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- W4220792806 abstract "Abstract BACKGROUND Various neutral and alkaline peptidases are commercially available for use in protein hydrolysis under neutral to alkaline conditions. However, the hydrolysis of proteins under acidic conditions by applying fungal aspartic peptidases (FAPs) has not been investigated in depth so far. The aim of this study, thus, was to purify a FAP from the commercial enzyme preparation, ROHALASE® BXL, determine its biochemical characteristics, and investigate its application for the hydrolysis of food and animal feed proteins under acidic conditions. RESULTS A Trichoderma reesei derived FAP, with an apparent molecular mass of 45.8 kDa (sodium dodecyl sulfate–polyacrylamide gel electrophoresis; SDS‐PAGE) was purified 13.8‐fold with a yield of 37% from ROHALASE® BXL. The FAP was identified as an aspartate protease (UniProt ID: G0R8T0) by inhibition and nano‐LC‐ESI‐MS/MS studies. The FAP showed the highest activity at 50°C and pH 4.0. Monovalent cations, organic solvents, and reducing agents were tolerated well by the FAP. The FAP underwent an apparent competitive product inhibition by soy protein hydrolysate and whey protein hydrolysate with apparent K i ‐ values of 1.75 and 30.2 mg*mL −1 , respectively. The FAP showed promising results in food (soy protein isolate and whey protein isolate) and animal feed protein hydrolyses. For the latter, an increase in the soluble protein content of 109% was noted after 30 min. CONCLUSION Our results demonstrate the applicability of fungal aspartic endopeptidases in the food and animal feed industry. Efficient protein hydrolysis of industrially relevant substrates such as acidic whey or animal feed proteins could be conducted by applying fungal aspartic peptidases. © 2022 Society of Chemical Industry." @default.
- W4220792806 created "2022-04-03" @default.
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- W4220792806 date "2022-04-20" @default.
- W4220792806 modified "2023-09-27" @default.
- W4220792806 title "Purification and characterization of a fungal aspartic peptidase from <scp><i>Trichoderma reesei</i></scp> and its application for food and animal feed protein hydrolyses" @default.
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- W4220792806 doi "https://doi.org/10.1002/jsfa.11871" @default.
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