2AN7

Solution structure of the bacterial antidote ParD


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 24 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The solution structure of ParD, the antidote of the ParDE toxin antitoxin module, provides the structural basis for DNA and toxin binding.

Oberer, M.Zangger, K.Gruber, K.Keller, W.

(2007) Protein Sci. 16: 1676-1688

  • DOI: 10.1110/ps.062680707

  • PubMed Abstract: 
  • ParD is the antidote of the plasmid-encoded toxin-antitoxin (TA) system ParD-ParE. These modules rely on differential stabilities of a highly expressed but labile antidote and a stable toxin expressed from one operon. Consequently, loss of the coding ...

    ParD is the antidote of the plasmid-encoded toxin-antitoxin (TA) system ParD-ParE. These modules rely on differential stabilities of a highly expressed but labile antidote and a stable toxin expressed from one operon. Consequently, loss of the coding plasmid results in loss of the protective antidote and poisoning of the cell. The antidote protein usually also exhibits an autoregulatory function of the operon. In this paper, we present the solution structure of ParD. The repressor activity of ParD is mediated by the N-terminal half of the protein, which adopts a ribbon-helix-helix (RHH) fold. The C-terminal half of the protein is unstructured in the absence of its cognate binding partner ParE. Based on homology with other RHH proteins, we present a model of the ParD-DNA interaction, with the antiparallel beta-strand being inserted into the major groove of DNA. The fusion of the N-terminal DNA-binding RHH motif to the toxin-binding unstructured C-terminal domain is discussed in its evolutionary context.


    Related Citations: 
    • The anti-toxin ParD of plasmid RK2 consists of two structurally distinct moieties and belongs to the ribbon-helix-helix family of DNA-binding proteins
      Oberer, M.,Zangger, K.,Prytulla, S.,Keller, W.
      (2002) Biochem.J. 361: 41


    Organizational Affiliation

    Institut für Chemie, Arbeitsgruppe Strukturbiologie, Karl-Franzens-Universität Graz, A-8010 Graz, Austria.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein parD
A, B
83Escherichia coliMutation(s): 0 
Gene Names: parD
Find proteins for P22995 (Escherichia coli)
Go to UniProtKB:  P22995
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 24 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2AN7 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-09-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance