期刊
JOURNAL OF MICROBIOLOGICAL METHODS
卷 127, 期 -, 页码 182-187出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mimet.2016.06.008
关键词
qRT-PCR; Carbon starvation; Housekeeping genes normalisation
资金
- Australian Research Council [DP140102192]
- Singapore Centre for Environmental Life Sciences Engineering
- National Research Foundation Singapore
- Ministry of Education
- Nanyang Technological University
- National University of Singapore, under its Research Centre of Excellence Program
Quantitative real-time polymerase chain reaction (qRT-PCR) is a reliable technique for quantifying mRNA levels when normalised by a stable reference gene/s. Many putative reference genes are known to be affected by physiological stresses, such as nutrient limitation and hence may not be suitable for normalisation. In this study of Pseudomonas aeruginosa, the expression of 13 commonly used reference genes, rpoS, proC, recA, rpsL, rho, oprL, anr, tipA, nadB, fabD, ampC, algD and gyrA, were analysed for changes in expression under carbon starvation and nutrient replete conditions. The results showed that rpoS was the only stably expressed housekeeping gene during carbon starvation. In contrast, other commonly used housekeeping genes were shown to vary by as much as 10-100 fold under starvation conditions. This study has identified a suitable reference gene for qRT-PCR in P. aeruginosa during carbon starvation. The results presented here highlight the need to validate housekeeping genes under the chosen experimental conditions. (C) 2016 Elsevier B.V. All rights reserved.
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