[English] 日本語
![](img/lk-miru.gif)
- EMDB-20050: CryoEM focus classification map of the hyperactive ClpB mutant K4... -
+
Open data
-
Basic information
Entry | Database: EMDB / ID: EMD-20050 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Title | CryoEM focus classification map of the hyperactive ClpB mutant K476C, bound to casein, post-state | |||||||||
![]() | EM focus classification map of the hyperactive ClpB mutant K476C, bound to casein, post-state | |||||||||
![]() |
| |||||||||
![]() | disaggregase / CLPB / AAA+ / CHAPERONE | |||||||||
Function / homology | ![]() cellular response to heat / response to heat / protein refolding / ATP hydrolysis activity / ATP binding / identical protein binding / membrane / cytosol / cytoplasm Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 4.1 Å | |||||||||
![]() | Rizo AR / Lin J-B | |||||||||
![]() | ![]() Title: Structural basis for substrate gripping and translocation by the ClpB AAA+ disaggregase. Authors: Alexandrea N Rizo / JiaBei Lin / Stephanie N Gates / Eric Tse / Stephen M Bart / Laura M Castellano / Frank DiMaio / James Shorter / Daniel R Southworth / ![]() Abstract: Bacterial ClpB and yeast Hsp104 are homologous Hsp100 protein disaggregases that serve critical functions in proteostasis by solubilizing protein aggregates. Two AAA+ nucleotide binding domains (NBDs) ...Bacterial ClpB and yeast Hsp104 are homologous Hsp100 protein disaggregases that serve critical functions in proteostasis by solubilizing protein aggregates. Two AAA+ nucleotide binding domains (NBDs) power polypeptide translocation through a central channel comprised of a hexameric spiral of protomers that contact substrate via conserved pore-loop interactions. Here we report cryo-EM structures of a hyperactive ClpB variant bound to the model substrate, casein in the presence of slowly hydrolysable ATPγS, which reveal the translocation mechanism. Distinct substrate-gripping interactions are identified for NBD1 and NBD2 pore loops. A trimer of N-terminal domains define a channel entrance that binds the polypeptide substrate adjacent to the topmost NBD1 contact. NBD conformations at the seam interface reveal how ATP hydrolysis-driven substrate disengagement and re-binding are precisely tuned to drive a directional, stepwise translocation cycle. | |||||||||
History |
|
-
Structure visualization
Movie |
![]() |
---|---|
Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
-
Downloads & links
-EMDB archive
Map data | ![]() | 4.2 MB | ![]() | |
---|---|---|---|---|
Header (meta data) | ![]() ![]() | 10.8 KB 10.8 KB | Display Display | ![]() |
Images | ![]() | 25.7 KB | ||
Filedesc metadata | ![]() | 5.5 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6og2MC ![]() 6oaxC ![]() 6oayC ![]() 6og1C ![]() 6og3C C: citing same article ( M: atomic model generated by this map |
---|---|
Similar structure data |
-
Links
EMDB pages | ![]() ![]() |
---|---|
Related items in Molecule of the Month |
-
Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Annotation | EM focus classification map of the hyperactive ClpB mutant K476C, bound to casein, post-state | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.032 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
|
-Supplemental data
-
Sample components
-Entire : hyperactive disaggregase ClpB K476C, bound to casein
Entire | Name: hyperactive disaggregase ClpB K476C, bound to casein |
---|---|
Components |
|
-Supramolecule #1: hyperactive disaggregase ClpB K476C, bound to casein
Supramolecule | Name: hyperactive disaggregase ClpB K476C, bound to casein / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
---|---|
Source (natural) | Organism: ![]() ![]() |
-Macromolecule #1: Hyperactive disaggregase ClpB
Macromolecule | Name: Hyperactive disaggregase ClpB / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO |
---|---|
Source (natural) | Organism: ![]() ![]() |
Molecular weight | Theoretical: 97.018469 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: MRLDRLTNKF QLALADAQSL ALGHDNQFIE PLHLMSALLN QEGGSVSPLL TSAGINAGQL RTDINQALNR LPQVEGTGGD VQPSQDLVR VLNLCDNVAQ KRGDNFISSE LFVLAALESR GTVADILKAA GATTANITQA IEQMRGGESV NDQGAEDQRQ A LKKYTIDL ...String: MRLDRLTNKF QLALADAQSL ALGHDNQFIE PLHLMSALLN QEGGSVSPLL TSAGINAGQL RTDINQALNR LPQVEGTGGD VQPSQDLVR VLNLCDNVAQ KRGDNFISSE LFVLAALESR GTVADILKAA GATTANITQA IEQMRGGESV NDQGAEDQRQ A LKKYTIDL TERAEQGKLD PVIGRDEEIR RTIQVLQRRT KNNPVLIGEP GVGKTAIVEG LAQRIINGEV PEGLKGRRVL AL DMGALVA GAKYRGEFEE RLKGVLNDLA KQEGNVILFI DELHTMVGAG KADGAMDAGN MLKPALARGE LHCVGATTLD EYR QYIEKD AALERRFQKV FVAEPSVEDT IAILRGLKER YELHHHVQIT DPAIVAAATL SHRYIADRQL PDKAIDLIDE AASS IRMQI DSKPEELDRL DRRIIQLKLE QQALMKESDE ASKKRLDMLN EELSDKERQY SELEEEWKAE KASLSGTQTI KCELE QAKI AIEQARRVGD LARMSELQYG KIPELEKQLE AATQLEGKTM RLLRNKVTDA EIAEVLARWT GIPVSRMMES EREKLL RME QELHHRVIGQ NEAVDAVSNA IRRSRAGLAD PNRPIGSFLF LGPTGVGKTE LCKALANFMF DSDEAMVRID MSEFMEK HS VSRLVGAPPG YVGYEEGGYL TEAVRRRPYS VILLDEVEKA HPDVFNILLQ VLDDGRLTDG QGRTVDFRNT VVIMTSNL G SDLIQERFGE LDYAHMKELV LGVVSHNFRP EFINRIDEVV VFHPLGEQHI ASIAQIQLKR LYKRLEERGY EIHISDEAL KLLSENGYDP VYGARPLKRA IQQQIENPLA QQILSGELVP GKVIRLEVNE DRIVAVQRSR SHHHHHH |
-Macromolecule #2: ADENOSINE-5'-DIPHOSPHATE
Macromolecule | Name: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 2 / Number of copies: 3 / Formula: ADP |
---|---|
Molecular weight | Theoretical: 427.201 Da |
Chemical component information | ![]() ChemComp-ADP: |
-Experimental details
-Structure determination
Method | cryo EM |
---|---|
![]() | single particle reconstruction |
Aggregation state | particle |
-
Sample preparation
Buffer | pH: 7.4 |
---|---|
Grid | Details: unspecified |
Vitrification | Cryogen name: ETHANE |
-
Electron microscopy
Microscope | FEI TITAN KRIOS |
---|---|
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 56.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
-
Image processing
Startup model | Type of model: INSILICO MODEL |
---|---|
Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 4.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 91601 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD |