| Literature DB >> 33026156 |
Shunsuke Kato1, Akira Onoda1,2, Naomasa Taniguchi1, Ulrich Schwaneberg3, Takashi Hayashi1.
Abstract
Directed evolution of Cp*RhIII -linked nitrobindin (NB), a biohybrid catalyst, was performed based on an in vitro screening approach. A key aspect of this effort was the establishment of a high-throughput screening (HTS) platform that involves an affinity purification step employing a starch-agarose resin for a maltose binding protein (MBP) tag. The HTS platform enables efficient preparation of the purified MBP-tagged biohybrid catalysts in a 96-well format and eliminates background influence of the host E. coli cells. Three rounds of directed evolution and screening of more than 4000 clones yielded a Cp*RhIII -linked NB(T98H/L100K/K127E) variant with a 4.9-fold enhanced activity for the cycloaddition of acetophenone oximes with alkynes. It is confirmed that this HTS platform for directed evolution provides an efficient strategy for generating highly active biohybrid catalysts incorporating a synthetic metal cofactor.Entities:
Keywords: C−H bond functionalization; artificial metalloenzymes; biohybrid catalysts; directed evolution; rhodium
Year: 2020 PMID: 33026156 PMCID: PMC7894531 DOI: 10.1002/cbic.202000681
Source DB: PubMed Journal: Chembiochem ISSN: 1439-4227 Impact factor: 3.164