Volume 61, Issue 2 e202111857
Communication

Emergence of a Promiscuous Peroxidase Under Non-Equilibrium Conditions**

Sumit Pal

Sumit Pal

Department of Chemical Sciences &, Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal, 741246 India

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Antara Reja

Antara Reja

Department of Chemical Sciences &, Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal, 741246 India

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Subhajit Bal

Subhajit Bal

Department of Chemical Sciences &, Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal, 741246 India

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Baishakhi Tikader

Baishakhi Tikader

Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076 India

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Dibyendu Das

Corresponding Author

Dibyendu Das

Department of Chemical Sciences &, Centre for Advanced Functional Materials, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur, West Bengal, 741246 India

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First published: 12 November 2021
Citations: 18

Dedicated to Dr. Souvik Maiti on the occasion of his 50th Birthday

**

A previous version of this manuscript has been deposited on a preprint server ( Chemrxiv(10.26434/chemrxiv.13558151.v1)).

Graphical Abstract

Substrate-induced generation of a transient catalytic microphase was shown in presence of a single amino acid functionalized fatty acid and a cofactor hemin. The transient state exhibited acceleration of catalytic potential resulting in degradation of the substrate. Furthermore, latent catalytic function was displayed to hydrolyze a precursor to yield the same substrate suggesting promiscuous activity.

Abstract

Herein, we report the substrate induced generation of a transient catalytic microenvironment from a single amino acid functionalized fatty acid in presence of a cofactor hemin. The catalytic state accessed under non-equilibrium conditions showed acceleration of peroxidase activity resulting in degradation of the substrate and subsequently led to disassembly. Equilibrated systems could not access the three-dimensional microphases and showed substantially lower catalytic activity. Further, the assembled state showed latent catalytic function (promiscuity) to hydrolyze a precursor to yield the same substrate. Consequently, the assembly demonstrated protometabolism by exploiting the peroxidase-hydrolase cascade to augment the lifetime and the mechanical properties of the catalytic state.

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