Solid-phase synthesis of d-fructose-derived Heyns peptides utilizing Nα-Fmoc-Lysin[Nε-(2-deoxy-d-glucos-2-yl),Nε-Boc]-OH as building block
作者:Sebastian Schmutzler、Daniel Knappe、Andreas Marx、Ralf Hoffmann
DOI:10.1007/s00726-021-02989-7
日期:2021.6
and Heyns peptides requires sufficient quantities of pure peptides. Thus, the glycated building block Nα-Fmoc-Lys[Nε-(2-deoxy-d-glucos-2-yl),Nε-Boc]-OH (Fmoc-Lys(Glc,Boc)-OH), which was synthesized in two steps starting from unprotected d-fructose and Fmoc-l-lysine hydrochloride, was site-specifically incorporated during solid-phase peptide synthesis. The building block allowed the synthesis of a peptide
醛糖和酮糖可以糖化蛋白质,分别产生异构的 Amadori 和 Heyns 产物。显然,与d-葡萄糖相比,d-果糖更多地参与糖氧化,有利于晚期糖基化终产物 (AGEs) 的形成。虽然 Amadori 产品和糖化作用已被广泛研究,但在很大程度上不知道果糖的体内影响。异构 Amadori 和 Heyns 肽的表征需要足够数量的纯肽。因此,糖化结构单元 N α -Fmoc-Lys[N ε -(2- deoxy- d -glucos-2-yl),N ε -Boc]-OH (Fmoc-Lys(Glc,Boc)-OH),它是从未受保护的d-果糖和 Fmoc-开始分两步合成的升-赖氨酸盐酸盐,在固相肽合成过程中被定点掺入。该构件允许合成在人血清白蛋白的胰蛋白酶消化物中鉴定出的肽,该肽含有所报告的 Lys233 糖化位点。糖化氨基酸衍生物和肽的结构通过质谱和核磁共振光谱证实。重要的是,未受保护的糖部分在肽延