漆酶
化学
生物转化
产量(工程)
甲醇
超滤(肾)
重组DNA
基质(水族馆)
乙腈
色谱法
乙醇
酶
生物化学
有机化学
生物
基因
生态学
冶金
材料科学
作者
Jihene Maati,Jolanta Polak,Monika Janczarek,Marcin Grąz,Issam Smaali,Anna Jarosz‐Wilkołazka
标识
DOI:10.1007/s10529-024-03532-w
摘要
Abstract Objectives This study aimed to produce an engineered recombinant laccase from extremophilic Halalkalibacterium halodurans C-125 (Lac- HhC-125) with higher protein yield, into a more active conformation and with properties that meet the fundamental needs of biotechnological application. Results The rLac- HhC125 was partially purified by size exclusion chromatography and concentrated by ultrafiltration (10 kDa) with a yield of 57.6%. Oxidation reactions showed that adding 2 mM CuSO 4 to the assay solution led to activating the laccase. To increase its initial activity, the rLac- HhC125 was treated at 50 °C for 20 min before the assays, improving its performance by fourfold using the syringaldazine as a substrate. When treated with EDTA, methanol, ethanol, and DMSO, the rLac- HhC125 maintained more than 80% of its original activity. Interestingly, the acetonitrile induced a twofold activity of the rLac- HhC125 . The putative rLac- HhC125 demonstrated a capability of efficient transformation of different organic compounds at pH 6, known as dye precursors, into coloured molecules. Conclusion The rLac- HhC125 was active at high temperatures and alkaline pH, exhibited tolerance to organic solvents, and efficiently transformed different hydroxy derivatives into coloured compounds, which indicates that it can be used in various biotechnological processes.
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