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Journal of Biomedicine and Biotechnology
Volume 2011, Article ID 934756, 6 pages
http://dx.doi.org/10.1155/2011/934756
Research Article

The Fur Transcription Regulator and Fur-Regulated Genes in Clostridium botulinum A ATCC 3502

School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, Zhejiang 310035, China

Received 19 August 2011; Revised 30 September 2011; Accepted 10 October 2011

Academic Editor: Ayman El-Kadi

Copyright © 2011 Weibin Zhang et al. 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.

Abstract

Clostridium botulinum is a spore-forming bacterium that can produce a very powerful neurotoxin that causes botulism. In this study, we have investigated the Fur transcription regulators in Clostridium botulinum and Fur-regulated genes in Clostridium botulinum A ATCC 3502. We found that gene loss may be the main cause leading to the different numbers of Fur transcription regulators in different Clostridium botulinum strains. Meanwhile, 46 operons were found to be regulated by the Fur transcription regulator in Clostridium botulinum A ATCC 3502, involved in several functional classifications, including iron acquisition, iron utilization, iron transport, and transcription regulator. Under an iron-restricted medium, we experimentally found that a Fur transcription regulator (CBO1372) and two operons (DedA, CBO2610–CBO2614 and ABC transporter, CBO0845–CBO0847) are shown to be differentially expressed in Clostridium botulinum A ATCC 3502. This study has provided-us novel insights into the diversity of Fur transcription regulators in different Clostridium botulinum strains and diversity of Fur-targeted genes, as well as a better understanding of the dynamic changes in iron restriction occurring in response to this stress.