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  Minimal pathway for the regeneration of redox cofactors

Partipilo, M., Ewins, E. J., Frallicciardi, J., Robinson, T., Poolman, B., & Slotboom, D. J. (2021). Minimal pathway for the regeneration of redox cofactors. JACS Au, 1(12), 2280-2293. doi:10.1021/jacsau.1c00406.

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 Creators:
Partipilo, Michele, Author
Ewins, Eleanor J., Author
Frallicciardi, Jacopo, Author
Robinson, Tom1, Author              
Poolman, Bert, Author
Slotboom, Dirk Jan, Author
Affiliations:
1Tom Robinson, Theorie & Bio-Systeme, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2288691              

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Free keywords: Redox cofactors, metabolic pathways, synthetic biology, liposome confinement, formic acid
 Abstract: Effective metabolic pathways are essential for the construction of in vitro systems mimicking the biochemical complexity of living cells. Such pathways require the inclusion of a metabolic branch that ensures the availability of reducing equivalents. Here, we built a minimal enzymatic pathway confinable in the lumen of liposomes, in which the redox status of the nicotinamide cofactors NADH and NADPH is controlled by an externally provided formate. Formic acid permeates the membrane where a luminal formate dehydrogenase uses NAD+ to form NADH and carbon dioxide. Carbon dioxide diffuses out of the liposomes, leaving only the reducing equivalents in the lumen. A soluble transhydrogenase subsequently utilizes NADH for reduction of NADP+ thereby making NAD+ available again for the first reaction. The pathway is functional in liposomes ranging from a few hundred nanometers in diameter (large unilamellar vesicles) up to several tens of micrometers (giant unilamellar vesicles) and remains active over a period of 7 days. We demonstrate that the downstream biochemical process of reduction of glutathione disulfide can be driven by the transfer of reducing equivalents from formate via NAD(P)H, thereby providing a versatile set of electron donors for reductive metabolism.

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Language(s): eng - English
 Dates: 2021-11-122021
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1021/jacsau.1c00406
BibTex Citekey: doi:10.1021/jacsau.1c00406
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Title: JACS Au
  Abbreviation : JACS Au
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 1 (12) Sequence Number: - Start / End Page: 2280 - 2293 Identifier: ISSN: 2691-3704