Proteins from penicillin residue were isolated by trichloroacetic acid precipitation method
ZHONG Weizhang1,2,, YANG Ke1,2, HONG Chen3, XU Bin1,2, FENG Weibo1,2, CHEN Sainan1,2, LI Yue1,2, LI Zaixing1,2,, 1.School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China 2.Pollution Prevention Biotechnology Laboratory of Hebei Province, Shijiazhuang 050018, China 3.Beijing Key Laboratory of Resource Oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Abstract:In order to solve the problem of protein recovery from antibiotic residue, different precipitation methods were used to separate protein from penicillin residue. Firstly, the effects of different precipitation methods on protein precipitation were investigated, and the optimal protein precipitation method was selected. Then, the single factor experiment and response surface experiment were carried out to optimize the process parameters of the optimal precipitation method for the separation of proteins from penicillin residue. Finally, proteins were isolated from penicillin residue under optimum conditions. The results showed that the best precipitation effect was obtained by trichloroacetic acid (TCA) precipitation method. The optimal extraction conditions were: mass fraction of TCA was 20%, pH of hydrolysate was 3.0, precipitation time was 10 h and centrifugation rotation was 10 000 r·min?1. Under these conditions, the precipitation rate of protein was 89.5%. Under the optimal conditions, the protein precipitation rate is 89%, and the experimental value is in good agreement with the predicted value, so that the optimal protein precipitation method can be obtained. This study can provide reference for protein recovery from fungus residue. Key words:penicillium residue/ thermophilic bacteria/ protein precipitation separation/ trichloroacetic acid.
图1不同沉淀法对蛋白质沉淀率的影响 Figure1.Effects of different precipitation methods on protein precipitation rate
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1.School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China 2.Pollution Prevention Biotechnology Laboratory of Hebei Province, Shijiazhuang 050018, China 3.Beijing Key Laboratory of Resource Oriented Treatment of Industrial Pollutants, School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China Received Date: 2020-12-15 Accepted Date: 2021-02-01 Available Online: 2021-06-25 Keywords:penicillium residue/ thermophilic bacteria/ protein precipitation separation/ trichloroacetic acid Abstract:In order to solve the problem of protein recovery from antibiotic residue, different precipitation methods were used to separate protein from penicillin residue. Firstly, the effects of different precipitation methods on protein precipitation were investigated, and the optimal protein precipitation method was selected. Then, the single factor experiment and response surface experiment were carried out to optimize the process parameters of the optimal precipitation method for the separation of proteins from penicillin residue. Finally, proteins were isolated from penicillin residue under optimum conditions. The results showed that the best precipitation effect was obtained by trichloroacetic acid (TCA) precipitation method. The optimal extraction conditions were: mass fraction of TCA was 20%, pH of hydrolysate was 3.0, precipitation time was 10 h and centrifugation rotation was 10 000 r·min?1. Under these conditions, the precipitation rate of protein was 89.5%. Under the optimal conditions, the protein precipitation rate is 89%, and the experimental value is in good agreement with the predicted value, so that the optimal protein precipitation method can be obtained. This study can provide reference for protein recovery from fungus residue.