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Peptide Bonds

Peptide Bonds

A peptide bond covalently attaches amino acids through a dehydration reaction. One amino acid's carboxyl group and another amino acid's amino group combine, releasing a water molecule. The resulting bond is the peptide bond. The products that such linkages form are peptides. As more amino acids join this growing chain, the resulting chain is a polypeptide. Each polypeptide has a free amino group at one end. This end has the N-terminal, or the amino-terminal, and the other end has a free...

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Updated: May 26, 2026

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

Published on: May 15, 2012

Solid-phase synthesis of functionalized bis-peptides.

Zachary Z Brown¹, Jennifer Alleva, Christian E Schafmeister

¹Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15213, USA.

|December 20, 2011

Summary

This summary is machine-generated.

Researchers developed solid-phase synthesis for functionalized bis-peptides, ladder oligomers with shape-programmable backbones. This breakthrough enables mimicking alpha-helical peptide structures for advanced biomaterial applications.

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Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology

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Published on: November 2, 2011

Area of Science:

Organic Chemistry
Peptide Chemistry
Synthetic Biology

Background:

Bis-peptides are ladder oligomers with shape-programmable backbones.
Controlling stereochemistry and sequence dictates bis-peptide structure.
Existing synthesis methods face challenges with hindered amino acids.

Purpose of the Study:

To demonstrate the first solid-phase synthesis of highly functionalized bis-peptides.
To develop novel methods for assembling complex bis-peptide structures.
To explore the potential of bis-peptides in mimicking alpha-helical peptide structures.

Main Methods:

Solid-phase synthesis utilizing a novel acyl-transfer coupling reaction.
A new activation strategy for sequential diketopiperazine formation.
Synthesis of four distinct functionalized bis-peptides.

Main Results:

Successful solid-phase synthesis of functionalized bis-peptides.
Demonstration of sequential penta- and hexa-substituted diketopiperazine formation.
Mechanistic evidence supporting acyl-transfer coupling's efficacy with hindered amino acids.
Bis-peptides were shown to mimic residue display patterns of alpha-helical peptides.

Conclusions:

Solid-phase synthesis of functionalized bis-peptides is now achievable.
The developed methods overcome limitations in synthesizing hindered peptide structures.
Bis-peptides offer a novel platform for mimicking and potentially replacing alpha-helical peptide functions.