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首页> 外文期刊>Biochemical and Biophysical Research Communications >Cloning expression and analysis of phytochelatin synthase (pcs) gene from Anabaena sp. PCC 7120 offering multiple stress tolerance in Escherichia coli.
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Cloning expression and analysis of phytochelatin synthase (pcs) gene from Anabaena sp. PCC 7120 offering multiple stress tolerance in Escherichia coli.

机译:鱼腥藻属植物植物螯合素合酶(pcs)基因的克隆表达与分析。 PCC 7120在大肠杆菌中具有多种耐压性。

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摘要

Phytochelatin synthase (PCS) is involved in the synthesis of phytochelatins (PCs), plays role in heavy metal detoxification. The present study describes for first time the functional expression and characterization of pcs gene of Anabaena sp. PCC 7120 in Escherichia coli in terms of offering protection against heat, salt, carbofuron (pesticide), cadmium, copper, and UV-B stress. The involvement of pcs gene in tolerance to above abiotic stresses was investigated by cloning of pcs gene in expression vector pGEX-5X-2 and its transformation in E. coli BL21 (DE3). The E. coli cells transformed with pGEX-5X-pcs showed better growth than control cells (pGEX-5X-2) under temperature (47 degrees C), NaCl (6% w/v), carbofuron (0.025 mg ml(-1)), CdCl2 (4 mM), CuCl2 (1mM), and UV-B (10 min) exposure. The enhanced expression of pcs gene revealed by RT-PCR analysis under above stresses at different time intervals further advocates its role in tolerance against above abiotic stresses.
机译:植螯素合酶(PCS)参与植物螯合素(PCs)的合成,在重金属排毒中发挥作用。本研究首次描述了鱼腥藻pcs基因的功能表达和表征。大肠杆菌中的PCC 7120,可提供抵抗热,盐,碳呋喃酮(农药),镉,铜和UV-B胁迫的保护作用。通过克隆表达载体pGEX-5X-2中的pcs基因及其在大肠杆菌BL21(DE3)中的转化,研究了pcs基因对上述非生物胁迫的耐受性。用pGEX-5X-pcs转化的大肠杆菌细胞在温度(47摄氏度),NaCl(6%w / v),碳呋喃(0.025 mg ml(-1)下显示出比对照细胞(pGEX-5X-2)更好的生长),CdCl2(4 mM),CuCl2(1mM)和UV-B(10分钟)曝光。 RT-PCR分析显示,在不同时间间隔以上胁迫下,pcs基因的表达增强,进一步证明了其对上述非生物胁迫的耐受性。

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