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Laccase mediator system obtained from a marine spore exhibits decolorization potential in harsh environmental conditions.
Ecotoxicology and Environmental Safety ( IF 6.8 ) Pub Date : 2020-01-11 , DOI: 10.1016/j.ecoenv.2020.110184
Elaheh Asadi 1 , Ali Makhdoumi 1 , Ahmad Asoodeh 2
Affiliation  

Laccases play a significant role in remedying dye pollutants. Most of these enzymes are originated from terrestrial fungi and bacteria, thus they are not proper to be used in the environments with neutral/alkaline pH, or they may require laborious extraction/purification steps. These limitations can be solved using marine spore laccases through high stability and easy to use application. In the current study, laccase activity of the marine spore -forming Bacillus sp. KC2 was measured according to the guaiacol and syringaldazine oxidation. Abiotic stresses like pH of 6, temperature of 37 °C and 0.3 mM CuSO4 (in comparison with optimal sporulation conditions: pH of 8, temperature of 20 °C and 0.0 mM CuSO4) enhanced laccase formation in sporal coat. Maximum activity of enzyme was observed at 50 °C and pH 7, which did not change in the alkaline pH and temperature range of 20-70 °C. Results indicated ions, inhibitors and solvent stability of the enzyme and its activity were stimulated by Co2+, Mn2+, PMSF, acetone, acetonitrile, ethanol, and methanol. The spore laccase could decolorize synthetic dyes from various chemical groups including azo (acid orange, amaranth, trypan blue, congo red, and amido black), indigo (indigo carmine), thiazine (methylene blue, and toluidine blue), and triarylmethane (malachite green) with ABTS/syringaldazine mediators after 5 h. Degradation products were not toxic against Sorghum vulgare and Artemia salina model organisms. The enzyme mediator system showed high potentials for dye bioremediation over a wide range of harsh conditions.

中文翻译:

从海洋孢子获得的漆酶介体系统在恶劣的环境条件下表现出脱色的潜力。

漆酶在补救染料污染物中起着重要作用。这些酶大多数源自陆生真菌和细菌,因此不适合在具有中性/碱性pH值的环境中使用,或者可能需要费力的提取/纯化步骤。这些局限性可以通过使用海洋孢子漆酶来解决,其稳定性高且易于使用。在当前的研究中,海洋孢子形成芽孢杆菌的漆酶活性。根据愈创木酚和丁香嗪的氧化测量KC2。pH为6,温度为37°C和0.3 mM CuSO4(与最佳孢​​子形成条件相比:pH为8,温度为20°C和0.0 mM CuSO4)之类的非生物胁迫增强了漆膜中漆酶的形成。在50°C和pH 7时观察到最大的酶活性。在碱性pH和20-70°C的温度范围内没有变化。结果表明该酶的离子,抑制剂和溶剂稳定性及其活性被Co2 +,Mn2 +,PMSF,丙酮,乙腈,乙醇和甲醇刺激。孢子漆酶可以使各种化学族的合成染料脱色,包括偶氮(酸橙,a菜红,锥虫蓝,刚果红和酰胺黑),靛蓝(靛红胭脂红),噻嗪(亚甲基蓝和甲苯胺蓝)和三芳基甲烷(孔雀石) 5个小时后,用ABTS /丁香嗪嗪介质介电。降解产物对普通高粱和卤虫卤虫模型生物无毒。酶介体系统在广泛的苛刻条件下显示出很高的染料生物修复潜力。Co2 +,Mn2 +,PMSF,丙酮,乙腈,乙醇和甲醇刺激了酶的抑制剂和酶稳定性及其活性。孢子漆酶可以使各种化学族的合成染料脱色,包括偶氮(酸橙,a菜红,锥虫蓝,刚果红和酰胺黑),靛蓝(靛红胭脂红),噻嗪(亚甲基蓝和甲苯胺蓝)和三芳基甲烷(孔雀石) 5个小时后,用ABTS /丁香嗪嗪介质介电。降解产物对普通高粱和卤虫卤虫模型生物无毒。酶介体系统在广泛的苛刻条件下显示出很高的染料生物修复潜力。Co2 +,Mn2 +,PMSF,丙酮,乙腈,乙醇和甲醇刺激了酶的抑制剂和酶稳定性及其活性。孢子漆酶可以使各种化学族的合成染料脱色,包括偶氮(酸橙,a菜红,锥虫蓝,刚果红和酰胺黑),靛蓝(靛红胭脂红),噻嗪(亚甲基蓝和甲苯胺蓝)和三芳基甲烷(孔雀石) 5小时后,用ABTS /丁香嗪嗪介质介电。降解产物对普通高粱和卤虫卤虫模型生物无毒。酶介体系统在广泛的苛刻条件下显示出很高的染料生物修复潜力。孢子漆酶可以使各种化学族的合成染料脱色,包括偶氮(酸橙,a菜红,锥虫蓝,刚果红和酰胺黑),靛蓝(靛红胭脂红),噻嗪(亚甲基蓝和甲苯胺蓝)和三芳基甲烷(孔雀石) 5个小时后,用ABTS /丁香嗪嗪介质介电。降解产物对普通高粱和卤虫卤虫模型生物无毒。酶介体系统在广泛的苛刻条件下显示出很高的染料生物修复潜力。孢子漆酶可以使各种化学族的合成染料脱色,包括偶氮(酸橙,a菜红,锥虫蓝,刚果红和酰胺黑),靛蓝(靛红胭脂红),噻嗪(亚甲基蓝和甲苯胺蓝)和三芳基甲烷(孔雀石) 5个小时后,用ABTS /丁香嗪嗪介质介电。降解产物对普通高粱和卤虫卤虫模型生物无毒。酶介体系统在广泛的苛刻条件下显示出很高的染料生物修复潜力。
更新日期:2020-01-13
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