Synthesis of an Isotopically-labelled Antarctic Fish Antifreeze Glycoprotein Probe
作者:Joanna M. Wojnar、Clive W. Evans、Arthur L. DeVries、Margaret A. Brimble
DOI:10.1071/ch10464
日期:——
Antifreeze glycoproteins (AFGPs) are glycosylated polypeptides produced by Antarctic and Arctic fishes, which allow them to survive in seawater at sub-zero temperatures. An investigation into the postulated enteric uptake of AFGP synthesized in the exocrine pancreas of Antarctic fishes required a custom-prepared AFGP probe that incorporated seven isotopically-labelled Ala residues for detection by
抗冻糖蛋白(AFGP)是南极和北极鱼类产生的糖基化多肽,可以使它们在低于零温度的海水中生存。对南极鱼类外分泌胰腺中合成的AFGP的假定肠摄取的调查,需要定制的AFGP探针,该探针结合了7个同位素标记的Ala残基,用于质谱检测。的AFGPs由重复的三个氨基酸单元(丙氨酸-丙氨酸-苏氨酸),其中,所述苏氨酸残基是糖基化与二糖的β- d -Gal-(1→3)-α- d -GalNAc。同位素标记的AFGP8(1)的合成,以及受保护的糖基化氨基酸构件2的优化合成,已报告。