301843-65-2Relevant academic research and scientific papers
Synthesis of an isotopically-labelled antarctic fish antifreeze glycoprotein probe
Wojnar, Joanna M.,Evans, Clive W.,Devries, Arthur L.,Brimble, Margaret A.
, p. 723 - 731 (2012/07/14)
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 mass spectrometry. The AFGPs are composed of a repetitive three amino acid unit (Ala-Ala-Thr), in which the threonine residue is glycosylated with the disaccharide β-d-Gal-(1→3) α-d-GalNAc. The synthesis of isotopically-labelled AFGP8 (1), as well as the optimized synthesis of the protected glycosylated amino acid building block 2, is reported.
A facile silyl linker strategy for the solid-phase synthesis of protected glycopeptide: Synthesis of an N-terminal fragment of IL-2 (1-10)
Ishii, Akira,Hojo, Hironobu,Kobayashi, Aki,Nakamura, Kazuhiko,Nakahara, Yuko,Ito, Yukishige,Nakahara, Yoshiaki
, p. 6235 - 6243 (2007/10/03)
An N-terminal glycodecapeptide fragment of interleukin 2 (1) was synthesized by solid-phase method utilizing a new silyl linker. The O-silylated Fmoc-Thr-OAll was attached to the commercial HMP-resin and peptide chain elongation was performed by Fmoc protocol to produce a protected heptapeptide (3-10), which was cleaved from the resin by fluoridolysis and used as the amino component for further condensation on the solid support. On the other hand, 6-hydroxyl group of an Fmoc-Thr(GalNAc)-OAll derivative was silylated with the linker and attached to the resin. Deallylation, block condensation with the heptapeptide (3-10), and elongation at N-terminal with two amino acids were performed on the resin. Fluoride ion-mediated cleavage released the N- and C-protected glycopeptide from the solid support in good efficiency. Fully deprotected glycopeptide was also synthesized through on-resin deallylation and acidic cleavage of the silyl ether linkage. (C) 2000 Elsevier Science Ltd.
