Histamine H3 receptor antagonists with peptidomimetic (keto)piperazine structures to inhibit Aβ oligomerisation
作者:Markus Falkenstein、David Reiner-Link、Aleksandra Zivkovic、Ian Gering、Dieter Willbold、Holger Stark
DOI:10.1016/j.bmc.2021.116462
日期:2021.11
build toxic oligomers. Design of disease modifying multi target directed ligand (MTDL) has been performed, which disable PPI on the one hand and on the other hand, act as procognitive antagonists at the histamine H3receptor (H3R). The synthetized compounds are structurally based on peptidomimetic amino acid-like structures mainly as keto, diketo-, or acyl variations of a piperazine moiety connected to
阿尔茨海默病 (AD) 是最突出的神经退行性疾病,具有很高的医疗需求。蛋白质-蛋白质-相互作用 (PPI) 相互作用在 AD 中具有关键作用,其中 β-淀粉样蛋白结构 (Aβ) 构建有毒低聚物。已经进行了疾病修饰多靶点定向配体 (MTDL) 的设计,其一方面禁用 PPI,另一方面作为组胺 H 3受体 (H 3 R) 的促认知拮抗剂。合成的化合物在结构上基于肽模拟氨基酸样结构,主要是与 H 3 R 药效团连接的哌嗪部分的酮基、二酮基或酰基变体。它们中的大多数在 H 3处表现出低纳摩尔亲和力R 和一些对 Aβ-单体具有良好亲和力的物质。所描述的结构-活性关系 (SAR) 为 MTDL 提供了新的可能性,其优化的配置文件结合了 AD 中的症状和潜在因果治疗方法。
Direct Structural Comparison of a Rigid Cyclic Peptidic Scaffold Using Crystallography and NMR in Strained PH Polymer Gels
作者:Christopher J. Arnusch、Johannes H. Ippel、Huub Kooijman、Anthony L. Spek、Rob M. J. Liskamp、Johan Kemmink、Roland J. Pieters
DOI:10.1002/ejoc.201000440
日期:——
ether containing cyclicpeptidicscaffolds was synthesized and cyclized by an SNAr reaction. The structure of one rigidscaffold was solved by X-ray crystallography and also determined in solution by NMR spectroscopy. Molecular alignment of the peptidicscaffold in strainedPHpolymergels in [D6]DMSO was applied to extract residual dipolar couplings (RDCs). The RDC values were used to obtain a structure
Serine-Protease-Assisted Synthesis of Peptide Substrates for ?-Chymotrypsin
作者:Spartaco A. Bizzozero、Bruno A. Rovagnati、Hans Dutler
DOI:10.1002/hlca.19820650605
日期:1982.9.22
δ-Chymotraypsin catalyzes peptide-bondformation between acylated amino-acid and peptide esters as the carboxyl component and amino-acid and peptide amides as the amino component. The conditions under which enzyme-catalyzed coupling can be used for fragment condensation in peptide synthesis is investigated. To illustrate the method the synthesis of tetra-, penta- and hexapeptides of the structure Ac-Lxn
[EN] ACYLATION OF TYROSINE UNITS IN PEPTIDE COMPOUNDS<br/>[FR] ACYLATION D'UNITÉS TYROSINE DANS DES COMPOSÉS PEPTIDIQUES
申请人:UNIV DEL PAIS VASCO/EUSKAL HERRIKO UNIBERTSITATEA
公开号:WO2021165233A1
公开(公告)日:2021-08-26
The present invention refers to a process for the selective modification of tyrosine units in a peptide sequence, in particular, by incorporating acyl groups in the ortho position of the hydroxyl residue of its aromatic ring. Likewise, the invention also relates to a peptide sequence comprising at least one mono- or di-functionalized tyrosine unit with said acyl group in the aromatic ring, as well as to a pharmaceutical composition comprising said sequence.
4‐Dihydroxyphenylalanine (DOPA)‐containing peptides and proteins provide attractive design paradigms for pharmaceutical applications and engineering of synthetic polymers. An efficient and selective route to DOPApeptides by oxidation of L‐tyrosine derivatives with tyrosinase is reported. The efficiency of the procedure was tested by using successively recycled tyrosinaseimmobilized on Eupergit®C250L and