Characterization and modeling of transcriptional cross-regulation in Acinetobacter baylyi ADP1

Zhang, Dayi; Zhao, Yun; He, Yi; Wang, Yun; Zhao, Yiyu; Zheng, Yi; Wei, Xia; Zhang, Litong; Li, Yuzhen; Jin, Tao; Wu, Lin; Wang, Hui; Davison, Paul A.; Xu, Junguang; Huang, Wei E.. 2012 Characterization and modeling of transcriptional cross-regulation in Acinetobacter baylyi ADP1. ACS Synthetic Biology, 1 (7). 274-283.

Full text not available from this repository.


Synthetic biology involves reprogramming and engineering of regulatory genes in innovative ways for the implementation of novel tasks. Transcriptional gene regulation systems induced by small molecules in prokaryotes provide a rich source for logic gates. Cross-regulation, whereby a promoter is activated by different molecules or different promoters are activated by one molecule, can be used to design an OR-gate and achieve cross-talk between gene networks in cells. Acinetobacter baylyi ADP1 is naturally transformable, readily editing its chromosomal DNA, which makes it a convenient chassis for synthetic biology. The catabolic genes for salicylate, benzoate, and catechol metabolism are located within a supraoperonic cluster (-sal-are-ben-cat-) in the chromosome of A. baylyi ADP1, which are separately regulated by LysR-type transcriptional regulators (LTTRs). ADP1-based biosensors were constructed in which salA, benA, and catB were fused with a reporter gene cassette luxCDABE under the separate control of SalR, BenM, and CatM regulators. Salicylate, benzoate, catechol, and associated metabolites were found to mediate cross-regulation among sal, ben, and cat operons. A new mathematical model was developed by considering regulator-inducer binding and promoter activation as two separate steps. This model fits the experimental data well and is shown to predict cross-regulation performance.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Topics & Objectives 2009 - 2012 > Biodiversity
CEH Sections/Science Areas: Hails
ISSN: 2161-5063
Additional Keywords: cross-regulation, Acinetobacter baylyi ADP1, catechol, salicylate, benzoate, LysR-type gene regulation, mathematic model, repressor
NORA Subject Terms: Biology and Microbiology
Date made live: 17 Jan 2013 09:52 +0 (UTC)

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...