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Volume 2 (2008), Issue 3, Pages 145-149
Research Article

Conditions for gene disruption by homologous recombination of exogenous DNA into the Sulfolobus solfataricus genome

Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute and the Zernike Institute for Advanced Materials, University of Groningen, Kerklaan 30, 9751 NN HAREN, The Netherlands

Received 13 March 2007; Accepted 27 March 2007

Copyright © 2007 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The construction of directed gene deletion mutants is an essential tool in molecular biology that allows functional studies on the role of genes in their natural environment. For hyperthermophilic archaea, it has been difficult to obtain a reliable system to construct such mutants. However, during the past years, systems have been developed for Thermococcus kodakarensis and two Sulfolobus species, S. acidocaldarius and derivatives of S. solfataricus 98/2. Here we describe an optimization of the method for integration of exogenous DNA into S. solfataricus PBL 2025, an S. solfataricus 98/2 derivative, based on lactose auxotrophy that now allows for routine gene inactivation.