Expression and Enzyme Activity Detection of a Sepiapterin Reductase Gene from Musca domestica Larva.
Appl Biochem Biotechnol
; 181(2): 604-612, 2017 Feb.
Article
en En
| MEDLINE
| ID: mdl-27704475
ABSTRACT
Tetrahydrobiopterin (BH4) is an essential cofactor for aromatic acid hydroxylases and nitric oxide synthase. Sepiapterin reductase (SPR) catalyzes the final steps of BH4 biosynthesis. Studies on SPR from several insects and other organisms have been reported. However, thus far, enzyme activity of SPR in Musca domestica is kept unknown. In this study, 186 differentially expressed genes including SPR gene from Musca domestica (MDSPR) were screened in subtractive cDNA library. The MDSPR gene was cloned, and the recombinant MDSPI16 protein was expressed as a 51-kDa protein in soluble form. The MDSPR exhibited strong activity to the substrate sepiapterin (SP). The values of Vmax and Km of the MDSPR for SP were 6.83 µM/min and 23.48 µM, and the optimum temperature and pH of MDSPR were 50 °C and 4.0, respectively. This study provides new hypotheses and methods for the production of BH4 using insect-derived SPR.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Biopterinas
/
Oxidorreductasas de Alcohol
/
Moscas Domésticas
/
Larva
Tipo de estudio:
Diagnostic_studies
Límite:
Animals
Idioma:
En
Revista:
Appl Biochem Biotechnol
Año:
2017
Tipo del documento:
Article
País de afiliación:
China