期刊
TOXICON
卷 54, 期 4, 页码 408-412出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.toxicon.2009.05.004
关键词
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. (C) 2009 Elsevier Ltd. All rights reserved.
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