Activity of the plant peptide aglycin in mammalian systems

作者：Dun Xin Peng; Wang Jian He; Chen Lei; Lu Jie; Li Fa Fang; Zhao Yan Ying; Cederlund Ella; Bryzgalova Galina; Efendic Suad; Jornvall Hans; Chen Zheng Wang; Bergman Tomas^*

来源：FEBS Journal, 2007, 274(3): 751-759.

DOI：10.1111/j.1742-4858.2006.05619.x

• aglycin
• albumin 1 B precursor
• blood glucose
• mice
• voltage-dependent anion-selective channel protein 1

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 mu g.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.

• 出版日期2007-2
• 单位华中科技大学