Synthesis Using a Fmoc-Based Strategy and Biological Activities of Some Reduced Peptide Bond Pseudopeptide Analogs of Dynorphin A
作者:Jean-Philippe Meyer、Peg Davis、Katharine B. Lee、Frank Porreca、Henry I. Yamamura、Victor J. Hruby
DOI:10.1021/jm00018a006
日期:1995.9
modifications of the peptidebond in the address site (analogues 4-9) do not affect the binding at the kappa receptor and, with a few exceptions, at the mu and delta receptors. On the other hand, analogues 2 and 3, modified in the message segment of Dyn A(1-11)-NH2, show a decrease in binding affinity at all three receptors. In the GPI, the results are more varied as the influence of the peptidebond modification
Formation of bis (Fmoc-amino ethyl)-N-glycine derivatives by reductive amination of Fmoc-amino aldehydes with NaBH3CN
作者:Jean-Paul Salvi、Nadia Walchshofer、Joelle Paris
DOI:10.1016/0040-4039(94)88018-2
日期:1994.2
amination of Fmoc-amino aldehydes by NaBH3CN are described. From glycine and Fmoc-4-t-Butoxy-tyrosinal, a small amount of double condensation product was obtained beside the initially desired product Fmoc-Tyr(OtBu)-ψ(CH2NH)-Gly-OH. From glycine methyl ester and Fmoc-glycinal, we only recovered the reduced peptide bond isostere, but from glycine and Fmoc-glycinal, bis(Fmoc-amino ethyl)-N-glycine was obtained
A facile one step synthesis of a wide variety of N-protected (Boc, Z, Fmoc) α-amino aldehydes under mild conditions is described. Pure N-protected (Boc, Z, Fmoc) α-amino aldehydes were obtained in high yields by reduction of N-protected (Z, Boc, Fmoc)-N-carboxyanhydrides (UNCAs) with equivalent amounts of lithium tris(tertbutoxy)aluminium hydride [LiAlH(O-t-Bu)3] or lithium tris[(3-ethyl-3-pentyl)oxy]aluminium
Comparison of backbone modification in protein β-sheets by α→γ residue replacement and α-residue methylation
作者:George A. Lengyel、Zachary E. Reinert、Brian D. Griffith、W. Seth Horne
DOI:10.1039/c4ob00886c
日期:——
The mimicry of protein tertiary structure by oligomers with unnatural backbones is a significant contemporary research challenge. Among common elements of secondary structure found in natural proteins, sheets have proven the most difficult to address. Here, we report the systematic comparison of different strategies for peptide backbone modification in β-sheets with the goal of identifying the best method for replacing a multi-stranded sheet in a protein tertiary fold. The most effective sheet modifications examined led to native-like tertiary folding behavior with a thermodynamic folded stability comparable to the prototype protein on which the modified backbones are based.
Solid phase synthesis of ψ[CH(CN)NH] pseudopeptides. Application to the synthesis of analogues of neurotensin [NT(8–13)].
作者:Rosario Herranz、M.Luisa Suárez-Gea、M.Teresa García-López、Rosario González-Muñiz、Nils L. Johansen、Kjeld Madsen、Henning Thogersen、Peter Suzdak
DOI:10.1016/s0040-4039(00)61430-2
日期:1993.12
cyanomethyleneamino [CH(CN)NH] group, a new type of peptide bond surrogate, under solid phase peptide synthesis conditions has been studied using both Boc and Fmoc strategies. The pseudohexapeptides H-Arg-Pro-Tyrψ[CH(CN)NH]Ile-Leu-OH (1) and H-Arg-Arg-Pro-Tyr-Ileψ[CH(CN)NH]Leu-OH (2), analogues of the C-terminal hexapeptide of neurotensin [NT(8–13)], were successfully obtained via Fmoc synthesis.