Cyclic Peptide Synthesis
Cyclic Peptide Synthesis - Related Videos
08:48
Development of a Backbone Cyclic Peptide Library as Potential Antiparasitic Therapeutics Using Microwave Irradiation
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Cited by 10 •
2016
A simple and general method for the synthesis of cyclic peptides using microwave irradiation is outlined. This procedure enables the synthesis of backbone cyclic peptides with a collection of different conformations while retaining the side chains and the pharmacophoric moieties., and therefore, allows to screen for the bioactive conformation.
10:12
Construction of Cyclic Cell-Penetrating Peptides for Enhanced Penetration of Biological Barriers
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Cited by 5 •
2022
This protocol describes the synthesis of cyclic cell-penetrating peptides with aromatic cross-links and the evaluation of their permeability across biological barriers.
13:37
Split-and-pool Synthesis and Characterization of Peptide Tertiary Amide Library
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Cited by 5 •
2014
Peptide tertiary amides (PTAs) are a superfamily of peptidomimetics that include but are not limited to peptides, peptoids and N-methylated peptides. Here we describe a synthetic method which combines both split-and-pool and sub-monomer strategies to synthesize a one-bead one-compound library of PTAs.
11:42
Solid Phase Synthesis of a Functionalized Bis-Peptide Using "Safety Catch" Methodology
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Cited by 2 •
2012
The efficient solid-phase peptide synthesis of a functionalized bis-peptide trimer utilizing a "safety catch" cleavage procedure from HMBA resin is described.
06:19
An Inexpensive Adaptation of a Commercial Microwave Reactor for Solid Phase Peptide Synthesis
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2024
A simple, inexpensive, and novel apparatus for performing solid phase peptide syntheses in a commercial microwave reactor is presented.
FAQs
Selective protecting groups allow chemists to control which amino acid functionalities remain available during repeated amide bond-forming couplings. After the linear sequence is assembled, removing only the designated groups exposes the sites needed for ring closure. This staged control helps separate chain construction from cyclization, so the desired intramolecular reaction can occur at the intended positions.
Ring closure restricts the flexibility available to the peptide chain and can support more defined three-dimensional conformations. That structural organization may improve resistance to enzymatic degradation while positioning functional groups for selective molecular recognition. Consequently, the resulting macrocycle can display properties that differ from those of a comparable open-chain peptide.
Head-to-tail cyclization connects the two ends of a peptide chain, whereas side-chain cyclization forms the ring through amino acid side-chain functionalities. Both strategies create a closed topology, but they use different reactive sites and therefore require different protecting-group arrangements and deprotection choices before the intramolecular bond-forming step.
A typical workflow begins by assembling a protected linear peptide through repeated amide bond-forming couplings, often while the growing chain remains attached to a solid support. Chemists then remove selected protecting groups and promote ring closure under controlled conditions. The sequence links peptide assembly, selective deprotection, and intramolecular cyclization into a single planned synthesis.
The key components are the protected linear peptide, the selected reactive sites, and the protecting groups that regulate their availability. Cyclization must occur after the appropriate groups have been removed and under controlled conditions that promote an intramolecular reaction. These choices determine whether the intended ring-forming connection can be established from the assembled sequence.
This approach is useful when researchers need peptide-based probes or therapeutics with enhanced structural stability, enzymatic resistance, or defined recognition properties. Its macrocycles can present functional groups toward protein surfaces that conventional small molecules often address poorly. Thus, the method supports chemical designs aimed at selective interactions with challenging biological targets.