Chemical Protein Synthesis by Chemoselective α-Ketoacid-Hydroxylamine (KAHA) Ligations with 5-Oxaproline
作者:Vijaya R. Pattabiraman、Ayodele O. Ogunkoya、Jeffrey W. Bode
DOI:10.1002/anie.201200907
日期:2012.5.21
The chemical synthesis of proteins from unprotected peptide segments uses KAHA ligation with 5‐oxaproline, which is incorporated readily into peptides by solid‐phase peptide synthesis. Ligation of such protein segments in aqueous buffers with an α‐ketoacid peptide gives an α‐homoserine residue at the ligation site. The new ligation is used for the synthesis of two proteins, prokaryotic‐ubiquitin like
来自未保护肽段的蛋白质化学合成使用KAHA与5-氧杂脯氨酸的连接,通过固相肽合成很容易将其掺入肽中。在水性缓冲液中将此类蛋白质片段与α-酮酸肽连接,可在连接位点产生α-高丝氨酸残基。新的连接用于合成两种蛋白,原核泛素样蛋白(Pup)和可能的冷休克蛋白A(cspA;参见方案)。