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- EMDB-23206: CryoEM map of the Mycobacterium tuberculosis ClpB disaggregase he... -

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Basic information

Entry
Database: EMDB / ID: EMD-23206
TitleCryoEM map of the Mycobacterium tuberculosis ClpB disaggregase hexamer with three locally refined ClpB middle domains and three DnaK nucleotide binding domains
Map dataStructural model of ClpB with three DnaK nucleotide-binding domains
Sample
  • Complex: ClpB/DnaK complex
    • Protein or peptide: Chaperone protein ClpB
    • Protein or peptide: Substrate
    • Protein or peptide: Chaperone protein DnaK
  • Ligand: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
KeywordsClpB-DnaK complex / protein aggregates / Unfold / Refold / CHAPERONE
Function / homology
Function and homology information


ATP-dependent protein folding chaperone / unfolded protein binding / cellular response to heat / protein refolding / hydrolase activity / ATP hydrolysis activity / ATP binding / cytoplasm
Similarity search - Function
Chaperonin ClpB / Chaperone DnaK / 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 repeat (R) N-terminal domain / : ...Chaperonin ClpB / Chaperone DnaK / 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 repeat (R) N-terminal domain / : / Clp, repeat (R) domain / Clp repeat (R) domain profile. / Clp, N-terminal domain superfamily / ClpA/B family / Clp ATPase, C-terminal / C-terminal, D2-small domain, of ClpB protein / C-terminal, D2-small domain, of ClpB protein / AAA domain (Cdc48 subfamily) / Heat shock hsp70 proteins family signature 2. / Heat shock hsp70 proteins family signature 1. / Heat shock hsp70 proteins family signature 3. / Heat shock protein 70, conserved site / Heat shock protein 70kD, peptide-binding domain superfamily / Heat shock protein 70kD, C-terminal domain superfamily / Heat shock protein 70 family / Hsp70 protein / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / ATPase, nucleotide binding domain / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Chaperone protein DnaK / Chaperone protein ClpB
Similarity search - Component
Biological speciesMycobacterium tuberculosis (bacteria)
Methodsingle particle reconstruction / Resolution: 7.0 Å
AuthorsYin YY / Feng X / Li H
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Center for Complementary and Integrative Health (NIH/NCCIH)AI070285 United States
CitationJournal: Cell Rep / Year: 2021
Title: Structural basis for aggregate dissolution and refolding by the Mycobacterium tuberculosis ClpB-DnaK bi-chaperone system.
Authors: Yanting Yin / Xiang Feng / Hongjun Yu / Allison Fay / Amanda Kovach / Michael S Glickman / Huilin Li /
Abstract: The M. tuberculosis (Mtb) ClpB is a protein disaggregase that helps to rejuvenate the bacterial cell. DnaK is a protein foldase that can function alone, but it can also bind to the ClpB hexamer to ...The M. tuberculosis (Mtb) ClpB is a protein disaggregase that helps to rejuvenate the bacterial cell. DnaK is a protein foldase that can function alone, but it can also bind to the ClpB hexamer to physically couple protein disaggregation with protein refolding, although the molecular mechanism is not well understood. Here, we report the cryo-EM analysis of the Mtb ClpB-DnaK bi-chaperone in the presence of ATPγS and a protein substrate. We observe three ClpB conformations in the presence of DnaK, identify a conserved TGIP loop linking the oligonucleotide/oligosaccharide-binding domain and the nucleotide-binding domain that is important for ClpB function, derive the interface between the regulatory middle domain of the ClpB and the DnaK nucleotide-binding domain, and find that DnaK binding stabilizes, but does not bend or tilt, the ClpB middle domain. We propose a model for the synergistic actions of aggregate dissolution and refolding by the Mtb ClpB-DnaK bi-chaperone system.
History
DepositionDec 23, 2020-
Header (metadata) releaseMay 26, 2021-
Map releaseMay 26, 2021-
UpdateMay 29, 2024-
Current statusMay 29, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 7.1
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 7.1
  • Imaged by UCSF Chimera
  • Download
  • Surface view with fitted model
  • Atomic models: PDB-7l6n
  • Surface level: 7.1
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_23206.png

Downloads & links

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Map

FileDownload / File: emd_23206.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationStructural model of ClpB with three DnaK nucleotide-binding domains
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesX (Sec.)Y (Row.)Z (Col.)
1.07 Å/pix.
x 360 pix.
= 386.64 Å		1.07 Å/pix.
x 360 pix.
= 386.64 Å		1.07 Å/pix.
x 360 pix.
= 386.64 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.074 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 7.1 / Movie #1: 7.1
Minimum - Maximum-13.83258 - 50.570022999999999
Average (Standard dev.)0.04248723 (±1.5097843)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderZYX
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 386.64 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0741.0741.074
M x/y/z360360360
origin x/y/z0.0000.0000.000
length x/y/z386.640386.640386.640
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ360360360
MAP C/R/S321
start NC/NR/NS000
NC/NR/NS360360360
D min/max/mean-13.83350.5700.042

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Supplemental data

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Sample components

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Entire : ClpB/DnaK complex

EntireName: ClpB/DnaK complex
Components
  • Complex: ClpB/DnaK complex
    • Protein or peptide: Chaperone protein ClpB
    • Protein or peptide: Substrate
    • Protein or peptide: Chaperone protein DnaK
  • Ligand: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER
  • Ligand: ADENOSINE-5'-DIPHOSPHATE

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Supramolecule #1: ClpB/DnaK complex

SupramoleculeName: ClpB/DnaK complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Mycobacterium tuberculosis (bacteria)

