Reproducibility of fluorescent expression from engineered biological constructs in E. coli

We present results of the first large-scale interlaboratory study carried out in synthetic biology, as part of the 2014 and 2015 International Genetically Engineered Machine (iGEM) competitions. Participants at 88 institutions around the world measured fluorescence from three engineered constitutive constructs in E. coli. Few participants were able to measure absolute fluorescence, so data was analyzed in terms of ratios. Precision was strongly related to fluorescent strength, ranging from 1.54-fold standard deviation for the ratio between strong promoters to 5.75-fold for the ratio between the strongest and weakest promoter, and while host strain did not affect expression ratios, choice of instrument did. This result shows that high quantitative precision and reproducibility of results is possible, while at the same time indicating areas needing improved laboratory practices.

DOI

10.1371/journal.pone.0150182

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Thavarajah, W, Abtahi, K, Hand, R, Loke, C M, Wahab, A, Zhu, I, Del Bianco, C, Chizzolini, F, Godino, E, Lentini, R, Mansy, S S, Martin, N Y, Pegorar, C O, Cook, A, Kerns, T, Nielsen, C, Paskett, M, Torgesen, A, Lee, S, Ospovat, O, Raza, S, Shaykevich, D, Shilts, J, Bajorinaite, B, Bendorius, M, Rauluseviciute, I, Savickyte, I, Tumas, S, Buchser, W, Cryan, E, Golino, C, Halleran, A, Jacobs, T, LeFew, M, Maniaci, J, Marken, J, Saha, M, Vij, P, DeSanty, K, Mazza, J, Jiang, Y, Liu, Y & Yang, Y 2016, ' Reproducibility of fluorescent expression from engineered biological constructs in E. coli ', PloS one, vol. 11, no. 3, e0150182, pp. 1-22 . https://doi.org/10.1371/journal.pone.0150182

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[article-cris] Kemian tekniikan korkeakoulu / CHEM

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Reproducibility of fluorescent expression from engineered biological constructs in E. coli

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