| A two component system is involved in acid adaptation of Lactobacillus delbrueckii subsp. bulgaricus. | |
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MedLine Citation:
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PMID: 22177749 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The Gram-positive bacterium Lactobacillus delbrueckii subsp. bulgaricus is of vital importance to the food industry, especially to the dairy industry. Two component systems (TCSs) are one of the most important mechanisms for environmental sensing and signal transduction in the majority of Gram-positive and Gram-negative bacteria. A typical TCS consists of a histidine protein kinase (HPK) and a cytoplasmic response regulator (RR). To investigate the functions of TCSs during acid adaptation in L. bulgaricus, we used quantitative PCR to reveal how TCSs expression changes during acid adaptation. Two TCSs (JN675228/JN675229 and JN675230/JN675231) and two HPKs (JN675236 and JN675240) were induced during acid adaptation. These TCSs were speculated to be related with the acid adaptation ability of L. bulgaricus. The mutants of JN675228/JN675229 were constructed in order to investigate the functions of JN675228/JN675229. The mutants showed reduced acid adaptation compared to that of wild type, and the complemented strains were similar to the wild-type strain. These observations suggested that JN675228 and JN675229 were involved in acid adaptation in L. bulgaricus. The interaction between JN675228 and JN675229 was identified by means of yeast two-hybrid system. The results indicated there is interaction between JN675228 and JN675229. |
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Authors:
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Yanhua Cui; Wei Liu; Xiaojun Qu; Zhangting Chen; Xu Zhang; Tong Liu; Lanwei Zhang |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-14 |
Journal Detail:
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Title: Microbiological research Volume: - ISSN: 1618-0623 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-19 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9437794 Medline TA: Microbiol Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Crown Copyright © 2011. Published by Elsevier GmbH. All rights reserved. |
Affiliation:
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School of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, PR China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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