6EM9

S.aureus ClpC resting state, asymmetric map


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Regulatory coiled-coil domains promote head-to-head assemblies of AAA+ chaperones essential for tunable activity control.

Carroni, M.Franke, K.B.Maurer, M.Jager, J.Hantke, I.Gloge, F.Linder, D.Gremer, S.Turgay, K.Bukau, B.Mogk, A.

(2017) Elife 6: --

  • DOI: 10.7554/eLife.30120
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ring-forming AAA+ chaperones exert ATP-fueled substrate unfolding by threading through a central pore. This activity is potentially harmful requiring mechanisms for tight repression and substrate-specific activation. The AAA+ chaperone ClpC with the ...

    Ring-forming AAA+ chaperones exert ATP-fueled substrate unfolding by threading through a central pore. This activity is potentially harmful requiring mechanisms for tight repression and substrate-specific activation. The AAA+ chaperone ClpC with the peptidase ClpP forms a bacterial protease essential to virulence and stress resistance. The adaptor MecA activates ClpC by targeting substrates and stimulating ClpC ATPase activity. We show how ClpC is repressed in its ground state by determining ClpC cryo-EM structures with and without MecA. ClpC forms large two-helical assemblies that associate via head-to-head contacts between coiled-coil middle domains (MDs). MecA converts this resting state to an active planar ring structure by binding to MD interaction sites. Loss of ClpC repression in MD mutants causes constitutive activation and severe cellular toxicity. These findings unravel an unexpected regulatory concept executed by coiled-coil MDs to tightly control AAA+ chaperone activity.


    Organizational Affiliation

    Swedish Cryo-EM Facility, Science for Life Laboratory Stockholm University, Solna, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-dependent Clp protease ATP-binding subunit ClpC
A, B, C, D, E, F, G, I, H, L
818Staphylococcus aureus (strain bovine RF122 / ET3-1)Mutation(s): 0 
Gene Names: clpC
Find proteins for Q2YSD6 (Staphylococcus aureus (strain bovine RF122 / ET3-1))
Go to UniProtKB:  Q2YSD6
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 8.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Germany--

Revision History 

  • Version 1.0: 2017-12-27
    Type: Initial release
  • Version 1.1: 2018-10-03
    Type: Data collection, Other
  • Version 1.2: 2018-11-28
    Type: Data collection, Database references