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Activity of the plant peptide aglycin in mammalian systems
Author(s) -
Dun XinPeng,
Wang JianHe,
Chen Lei,
Lu Jie,
Li FaFang,
Zhao YanYing,
Cederlund Ella,
Bryzgalova Galina,
Efendic Suad,
Jörnvall Hans,
Chen ZhengWang,
Bergman Tomas
Publication year - 2007
Publication title -
the febs journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 204
eISSN - 1742-4658
pISSN - 1742-464X
DOI - 10.1111/j.1742-4658.2006.05619.x
Subject(s) - trypsin , peptide , biochemistry , proteolysis , protease , pepsin , chemistry , molecular mass , bovine serum albumin , in vitro , surface plasmon resonance , albumin , affinity chromatography , biology , chromatography , enzyme , materials science , nanoparticle , nanotechnology
A 37 residue peptide, aglycin, has been purified from porcine intestine. The sequence is identical to that of residues 27–63 of plant albumin 1 B precursor (PA1B, chain b) from pea seeds. Aglycin resists in vitro proteolysis by pepsin, trypsin and Glu‐C protease, compatible with its intestinal occurrence and an exogenous origin from plant food. When subcutaneously injected into mice (at 10 µg·g −1 body weight), aglycin has a hyperglycemic effect resulting in a doubling of the blood glucose level within 60 min. Using surface plasmon resonance biosensor technology, an aglycin binding protein with an apparent molecular mass of 34 kDa was detected in membrane protein extracts from porcine and mice pancreas. The polypeptide was purified by affinity chromatography and identified through peptide mass fingerprinting as the voltage‐dependent anion‐selective channel protein 1. The results indicate that aglycin has the potential to interfere with mammalian physiology.