Dynamics of hydroxide-ion-driven reversible autocatalytic networks

Emese Lantos, Gergő Mótyán, Éva Frank, Rienk Eelkema, Jan van Esch, Dezső Horváth, Ágota Tóth*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
23 Downloads (Pure)

Abstract

In living systems adaptive regulation requires the presence of nonlinear responses in the underlying chemical networks. Positive feedbacks, for example, can lead to autocatalytic bursts that provide switches between two stable states or to oscillatory dynamics. The stereostructure stabilized by hydrogen bonds provides an enzyme its selectivity, rendering pH regulation essential for its functioning. For effective control, triggers by small concentration changes play roles where the strength of feedback is important. Here we show that the interaction of acid-base equilibria with simple reactions with pH-dependent rate can lead to the emergence of a positive feedback in hydroxide ion concentration during the hydrolysis of some Schiff bases in the physiological pH range. The underlying reaction network can also support bistability in an open system.

Original languageEnglish
Pages (from-to)20243-20247
Number of pages5
JournalRSC Advances
Volume13
Issue number29
DOIs
Publication statusPublished - 2023

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