Data/hora: 19/05/2024 16:20:51

Provedor de dados: 	69	
País: 	Chile	
Título: 	A simple and efficient method for extraction of Taq DNA polymerase	
Autores: 	Chen,Sique; Zheng,Xiujuan; Cao,Hongrui; Jiang,Linghui; Liu,Fangqian; Sun,Xinli.	
Data: 	2015-09-01	
Ano: 	2015	
Palavras-chave: 	Ethanol precipitation; PCR; Purification; Taq DNA polymerase.	
Resumo: 	Background Thermostable DNA polymerase (Taq Pol ?) from Thermus aquaticus has been widely used in PCR, which was usually extracted with Pluthero's method. The method used ammonium sulfate to precipitate the enzyme, and it saved effort and money but not time. Moreover, we found that 30-40% activity of Taq Pol I was lost at the ammonium sulfate precipitation step, and the product contained a small amount of DNA. Results We provided a novel, simplified and low-cost method to purify the Taq Pol ? after overproduction of the enzyme in Escherichia coli, which used ethanol instead of ammonium sulfate to precipitate the enzyme. The precipitate can be directly dissolved in the storage buffer without dialysis. In addition, DNA and RNA contamination was removed with DNase I and RNase A before precipitation, and the extraction procedure was optimized. Our improvements increase recovery rate and specific activity of the enzyme, and save labor, time, and cost. Conclusions Our method uses ethanol, DNase I, and RNase A to purify the Taq Pol ?, and simplifies the operation, and increases the enzyme recovery rate and quality.	
Tipo: 	Journal article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000500005	
Editor: 	Pontificia Universidad Católica de Valparaíso	
Formato: 	text/html	
Fonte: 	Electronic Journal of Biotechnology  v.18 n.5 2015