Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15.63 kDa 
• Atom Count: 596 
• Modelled Residue Count: 76 
• Deposited Residue Count: 134 
• Unique protein chains: 1

1OVX

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

• DOI: 10.2210/pdb1OVX/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2003-03-27 Released: 2003-12-30 
• Deposition Author(s): Donaldson, L.W., Kwan, J., Wojtyra, U., Houry, W.A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 1 
• Selection Criteria: structures with acceptable covalent geometry 

Literature

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

• PubMed: 14525985 
• DOI: 10.1074/jbc.M307826200
• Primary Citation of Related Structures:  
  1OVX


• 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.

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Organizational Affiliation: 

Department of Biology, York University, Toronto, Ontario M3J 1P3, Canada. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-dependent Clp protease ATP-binding subunit clpX	A, B	67	Escherichia coli K-12	Mutation(s): 0  Gene Names: clpX, lopC, b0438, JW0428
Find proteins for P0A6H1 (Escherichia coli (strain K12)) Explore P0A6H1  Go to UniProtKB:  P0A6H1

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	C [auth A], D [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 1 
• Selection Criteria: structures with acceptable covalent geometry 
• OLDERADO: 1OVX Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-03-27 
• Released Date: 2003-12-30 
Deposition Author(s): Donaldson, L.W., Kwan, J., Wojtyra, U., Houry, W.A.

Revision History  

• 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