Molecular cloning and characterization of ecto-5 '-nucleotidase from the venoms of Gloydius blomhoffi

作者：Ogawa Yuko; Murayama Nobuhiro; Yanoshita Ryohei^*

来源：Toxicon, 2009, 54(4): 408-412.

DOI：10.1016/j.toxicon.2009.05.004

• Ecto-5 '-nucleotidase
• Gloydius blomhoffi
• cDNA
• Snake venom
• Exosome

A Gloydius blomhoffi brevicaudus venom gland cDNA library was screened to isolate cDNA clones using probes based on highly conserved amino acid sequences from known ecto-5'-nucleotidases (ecto-5'-NTs). Molecular cloning of ecto-5'-NT from G. blomhoffi brevicaudus venom predicted that it was a glycosyl phosphatidylinositol-anchored membrane protein containing 588 amino acid residues with 7 potential N-linked glycosylation sites. The deduced amino acid sequence shows approximately 60% sequence identity to mammalian ecto-5'-NT sequences. This is the first report of the primary structure of ecto-5'-NT from a reptile. Gel-filtration chromatography of fresh venom from Gloydius blomhoffi blomhoffi, a subspecies of G. blomhoffi, revealed that at least a part of ecto-5'-NT is bound to exosome-like vesicles.

• 出版日期2009-9-15
• 单位河北医科大学