ArticleJournal of bacteriology2010
Physiological and transcriptional response of Lactobacillus casei ATCC 334 to acid stress.
Article in Journal of bacteriology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 94 papers.
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Who cites it
94 citing papers in PubMed, 206 citations in OpenAlex.
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- Characterization of Mild Acid Stress Response in an Engineered Acid-TolerantMicroorganisms · 2024Article
- Acid tolerance responses and their mechanisms inFood science and biotechnology · 2024Article
- Transcriptomic analysis reveals differential gene expression patterns of Lacticaseibacillus casei ATCC 393 in response to ultrasound stress.Ultrasonics sonochemistry · 2024Article
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- Role of Clay Substrate Molecular Interactions in Some Dairy Technology Applications.International journal of molecular sciences · 2024Review
- Expression of stress responsive genes enablesFrontiers in microbiology · 2024Article
- Ancestors in the Extreme: A Genomics View of Microbial Diversity in Hypersaline Aquatic Environments.Results and problems in cell differentiation · 2024Article
- Manipulating the growth environment through co-culture to enhance stress tolerance and viability of probiotic strains in the gastrointestinal tract.Applied and environmental microbiology · 2023Article
34 more citing papers are in PubMed but not listed here.
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Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
This study investigated features of the acid tolerance response (ATR) in Lactobacillus casei ATCC 334. To optimize ATR induction, cells were acid adapted for 10 or 20 min at different pH values (range, 3.0 to 5.0) and then acid challenged at pH 2.0. Adaptation over a broad range of pHs improved acid tolerance, but the highest survival was noted in cells acid adapted for 10 or 20 min at pH 4.5. Analysis of cytoplasmic membrane fatty acids (CMFAs) in acid-adapted cells showed that they had significantly (P < 0.05) higher total percentages of saturated and cyclopropane fatty acids than did control cells. Specifically, large increases in the percentages of C(14:0), C(16:1n(9)), C(16:0), and C(19:0(11c)) were noted in the CMFAs of acid-adapted and acid-adapted, acid-challenged cells, while C(18:1n(9)) and C(18:1n(11)) showed the greatest decrease. Comparison of the transcriptome from control cells (grown at pH 6.0) against that from cells acid adapted for 20 min at pH 4.5 indicated that acid adaption invoked a stringent-type response that was accompanied by other functions which likely helped these cells resist acid damage, including malolactic fermentation and intracellular accumulation of His. Validation of microarray data was provided by experiments that showed that L. casei survival at pH 2.5 was improved at least 100-fold by chemical induction of the stringent response or by the addition of 30 mM malate or 30 mM histidine to the acid challenge medium. To our knowledge, this is the first report that intracellular histidine accumulation may be involved in bacterial acid resistance.
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