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Structure and Function of Bacterial Kid-Kis and Related Toxin-Antitoxin Systems

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Abstract:

Toxin-antitoxin systems were discovered as plasmid auxiliary maintenance cassettes. In recent years, an increasing amount of structural and functional information has become available about the proteins involved, allowing the understanding of bacterial cell growth inhibition by the toxins on a molecular level. A well-studied TA system is formed by the proteins Kid and Kis, encoded by the parD operon of the Escherichia coli plasmid R1. The toxicity of Kid has been related to its endoribonuclease activity, which is counteracted by binding of the antitoxin Kis at the proposed active site. In this review, the structural studies on the Kid-Kis system are compared to those of three related toxin-antitoxin systems: MazF-MazE, CcdB-CcdA and RelE-RelB.





Keywords: CcdB-CcdA; MazF-MazE; RelE-RelB; plasmid maintenance; ribonuclease

Document Type: Research Article

DOI: http://dx.doi.org/10.2174/092986607779816096

Affiliations: Department of NMR Spectroscopy,Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.

Publication date: February 1, 2007

More about this publication?
  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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