476C bound to casein in presence of ATPgammaS

SupramoleculeName: ClpB-DWB-K476C bound to casein in presence of ATPgammaS
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Molecular weightTheoretical: 570 KDa

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Supramolecule #2: ClpB-DWB-K476C

SupramoleculeName: ClpB-DWB-K476C / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Escherichia coli (E. coli)

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Supramolecule #3: casein

SupramoleculeName: casein / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2
Source (natural)Organism: Bos taurus (cattle)

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Macromolecule #1: Chaperone protein ClpB

MacromoleculeName: Chaperone protein ClpB / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli (E. coli)
Molecular weightTheoretical: 95.708133 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MRLDRLTNKF QLALADAQSL ALGHDNQFIE PLHLMSALLN QEGGSVSPLL TSAGINAGQL RTDINQALNR LPQVEGTGGD VQPSQDLVR VLNLCDKLAQ KRGDNFISSE LFVLAALESR GTLADILKAA GATTANITQA IEQMRGGESV NDQGAEDQRQ A LKKYTIDL ...String:
MRLDRLTNKF QLALADAQSL ALGHDNQFIE PLHLMSALLN QEGGSVSPLL TSAGINAGQL RTDINQALNR LPQVEGTGGD VQPSQDLVR VLNLCDKLAQ KRGDNFISSE LFVLAALESR GTLADILKAA GATTANITQA IEQMRGGESV NDQGAEDQRQ A LKKYTIDL TERAEQGKLD PVIGRDEEIR RTIQVLQRRT KNNPVLIGEP GVGKTAIVEG LAQRIINGEV PEGLKGRRVL AL DMGALVA GAKYRGEFEE RLKGVLNDLA KQEGNVILFI DALHTMVGAG KADGAMDAGN MLKPALARGE LHCVGATTLD EYR QYIEKD AALERRFQKV FVAEPSVEDT IAILRGLKER YELHHHVQIT DPAIVAAATL SHRYIADRQL PDKAIDLIDE AASS IRMQI DSKPEELDRL DRRIIQLKLE QQALMKESDE ASKKRLDMLN EELSDKERQY SELEEEWKAE KASLSGTQTI CAELE QAKI AIEQARRVGD LARMSELQYG KIPELEKQLE AATQLEGKTM RLLRNKVTDA EIAEVLARWT GIPVSRMMES EREKLL RME QELHHRVIGQ NEAVDAVSNA IRRSRAGLAD PNRPIGSFLF LGPTGVGKTE LCKALANFMF DSDEAMVRID MSEFMEK HS VSRLVGAPPG YVGYEEGGYL TEAVRRRPYS VILLDAVEKA HPDVFNILLQ VLDDGRLTDG QGRTVDFRNT VVIMTSNL G SDLIQERFGE LDYAHMKELV LGVVSHNFRP EFINRIDEVV VFHPLGEQHI ASIAQIQLKR LYKRLEERGY EIHISDEAL KLLSENGYDP VYGARPLKRA IQQQIENPLA QQILSGELVP GKVIRLEVNE DRIVAVQH

UniProtKB: Chaperone protein ClpB

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Macromolecule #2: casein

MacromoleculeName: casein / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Bos taurus (cattle)
Molecular weightTheoretical: 2.060531 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)

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Macromolecule #3: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER

MacromoleculeName: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / type: ligand / ID: 3 / Number of copies: 10 / 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 #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 8 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #5: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 5 / Number of copies: 1 / 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

Concentration1.6 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
25.0 mMTris-HClTris-HCl
25.0 mMKClpotassium chloride
10.0 mMMgCl2magnesium chloride
2.0 mMATPgammaSadenosine5o3thiotriphosphate
1.0 mMDTTdithiothreitol
GridModel: Quantifoil, UltrAuFoil / Material: GOLD / Mesh: 300 / Support film - Material: GRAPHENE OXIDE / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 60 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 295 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Specialist opticsEnergy filter - Name: GIF Bioquantum
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number grids imaged: 1 / Number real images: 6060 / Average electron dose: 1.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.5 µm / Nominal defocus min: 1.5 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: 875861
Startup modelType of model: OTHER
Details: The initial model was generated using a stochastic gradient descent algorithm
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 2.1) / Number images used: 41322
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC (ver. 1)
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION (ver. 2.1)
Final 3D classificationNumber classes: 5 / Software - Name: RELION (ver. 2.1)
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

1ciu


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-6qs7:
ClpB (DWB and K476C mutant) bound to casein in presence of ATPgammaS - state KC-2A

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