In Vivo Assembly of Artificial Metalloenzymes and Application in Whole-Cell Biocatalysis**. Chordia, S., Narasimhan, S., Paioni, A. L., Baldus, M., & Roelfes, G. Angewandte Chemie - International Edition, 60(11):5913–5920, 2021. doi abstract bibtex We report the supramolecular assembly of artificial metalloenzymes (ArMs), based on the Lactococcal multidrug resistance regulator (LmrR) and an exogeneous copper(II)–phenanthroline complex, in the cytoplasm of E. coli cells. A combination of catalysis, cell-fractionation, and inhibitor experiments, supplemented with in-cell solid-state NMR spectroscopy, confirmed the in-cell assembly. The ArM-containing whole cells were active in the catalysis of the enantioselective Friedel–Crafts alkylation of indoles and the Diels–Alder reaction of azachalcone with cyclopentadiene. Directed evolution resulted in two different improved mutants for both reactions, LmrR_A92E_M8D and LmrR_A92E_V15A, respectively. The whole-cell ArM system required no engineering of the microbial host, the protein scaffold, or the cofactor to achieve ArM assembly and catalysis. We consider this a key step towards integrating abiological catalysis with biosynthesis to generate a hybrid metabolism.
@article{chordia_vivo_2021,
title = {In {Vivo} {Assembly} of {Artificial} {Metalloenzymes} and {Application} in {Whole}-{Cell} {Biocatalysis}**},
volume = {60},
issn = {15213773},
doi = {10.1002/anie.202014771},
abstract = {We report the supramolecular assembly of artificial metalloenzymes (ArMs), based on the Lactococcal multidrug resistance regulator (LmrR) and an exogeneous copper(II)–phenanthroline complex, in the cytoplasm of E. coli cells. A combination of catalysis, cell-fractionation, and inhibitor experiments, supplemented with in-cell solid-state NMR spectroscopy, confirmed the in-cell assembly. The ArM-containing whole cells were active in the catalysis of the enantioselective Friedel–Crafts alkylation of indoles and the Diels–Alder reaction of azachalcone with cyclopentadiene. Directed evolution resulted in two different improved mutants for both reactions, LmrR\_A92E\_M8D and LmrR\_A92E\_V15A, respectively. The whole-cell ArM system required no engineering of the microbial host, the protein scaffold, or the cofactor to achieve ArM assembly and catalysis. We consider this a key step towards integrating abiological catalysis with biosynthesis to generate a hybrid metabolism.},
number = {11},
journal = {Angewandte Chemie - International Edition},
author = {Chordia, Shreyans and Narasimhan, Siddarth and Paioni, Alessandra Lucini and Baldus, Marc and Roelfes, Gerard},
year = {2021},
pmid = {33428816},
keywords = {artificial metalloenzymes, biocatalysis, copper, in cell NMR spectroscopy, in vivo catalysis},
pages = {5913--5920},
}
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