Highly sensitive pyrosequencing based on the capture of free adenosine 5' phosphosulfate with adenosine triphosphate sulfurylase.
Anal Chem
; 83(9): 3600-5, 2011 May 01.
Article
em En
| MEDLINE
| ID: mdl-21438613
ABSTRACT
In pyrosequencing chemistry, four cascade enzymatic reactions with the catalysis of polymerase, adenosine triphosphate (ATP) sulfurylase, luciferase, and apyrase are employed. The sensitivity of pyrosequencing mainly depends on the concentration of luciferase which catalyzes a photoemission reaction. However, the side-reaction of adenosine 5' phosphosulfate (APS, an analogue of ATP) with luciferase resulted in an unavoidable background signal; hence, the sensitivity cannot be much higher due to the simultaneous increase of the background signal when a larger amount of luciferase is used. In this study, we demonstrated a sensitive pyrosequencing using a large amount of ATP sulfurylase to lower the concentration of free APS in the pyrosequencing mixture. As the complex of ATP sulfurylase and APS does not react with luciferase, a large amount of luciferase can be used to achieve a sensitive pyrosequencing reaction. This sensitivity-improving pyrosequencing chemistry allows the use of an inexpensive light sensor photodiode array for constructing a portable pyrosequencer, a potential tool in a point-of-care test (POCT).
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Sulfato Adenililtransferase
/
Adenosina Fosfossulfato
/
Análise de Sequência de DNA
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Anal Chem
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
China