Identification, characterization, and immobilization of a novel YbfF esterase from Halomonas elongata.

Wanki Yoo, Booyoung Kim, Sangeun Jeon, Kyeong Kyu Kim, T Doohun Kim

International journal of biological macromolecules 2020 Dec 15

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The YbfF esterase family, which has a bifurcated binding pocket for diverse ligands, could serve as excellent biocatalysts in industrial and biotechnological applications. Here, the identification, characterization, and immobilization of a novel YbfF esterase (YbfFHalomonas elongata) from Halomonas elongata DSM 2581 is reported. Biochemical characterization of YbfF was carried out using activity staining, chromatographic analysis, kinetic analysis, activity assay, acetic acid release, and pH-indicator-based hydrolysis. YbfFH.elongata displayed broad substrate specificity, including that for p-nitrophenyl esters, glucose pentaacetate, tert-butyl acetate, and β-lactam-containing compounds, with high efficiency. Based on a homology model of YbfFH.elongata, Trp237 in the substrate-binding pocket, a critical residue for catalytic activity and substrate specificity was identified and characterized. Furthermore, crosslinked enzyme aggregates and nanoflower formation were explored to enhance the chemical stability and recyclability of YbfFH.elongata. The present study is the first report of a YbfF esterase from extremophiles, and explains its protein stability, catalytic activity, substrate specificities and diversities, kinetics, functional residues, amyloid formation, and immobilization. Copyright © 2020 Elsevier B.V. All rights reserved.

Citation

Wanki Yoo, Booyoung Kim, Sangeun Jeon, Kyeong Kyu Kim, T Doohun Kim. Identification, characterization, and immobilization of a novel YbfF esterase from Halomonas elongata. International journal of biological macromolecules. 2020 Dec 15;165(Pt A):1139-1148