Cloning and high-level expression of Thermus thermophilus RecA in E. coli: purification and novel use in HBV diagnostics
Braz. j. microbiol
; 49(4): 848-855, Oct.-Dec. 2018. tab, graf
Artigo
em Inglês
| LILACS
| ID: biblio-974300
Biblioteca responsável:
BR1.1
ABSTRACT
ABSTRACT We studied the role of Thermus thermophilus Recombinase A (RecA) in enhancing the PCR signals of DNA viruses such as Hepatitis B virus (HBV). The RecA gene of a thermophilic eubacterial strain, T. thermophilus, was cloned and hyperexpressed in Escherichia coli. The recombinant RecA protein was purified using a single heat treatment step without the use of any chromatography steps, and the purified protein (>95%) was found to be active. The purified RecA could enhance the polymerase chain reaction (PCR) signals of HBV and improve the detection limit of the HBV diagnosis by real time PCR. The yield of recombinant RecA was ∼35 mg/L, the highest yield reported for a recombinant RecA to date. RecA can be successfully employed to enhance detection sensitivity for the diagnosis of DNA viruses such as HBV, and this methodology could be particularly useful for clinical samples with HBV viral loads of less than 10 IU/mL, which is interesting and novel.
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Contexto em Saúde:
Doenças Negligenciadas
Problema de saúde:
Doenças Negligenciadas
/
Zoonoses
Base de dados:
LILACS
Assunto principal:
Proteínas de Bactérias
/
Vírus da Hepatite B
/
Reação em Cadeia da Polimerase
/
Thermus thermophilus
/
Clonagem Molecular
/
Recombinases
Tipo de estudo:
Estudo diagnóstico
Idioma:
Inglês
Revista:
Braz. j. microbiol
Assunto da revista:
Microbiologia
Ano de publicação:
2018
Tipo de documento:
Artigo
País de afiliação:
Índia
Instituição/País de afiliação:
Rangadore Memorial Hospital/IN