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Journal of Bacteriology, February 2008, p. 1152-1156, Vol. 190, No. 3
0021-9193/08/$08.00+0     doi:10.1128/JB.01206-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Modulation of Horizontally Acquired Genes by the Hha-YdgT Proteins in Salmonella enterica Serovar Typhimurium{triangledown} ,{dagger}

Aitziber Vivero,1 Rosa C. Baños,1 Javier F. Mariscotti,2 Juan Carlos Oliveros,3 Francisco García-del Portillo,2 Antonio Juárez,1 and Cristina Madrid1*

Departament de Microbiologia, Universitat de Barcelona, Avda. Diagonal 645, 08028 Barcelona, Spain,1 Departamento de Biotecnología Microbiana, Centro Nacional de Biotecnología (CSIC), Darwin 3, 28049 Madrid, Spain,2 BioinfoGP, Centro Nacional de Biotecnología-CSIC, Madrid, Spain3

Received 27 July 2007/ Accepted 13 November 2007

We describe a transcriptomic study of the effect of hha and ydgT mutations in Salmonella enterica serovar Typhimurium. A large number of genes showing altered expression are located in AT-rich horizontally acquired DNA sequences. Many of these genes have also been reported to be targets for H-NS. As Hha and YdgT interact with H-NS, our findings strongly suggest that Hha and/or YdgT must form complexes with H-NS when they silence these DNA regions.

* Corresponding author. Mailing address: Departament de Microbiologia, Universitat de Barcelona, Avda. Diagonal 645, 08028 Barcelona, Spain. Phone: 34 93 4034625. Fax: 34 93 4034629. E-mail: cmadris{at}ub.edu

{triangledown} Published ahead of print on 26 November 2007.

{dagger} Supplemental material for this article may be found at http://jb.asm.org/.

Journal of Bacteriology, February 2008, p. 1152-1156, Vol. 190, No. 3
0021-9193/08/$08.00+0     doi:10.1128/JB.01206-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



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