Production of recombinant rat hepatic histidase.
Rev Invest Clin
; 56(1): 43-50, 2004.
Article
em En
| MEDLINE
| ID: mdl-15144042
Rat liver histidase was expressed in E. coli by using a PCR product of the coding sequence obtained from the rat liver cDNA of histidase cloned in the expression vector pRSET. The construct (pRSET-HAL) produced a fusion protein containing a tail of polyhistidine. The expression product was purified with a resin containing Ni+ that retains proteins with polyhistidine fragments. pRSET-HAL was analyzed by restriction enzyme mapping and by sequencing confirming the correct orientation and nucleotide sequence. Native rat liver histidase was also purified and it had a Mr of 72 kDa. An antiserum against native histidase was obtained in rabbit. Western blot analysis revealed one band of 72 kDa observed in membranes containing purified histidase or rat liver high speed supernatants. The same antiserum also detected in cell lysates of E. coli transformed with the pRSET-HAL plasmid a single band of 74 kDa of the recombinant histidase before cleavage with enterokinase. After the proteolysis, the Western blot analysis showed a single band of approximately 72 kDa. Kinetic analysis of the recombinant histidase showed similar Km and Vmax compared with native histidase.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Histidina Amônia-Liase
/
Fígado
Limite:
Animals
Idioma:
En
Revista:
Rev Invest Clin
Assunto da revista:
MEDICINA
Ano de publicação:
2004
Tipo de documento:
Article
País de publicação:
México