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  Engineering light‐responsive contractile actomyosin networks with DNA nanotechnology

Jahnke, K., Weiss, M., Weber, C., Platzman, I., Göpfrich, K., & Spatz, J. P. (2020). Engineering light‐responsive contractile actomyosin networks with DNA nanotechnology. Advanced Biosystems, 4(9): 2000102, pp. 1-9. doi:10.1002/adbi.202000102.

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 Creators:
Jahnke, Kevin1, Author              
Weiss, Marian1, Author              
Weber, Cornelia1, Author              
Platzman, Ilia1, 2, Author              
Göpfrich, Kerstin1, Author              
Spatz, Joachim P.1, 2, Author              
Affiliations:
1Cellular Biophysics, Max Planck Institute for Medical Research, Max Planck Society, ou_2364731              
2Biophysical Chemistry, Institute of Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany, ou_persistent22              

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Free keywords: DNA nanotechnology; actomyosin networks; bottom-up synthetic biology; symmetry break; water-in-oil droplets
 Abstract: External control and precise manipulation is key for the bottom‐up engineering of complex synthetic cells. Minimal actomyosin networks have been reconstituted into synthetic cells; however, their light‐triggered symmetry breaking contraction has not yet been demonstrated. Here, light‐activated directional contractility of a minimal synthetic actomyosin network inside microfluidic cell‐sized compartments is engineered. Actin filaments, heavy‐meromyosin‐coated beads, and caged ATP are co‐encapsulated into water‐in‐oil droplets. ATP is released upon illumination, leading to a myosin‐generated force which results in a motion of the beads along the filaments and hence a contraction of the network. Symmetry breaking is achieved using DNA nanotechnology to establish a link between the network and the compartment periphery. It is demonstrated that the DNA‐linked actin filaments contract to one side of the compartment forming actin asters and quantify the dynamics of this process. This work exemplifies that an engineering approach to bottom‐up synthetic biology, combining biological and artificial elements, can circumvent challenges related to active multi‐component systems and thereby greatly enrich the complexity of synthetic cellular systems.

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Language(s): eng - English
 Dates: 2020-06-262020-04-022020-07-21
 Publication Status: Published online
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
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Title: Advanced Biosystems
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 4 (9) Sequence Number: 2000102 Start / End Page: 1 - 9 Identifier: ISSN: 2366-7478
CoNE: https://pure.mpg.de/cone/journals/resource/2366-7478