Cloning and expression of Streptococcus salivarius urease gene in Escherichia coli / 中华口腔医学杂志
Chinese Journal of Stomatology
;
(12): 498-501, 2010.
Artículo
en Chino
| WPRIM
| ID: wpr-243172
ABSTRACT
<p><b>OBJECTIVE</b>To clone Streptococcus salivarius (Ss) 57. I urease gene, which can express ureolytic activity in Escherichia coli (Ec) without adding extra nickel ions.</p><p><b>METHODS</b>Urease gene was cloned by polymerase chain reaction in three separate parts. The three separate plasmids were digested by specific restriction enzymes and ligated together. The expression of the complete urease gene in Ec was detected by phenol red assay and pH analysis.</p><p><b>RESULTS</b>Urease gene of Ss 57.I was eventually cloned and proved correct. Urease activity of the obtained clone was positive in Ec. Without adding extra NiCl(2), the recombinant Ec could hydrolyze urea to produce ammonia, resulting in the increase of pH value.</p><p><b>CONCLUSIONS</b>The clone of Ss urease gene obtained in this study could express ureolytic activity in Ec without adding extra nickel ions. The current clone can be used to construct ureolytic effector strain used in replacement therapy in caries prevention.</p>
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Asunto principal:
Streptococcus
/
Ureasa
/
Química
/
Clonación de Organismos
/
Caries Dental
/
Escherichia coli
/
Genética
/
Concentración de Iones de Hidrógeno
/
Microbiología
/
Níquel
Idioma:
Chino
Revista:
Chinese Journal of Stomatology
Año:
2010
Tipo del documento:
Artículo
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