title: Highly sensitive pyrosequencing based on the capture of free adenosine 5' phosphosulfate with adenosine triphosphate sulfurylase.
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).
authors: Huadong Research Institute for Medicine and Biotechnics, Nanjing, China.
authors: Haiping
authors: H
authors: Wu
authors: Wenjuan
authors: W
authors: Wu
authors: Zhiyao
authors: Z
authors: Chen
authors: Weipeng
authors: W
authors: Wang
authors: Guohua
authors: G
authors: Zhou
authors: Tomoharu
authors: T
authors: Kajiyama
authors: Hideki
authors: H
authors: Kambara
mesh_terms: D000250:Adenosine Phosphosulfate / Q000378:metabolism*; D016477:Artifacts; D001483:Base Sequence; D005814:Genes, Viral / Q000235:genetics; D053118:Influenza A Virus, H1N1 Subtype / Q000235:genetics; D008156:Luciferases / Q000378:metabolism; D017422:Sequence Analysis, DNA / Q000379:methods*; D013430:Sulfate Adenylyltransferase / Q000378:metabolism*
chemical_list: D000250:Adenosine Phosphosulfate; D008156:Luciferases; D013430:Sulfate Adenylyltransferase