Drienovská I, Scheele RA, Gutiérrez de Souza C, Roelfes G. A Hydroxyquinoline-Based Unnatural Amino Acid for the Design of Novel Artificial Metalloenzymes.
Chembiochem 2020;
21:3077-3081. [PMID:
32585070 PMCID:
PMC7689906 DOI:
10.1002/cbic.202000306]
[Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/25/2020] [Indexed: 11/11/2022]
Abstract
We have examined the potential of the noncanonical amino acid (8-hydroxyquinolin-3-yl)alanine (HQAla) for the design of artificial metalloenzymes. HQAla, a versatile chelator of late transition metals, was introduced into the lactococcal multidrug-resistance regulator (LmrR) by stop codon suppression methodology. LmrR_HQAla was shown to complex efficiently with three different metal ions, CuII , ZnII and RhIII to form unique artificial metalloenzymes. The catalytic potential of the CuII -bound LmrR_HQAla enzyme was shown through its ability to catalyse asymmetric Friedel-Craft alkylation and water addition, whereas the ZnII -coupled enzyme was shown to mimic natural Zn hydrolase activity.
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