NMR structure of the E. coli ClpX chaperone zinc binding domain dimer

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 
  • Selection Criteria: structures with acceptable covalent geometry 

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Solution structure of the dimeric zinc binding domain of the chaperone ClpX.

Donaldson, L.W.Wojtyra, U.Houry, W.A.

(2003) J Biol Chem 278: 48991-48996

  • DOI: https://doi.org/10.1074/jbc.M307826200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    ClpX (423 amino acids), a member of the Clp/Hsp100 family of molecular chaperones and the protease, ClpP, comprise a multimeric complex supporting targeted protein degradation in Escherichia coli. The ClpX sequence consists of an NH2-terminal zinc binding domain (ZBD) and a COOH-terminal ATPase domain. Earlier, we have demonstrated that the zinc binding domain forms a constitutive dimer that is essential for the degradation of some ClpX substrates such as gammaO and MuA but is not required for the degradation of other substrates such as green fluorescent protein-SsrA. In this report, we present the NMR solution structure of the zinc binding domain dimer. The monomer fold reveals that ZBD is a member of the treble clef zinc finger family, a motif known to facilitate protein-ligand, protein-DNA, and protein-protein interactions. However, the dimeric ZBD structure is not related to any protein structure in the Protein Data Bank. A trimer-of-dimers model of ZBD is presented, which might reflect the closed state of the ClpX hexamer.

  • Organizational Affiliation

    Department of Biology, York University, Toronto, Ontario M3J 1P3, Canada. logand@yorku.ca

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP-dependent Clp protease ATP-binding subunit clpX
A, B
67Escherichia coli K-12Mutation(s): 0 
Gene Names: Clpx
Find proteins for P0A6H1 (Escherichia coli (strain K12))
Explore P0A6H1 
Go to UniProtKB:  P0A6H1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A6H1
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 500 
  • Conformers Submitted: 
  • Selection Criteria: structures with acceptable covalent geometry 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-12-30
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2024-05-01
    Changes: Data collection, Database references, Derived calculations