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Title: Design and Characterization of DNA Strand-Displacement Circuits in Serum-Supplemented Cell Medium

Journal Article · · ACS Synthetic Biology
ORCiD logo [1]; ORCiD logo [2]
  1. Johns Hopkins Univ., Baltimore, MD (United States). Chemical and Biomolecular Engineering
  2. Johns Hopkins Univ., Baltimore, MD (United States). Chemical and Biomolecular Engineering and Computer Science

The functional stability and lifetimes of synthetic molecular circuits in biological environments are important for long-term, stable sensors or controllers of cell or tissue behavior. DNA-based molecular circuits, particularly DNA strand-displacement circuits, provide simple and effective biocompatible control mechanisms and sensors, but are vulnerable to digestion by nucleases present in living tissues and serum-supplemented cell culture. The stability of double-stranded and single-stranded DNA circuit components in serum-supplemented cell medium and the corresponding effect of nuclease-mediated degradation on circuit performance were characterized to determine the major routes of degradation and DNA strand-displacement circuit failure. Simple circuit design choices, such as the use of 5' toeholds within the DNA complexes used as reactants in the strand-displacement reactions and the termination of single-stranded components with DNA hairpin domains at the 3' termini, significantly increase the functional lifetime of the circuit components in the presence of nucleases. Furthermore, simulations of multireaction circuits, guided by the experimentally measured operation of single-reaction circuits, enable predictive realization of multilayer and competitive-reaction circuit behavior. Altogether, these results provide a basic route to increased DNA circuit stability in cell culture environments.

Research Organization:
Johns Hopkins Univ., Baltimore, MD (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0015906
OSTI ID:
1363867
Journal Information:
ACS Synthetic Biology, Vol. 6, Issue 9; ISSN 2161-5063
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Five Inputs Code Lock Circuit Design Based on DNA Strand Displacement Mechanism journal November 2019
Synthetic Gene Expression Circuits for Designing Precision Tools in Oncology journal August 2017
Computing with biological switches and clocks journal June 2018
Heterochiral nucleic acid circuits journal August 2019
Cell-Free Synthetic Biology Platform for Engineering Synthetic Biological Circuits and Systems journal May 2019
DNA-based communication in populations of synthetic protocells journal March 2019
A supramolecular five-component relay switch that exposes the mechanistic competition of dissociative versus associative binding to cucurbiturils by ratiometric fluorescence monitoring journal January 2019
A Molecular Hero Suit for In Vitro and In Vivo DNA Nanostructures journal February 2019