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- W3113000652 abstract "Abstract Phosphoketolase (PKET) pathway is predominant in cyanobacteria (around 98%) but current opinion is that it is virtually inactive under autotrophic ambient CO 2 condition (AC-auto). This creates an evolutionary paradox due to the existence of PKET pathway in obligatory photoautotrophs. We aim to answer the paradox with the aid of bioinformatic analysis along with metabolic, transcriptomic, fluxomic and mutant data integrated into a multi-level kinetic model. We discussed the problems linked to neglected isozyme, pket 2 ( sll0529 ) and inconsistencies towards the explanation of residual flux via PKET pathway in the case of silenced pket1 ( slr0453 ) in Synechocystis sp. PCC 6803. Our in silico analysis showed: (1) 17% flux reduction via RuBisCO for Δ pket1 under AC-auto, (2) 11.2–14.3% growth decrease for Δ pket2 in turbulent AC-auto, and (3) flux via PKET pathway reaching up to 252% of the flux via phosphoglycerate mutase under AC-auto. All results imply that PKET pathway plays a crucial role under AC-auto by mitigating the decarboxylation occurring in OPP pathway and conversion of pyruvate to acetyl CoA linked to EMP glycolysis under the carbon scarce environment. Finally, our model predicted that PKETs have low affinity to S7P as a substrate." @default.
- W3113000652 created "2020-12-21" @default.
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- W3113000652 date "2020-12-16" @default.
- W3113000652 modified "2023-10-14" @default.
- W3113000652 title "A new insight into role of phosphoketolase pathway in Synechocystis sp. PCC 6803" @default.
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- W3113000652 doi "https://doi.org/10.1038/s41598-020-78475-z" @default.
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