2015
DOI: 10.1021/acs.orglett.5b01162
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Peptide to Peptoid Substitutions Increase Cell Permeability in Cyclic Hexapeptides

Abstract: The effect of peptide-to-peptoid substitutions on the passive membrane permeability of an N-methylated cyclic hexapeptide is examined. In general, substitutions maintained permeability but increased conformational heterogeneity. Diversification with nonproteinogenic side chains increased permeability up to 3-fold. Additionally, the conformational impact of peptoid substitutions within a β-turn are explored. Based on these results, the strategic incorporation of peptoid residues into cyclic peptides can maintai… Show more

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Cited by 75 publications
(81 citation statements)
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“…Oligomers of N-substituted glycine units ("peptoids") were originally conceived as synthetic peptide derivatives that possess the modularity and protein binding characteristics of peptides but avoid the pitfalls associated with the notoriously poor metabolic stability of peptides (43,44). Peptide-to-peptoid substitutions can increase or maintain the ability of cyclic peptides to permeate eukaryotic cells while enabling greater side chain diversity than that in the pool of commercially available amino acids (45). The phepropeptins are cyclic hexapeptides isolated from Streptomyces sp.…”
Section: Discussionmentioning
confidence: 99%
“…Oligomers of N-substituted glycine units ("peptoids") were originally conceived as synthetic peptide derivatives that possess the modularity and protein binding characteristics of peptides but avoid the pitfalls associated with the notoriously poor metabolic stability of peptides (43,44). Peptide-to-peptoid substitutions can increase or maintain the ability of cyclic peptides to permeate eukaryotic cells while enabling greater side chain diversity than that in the pool of commercially available amino acids (45). The phepropeptins are cyclic hexapeptides isolated from Streptomyces sp.…”
Section: Discussionmentioning
confidence: 99%
“…[48] Wegen der extrem großen Oberfläche des Darms liefert diese Route einen erheblichen Beitrag zur Wirkstoffaufnahme in das System, solange die Permeabilitätn icht von Tr ansportern abhängt. Camenisch et al [49] und Schwochert et al [50] zeigten durch Modifikation an cyclischen Peptiden, dass durch Hinzufügen von lipophilen Seitenketten die passive transzelluläre Permeabilitäte ines vorgegebenen Peptids erhçht werden kann. Camenisch et al [49] und Schwochert et al [50] zeigten durch Modifikation an cyclischen Peptiden, dass durch Hinzufügen von lipophilen Seitenketten die passive transzelluläre Permeabilitäte ines vorgegebenen Peptids erhçht werden kann.…”
Section: Biologische Aufnahme Und Ihre Evaluierungunclassified
“…At Pfizer, and across multiple academic collaborations [38,[89][90][91], project teams routinely use EPSA data to inform peptide design as a predictor of permeability and as an indicator of IMHB patterns in cyclic peptides. Furthermore, EPSA is now used in a prospective way after the development of an in-house computational model [92].…”
Section: Epsa and Peptidesmentioning
confidence: 99%