Paenibacillus barengoltzii: isolation, growth, and characterization of a high dextrinizer α-amylase

Ticona A.R.P.; da Silva Neto M.; de Marco J.L.; Cabrera R.C.; Hamann P.R.V.; Polikarpov I.; Noronha E.F. · Biotechnology Letters (2025) · DOI: 10.1007/s10529-025-03624-1

Resumen

Currently, the shift to a greener economy requires the prospection of new industrial processes to reduce greenhouse-gas emissions. Enzymatic catalysis is considered a green alternative to traditional industrial processes. Among enzymes of industrial relevance, starch-degrading enzymes, such as α-amylases, have received attention because of their enormous potential to hydrolyze starch-based materials, generating smaller sugars that can be used for the biosynthesis of chemicals of industrial relevance, such as ethanol. In the present study, a new isolate of Paenibacillus barengoltzii was obtained from cow rumen and its potential to produce amylases was evaluated. Additionally, a recombinant amylase, AmyPb, was produced and biochemically characterized. AmyPb displays high activity at elevated temperatures (55 °C) and can withstand elevated temperatures. The experimentally calculated melting temperature showed that AmyPb is more stable in alkaline environments, with a Tm of 59 °C at pH 9. AmyPb hydrolyzed potato and cassava starches with hydrolysis efficiencies of 28 and 55%, respectively. The results of this study are relevant for the development of industrial processes that employ thermostable amylases. © The Author(s), under exclusive licence to Springer Nature B.V. 2025.

Instituciones: Universidad Nacional Jorge Basadre Grohmann