Applied Microbiology and Biotechnology

, Volume 96, Issue 4, pp 1039–1047 | Cite as

Validation of the use of multiple internal control genes, and the application of real-time quantitative PCR, to study esterase gene expression in Oenococcus oeni

  • Krista M. Sumby
  • Paul R. Grbin
  • Vladimir Jiranek
Methods and protocols

Abstract

The study of gene expression and accurate quantitation of target genes in any organism depends on correct normalisation. Due to the increase in studies on Oenococcus oeni gene expression, there is a clear need for alternative reference genes in order to reliably measure expression levels. In this manuscript, we propose the approach of using multiple reference genes to provide a more robust basis for establishing a reference gene set. The identification and evaluation of a panel of nine reference genes, including the commonly used ldhD, for real-time PCR normalisation was performed in O. oeni. Expression levels of these reference genes were then measured by real-time qPCR in an independent set of O. oeni samples (n = 30). The nine genes were ranked according to their stability of gene expression measure (M) using geNorm to identify the most consistently expressed reference genes. This approach resulted in the identification of multiple reference genes that may be used for a screening and more robust normalisation of target gene expression measured by real-time RT-qPCR. Expression of esterase genes was then measured in these O. oeni samples in the presence of known esterase substrates. The results give an indication of how these genes may be involved in ester synthesis and hydrolysis in O. oeni.

Keywords

qPCR Reference genes Oenococcus oeni Esterase 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Krista M. Sumby
    • 1
  • Paul R. Grbin
    • 1
  • Vladimir Jiranek
    • 1
  1. 1.School of Agriculture, Food and WineThe University of AdelaideAdelaideAustralia

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