Peptide Backbone Composition and Protease Susceptibility: Impact of Modification Type, Position, and Tandem Substitution
作者:Halina M. Werner、Chino C. Cabalteja、W. Seth Horne
DOI:10.1002/cbic.201500312
日期:2016.4.15
Modification station: We report here a systematic comparison of the enzymatic protection imparted by four backbonemodifications commonly employed in the design of protease‐stable analogues of peptides and proteins. These results promise to inform ongoing work to develop biostable mimics with increasingly sophisticated structures and functions.
(Ang IV, Val1-Tyr2-Ile3-His4-Pro5-Phe6) targeting the insulin-regulatedaminopeptidase (IRAP) have been designed, synthesized, and evaluated biologically. Replacement of His4-Pro5-Phe6 by a 2-(aminomethyl)phenylacetic acid (AMPAA) moiety and of Val1 and Ile3 by amino acids bearing olefinic side chains followed by macrocyclization provided potent IRAP inhibitors. The impact of the ring size and the type
The application of anisole in greener solid-phase peptide synthesis protocols – Compatibility with green bases in Fmoc removal and new green binary mixture for coupling
side product of SPPS. We also introduced a new green solvent mixture, anisole/dimethyl sulfoxide (DMSO) (4:1) for acylation step, which did not cause racemization. The applicability of these new green protocols was shown during SPPS of the pentapeptides Leu-enkephalin and Aib-enkephalin using polystyrene (PS)-based resins. Additionally, we identified the new sequence-dependent side products that formed
Solid-Phase Synthesis of <i>N</i>-Nosyl- and <i>N</i>-Fmoc-<i>N</i>-Methyl-α-amino Acids
作者:Maria Luisa Di Gioia、Antonella Leggio、Angelo Liguori、Francesca Perri
DOI:10.1021/jo070075m
日期:2007.5.1
convenient and simple solid-phasesynthesis of N-nosyl-N-methyl-α-amino acids and N-Fmoc-N-methyl-α-amino acids, important building blocks for the synthesis of conformationally restricted and protease-resistant natural peptides and peptide analogues. The methodology involves the use of 2-chlorotrityl chloride resin to temporarily protect the carboxylic group of α-amino acids and of diazomethane as
Solid-phase synthesis of cyclic peptide chitinase inhibitors: SAR of the argifin scaffold
作者:Mark J. Dixon、Amit Nathubhai、Ole A. Andersen、Daan M. F. van Aalten、Ian M. Eggleston
DOI:10.1039/b815077j
日期:——
Asp residue to the solidsupport and assembly of the linear peptide chain by Fmoc SPPS prior to cyclisation and side-chain manipulation on-resin. Introduction of the key N-methyl carbamoyl-substituted Arg side chain is achieved viaderivatisation of a selectively protected Orn residue, prior to cleavagefrom the resin and side-chain deprotection. A severe aspartimide side-reaction observed upon final
一种新型、高效、全固相合成精氨酸据报道,一种天然产物环状五肽几丁质酶抑制剂。该合成的特点是在树脂上进行环化和侧链操作之前,将正交保护的 Asp 残基附着到固体支持物上,并通过 Fmoc SPPS 组装线性肽链。在从树脂上裂解和侧链脱保护之前,通过选择性保护的 Orn 残基的衍生化来引入关键的N-甲基氨基甲酰基取代的 Arg 侧链。通过使用新型水性酸解程序,避免了最终脱保护时观察到的严重天冬酰亚胺副反应。通过一系列的制备证明了合成的灵活性精氨酸根据与代表性家族 18 几丁质酶复合的天然产物的 X 射线结构设计的类似物。