Novel cyclic and linear peptides of the formula R
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—X—X
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—X
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—X
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—X
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—X
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—X
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—X
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—X
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—X
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—X
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—X
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—R
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are useful in the treatment of obesity are provided.
US7541430B2
申请人:——
公开号:US7541430B2
公开(公告)日:2009-06-02
Structural modification of the tripeptide KPV by reductive “glycoalkylation” of the lysine residue
作者:Abigael C. Songok、Pradip Panta、William T. Doerrler、Megan A. Macnaughtan、Carol M. Taylor
DOI:10.1371/journal.pone.0199686
日期:——
alkylated with a glucose derivative to afford a dihydroxylated piperidine in place of the amine. A similar modification was applied to H-KPV-NH2, a tripeptide derived from the α-melanocyte stimulating hormone (α-MSH) reported to have antimicrobial and anti-inflammatory properties. Antimicrobial assays, under a variety of conditions, showed no activity for Ac-KPV-NH2 or the α- or ε-glycoalkylated analogs. Glycoalkylated
The amidated peptides are an important class of biologically active compounds due to their unique biological properties and wide applications as potential peptide drugs and biomarkers. Despite the abundance of free amide motifs (Asn, Gln, and C-terminal amide) in native peptides, late-stage modification of the amide unit in naturally occurring peptides remains very rare because of the intrinsically
酰胺化肽因其独特的生物学特性和作为潜在肽药物和生物标志物的广泛应用而成为一类重要的生物活性化合物。尽管天然肽中含有丰富的游离酰胺基序(Asn、Gln 和 C 端酰胺),但天然肽中酰胺单元的后期修饰仍然非常罕见,因为酰胺本身亲核性较弱,并且存在多个竞争性亲核残基的干扰,通常会导致不希望的副反应。在此,已在空气气氛下开发了未受保护的多肽中酰胺的化学选择性芳基化,以提供N-带有各种功能基序的芳基酰胺肽。它的成功依赖于金催化和银盐的结合,以区分一系列反应性亲核氨基酸残基(例如,-NH 2、-OH和-COOH)中相对惰性的酰胺,有利于C-N键偶联酰胺优于其他亲核基团。实验和 DFT 研究揭示了银阳离子的关键作用,它充当更具反应性的反应位点的瞬时配位掩模,克服了酰胺固有的低反应性。该策略优异的生物相容性已应用于多种肽药物和复合肽的功能化。该应用可以进一步扩展到肽标记和肽装订。