Expanding the Dynamic Range of a Transcription Factor-Based Biosensor in Saccharomyces cerevisiae
Artikel i vetenskaplig tidskrift, 2019

Metabolite biosensors are useful tools for high-throughput screening approaches and pathway regulation approaches. An important feature of biosensors is the dynamic range. To expand the maximum dynamic range of a transcription factor-based biosensor in Saccharomyces cerevisiae, using the fapO/FapR system from Bacillus subtilis as an example case, five native promoters, including constitutive and glucose-regulated ones, were modified. By evaluating different binding site (BS) positions in the core promoters, we identified locations that resulted in a high maximum dynamic range with low expression under repressed conditions. We further identified BS positions in the upstream element region of the TEF1 promoter that did not influence the native promoter strength but resulted in repression in the presence of a chimeric repressor consisting of FapR and the yeast repressor Mig1. These modified promoters with broad dynamic ranges will provide useful information for the engineering of future biosensors and their use in complex genetic circuits.

Saccharomyces cerevisiae


promoter engineering


maximum dynamic range



Yasaman Dabirian

Chalmers, Biologi och bioteknik, Systembiologi

Novo Nordisk Fonden

Xiaowei Li

Chalmers, Biologi och bioteknik, Systembiologi

Yun Chen

Chalmers, Biologi och bioteknik, Systembiologi

Florian David

Chalmers, Biologi och bioteknik, Systembiologi

Jens B Nielsen

Beijing University of Chemical Technology

Danmarks Tekniske Universitet (DTU)

Chalmers, Biologi och bioteknik, Systembiologi

Verena Siewers

Chalmers, Biologi och bioteknik, Systembiologi

ACS Synthetic Biology

2161-5063 (eISSN)

Vol. 8 9 1968-1975


Medicinsk genetik

Bioinformatik och systembiologi






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