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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: Mycobacterium tuberculosis (bacteria)
Molecular weightTheoretical: 92.688281 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MDSFNPTTKT QAALTAALQA ASTAGNPEIR PAHLLMALLT QNDGIAAPLL EAVGVEPATV RAETQRLLDR LPQATGASTQ PQLSRESLA AITTAQQLAT ELDDEYVSTE HVMVGLATGD SDVAKLLTGH GASPQALREA FVKVRGSARV TSPEPEATYQ A LQKYSTDL ...String:
MDSFNPTTKT QAALTAALQA ASTAGNPEIR PAHLLMALLT QNDGIAAPLL EAVGVEPATV RAETQRLLDR LPQATGASTQ PQLSRESLA AITTAQQLAT ELDDEYVSTE HVMVGLATGD SDVAKLLTGH GASPQALREA FVKVRGSARV TSPEPEATYQ A LQKYSTDL TARAREGKLD PVIGRDNEIR RVVQVLSRRT KNNPVLIGEP GVGKTAIVEG LAQRIVAGDV PESLRDKTIV AL DLGSMVA GSKYRGEFEE RLKAVLDDIK NSAGQIITFI DELHTIVGAG ATGEGAMDAG NMIKPMLARG ELRLVGATTL DEY RKHIEK DAALERRFQQ VYVGEPSVED TIGILRGLKD RYEVHHGVRI TDSALVAAAT LSDRYITARF LPDKAIDLVD EAAS RLRME IDSRPVEIDE VERLVRRLEI EEMALSKEED EASAERLAKL RSELADQKEK LAELTTRWQN EKNAIEIVRD LKEQL EALR GESERAERDG DLAKAAELRY GRIPEVEKKL DAALPQAQAR EQVMLKEEVG PDDIADVVSA WTGIPAGRLL EGETAK LLR MEDELGKRVI GQKAAVTAVS DAVRRSRAGV SDPNRPTGAF MFLGPTGVGK TELAKALADF LFDDERAMVR IDMSEYG EK HTVARLIGAP PGYVGYEAGG QLTEAVRRRP YTVVLFDEIE KAHPDVFDVL LQVLDEGRLT DGHGRTVDFR NTILILTS N LGSGGSAEQV LAAVRATFKP EFINRLDDVL IFEGLNPEEL VRIVDIQLAQ LGKRLAQRRL QLQVSLPAKR WLAQRGFDP VYGARPLRRL VQQAIGDQLA KMLLAGQVHD GDTVPVNVSP DADSLILG

UniProtKB: Chaperone protein ClpB

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Macromolecule #2: Substrate

MacromoleculeName: Substrate / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Mycobacterium tuberculosis (bacteria)
Molecular weightTheoretical: 2.826475 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
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)(UNK) (UNK)(UNK)(UNK) (UNK)

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Macromolecule #3: Chaperone protein DnaK

MacromoleculeName: Chaperone protein DnaK / type: protein_or_peptide / ID: 3 / Number of copies: 3 / Enantiomer: LEVO
Source (natural)Organism: Mycobacterium tuberculosis (bacteria)
Molecular weightTheoretical: 66.91068 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MARAVGIDLG TTNSVVSVLE GGDPVVVANS EGSRTTPSIV AFARNGEVLV GQPAKNQAVT NVDRTVRSVK RHMGSDWSIE IDGKKYTAP EISARILMKL KRDAEAYLGE DITDAVITTP AYFNDAQRQA TKDAGQIAGL NVLRIVNEPT AAALAYGLDK G EKEQRILV ...String:
MARAVGIDLG TTNSVVSVLE GGDPVVVANS EGSRTTPSIV AFARNGEVLV GQPAKNQAVT NVDRTVRSVK RHMGSDWSIE IDGKKYTAP EISARILMKL KRDAEAYLGE DITDAVITTP AYFNDAQRQA TKDAGQIAGL NVLRIVNEPT AAALAYGLDK G EKEQRILV FDLGGGTFDV SLLEIGEGVV EVRATSGDNH LGGDDWDQRV VDWLVDKFKG TSGIDLTKDK MAMQRLREAA EK AKIELSS SQSTSINLPY ITVDADKNPL FLDEQLTRAE FQRITQDLLD RTRKPFQSVI ADTGISVSEI DHVVLVGGST RMP AVTDLV KELTGGKEPN KGVNPDEVVA VGAALQAGVL KGEVKDVLLL DVTPLSLGIE TKGGVMTRLI ERNTTIPTKR SETF TTADD NQPSVQIQVY QGEREIAAHN KLLGSFELTG IPPAPRGIPQ IEVTFDIDAN GIVHVTAKDK GTGKENTIRI QEGSG LSKE DIDRMIKDAE AHAEEDRKRR EEADVRNQAE TLVYQTEKFV KEQREAEGGS KVPEDTLNKV DAAVAEAKAA LGGSDI SAI KSAMEKLGQE SQALGQAIYE AAQAASQATG AAHPGGEPGG AHPGSADDVV DAEVVDDGRE AK

UniProtKB: Chaperone protein DnaK

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Macromolecule #4: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER

MacromoleculeName: PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER / type: ligand / ID: 4 / 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 #5: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 5 / Number of copies: 2 / 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

Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 8

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 2.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: DIFFRACTION
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: EMDB MAP
Final reconstructionResolution.type: BY AUTHOR / Resolution: 7.0 Å / Resolution method: OTHER
Details: Phenix.combine_focused_maps was used to generate the composite map from several local refined maps. The reported resolution is the worst resolution in the local maps.
Number images used: 45000
Initial angle assignmentType: NOT APPLICABLE
Final angle assignmentType: ANGULAR RECONSTITUTION

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