Bottom-Up Construction of a Minimal System for Cellular Respiration and Energy Regeneration.

Bottom-Up Construction of a Minimal System for Cellular Respiration and Energy Regeneration.
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DOI:
10.1021/acssynbio.0c00110
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发表时间:
2020-06-19
影响因子:
4.7
通讯作者:
Hirst J
Hirst J
中科院分区:
生物学2区
文献类型:
--
作者:
Biner O;Fedor JG;Yin Z;Hirst J

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Adenosine triphosphate (ATP), the cellular energy currency, is essential for life. The ability to provide a constant supply of ATP is therefore crucial for the construction of artificial cells in synthetic biology. Here, we describe the bottom-up assembly and characterization of a minimal respiratory system that uses NADH as a fuel to produce ATP from ADP and inorganic phosphate, and is thus capable of sustaining both upstream metabolic processes that rely on NAD+, and downstream energydemanding processes that are powered by ATP hydrolysis. A detergent-mediated approach was used to co-reconstitute respiratory mitochondrial complex I and an F-type ATP synthase into nanosized liposomes. Addition of the alternative oxidase to the resulting proteoliposomes produced a minimal artificial “organelle” that reproduces the energy-converting catalytic reactions of the mitochondrial respiratory chain: NADH oxidation, ubiquinone cycling, oxygen reduction, proton pumping, and ATP synthesis. As a proof-of-principle, we demonstrate that our nanovesicles are capable of using an NAD+-linked substrate to drive cell-free protein expression. Our nanovesicles are both efficient and durable and may be applied to sustain artificial cells in future work.
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