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- W4309506722 abstract "Abstract An enhanced NADH/NAD + ratio, termed reductive stress, is associated with many diseases. However, whether a downstream sensing pathway exists to mediate pathogenic outcomes remains unclear. Here, we generate a soluble pyridine nucleotide transhydrogenase from Escherichia coli ( Ec STH), which can elevate the NADH/NAD + ratio and meantime reduce the NADPH/NADP + ratio. Additionally, we fuse Ec STH with previously described Lb NOX (a water-forming NADH oxidase from Lactobacillus brevis ) to resume the NADH/NAD + ratio. With these tools and by using genome-wide CRISPR/Cas9 library screens and metabolic profiling in mammalian cells, we find that accumulated NADH deregulates PRPS2 (Ribose-phosphate pyrophosphokinase 2)-mediated downstream purine biosynthesis to provoke massive energy consumption, and therefore, the induction of energy stress. Blocking purine biosynthesis prevents NADH accumulation-associated cell death in vitro and tissue injury in vivo. These results underscore the pathophysiological role of deregulated purine biosynthesis in NADH accumulation-associated disorders and demonstrate the utility of Ec STH in manipulating NADH/NAD + and NADPH/NADP + ." @default.
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- W4309506722 date "2022-11-17" @default.
- W4309506722 modified "2023-10-16" @default.
- W4309506722 title "Identification of purine biosynthesis as an NADH-sensing pathway to mediate energy stress" @default.
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- W4309506722 doi "https://doi.org/10.1038/s41467-022-34850-0" @default.
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