Focus classification structure of the hyperactive ClpB mutant K476C, bound to casein, post-state

Experimental Data Snapshot

  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


Structural basis for substrate gripping and translocation by the ClpB AAA+ disaggregase.

Rizo, A.N.Lin, J.Gates, S.N.Tse, E.Bart, S.M.Castellano, L.M.DiMaio, F.Shorter, J.Southworth, D.R.

(2019) Nat Commun 10: 2393-2393

  • DOI: https://doi.org/10.1038/s41467-019-10150-y
  • Primary Citation of Related Structures:  
    6OAX, 6OAY, 6OG1, 6OG2, 6OG3

  • PubMed 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) 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.

  • Organizational Affiliation

    Graduate Program in Chemical Biology, University of Michigan, Ann Arbor, MI, 48109, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Hyperactive disaggregase ClpBA [auth F],
B [auth A]
867Escherichia coli K-12Mutation(s): 0 
Gene Names: clpBhtpMb2592JW2573
Find proteins for P63284 (Escherichia coli (strain K12))
Explore P63284 
Go to UniProtKB:  P63284
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP63284
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-06-12
    Type: Initial release
  • Version 1.1: 2019-06-19
    Changes: Data collection, Database references