Painting argyrins blue: Negishi cross-coupling for synthesis of deep-blue tryptophan analogue ß-(1-azulenyl)-l alanine and its incorporation into argyrin C.
Bioorg Med Chem
; 26(19): 5259-5269, 2018 10 15.
Article
em En
| MEDLINE
| ID: mdl-29729984
ABSTRACT
The argyrins are a family of non-ribosomal peptides that exhibits different biological activities through only small structural changes. Ideally, a biologically active molecule can be tracked and observed in a variety of biological and clinical settings in a non-invasive manner. As a step towards this goal, we report here a chemical synthesis of unnatural deep blue amino acid ß-(1-azulenyl)-l alanine with different fluorescence and photophysical properties, which allows a spectral separation from the native tryptophan signal. This might be especially useful for cell localization studies and visualizing the targeted proteins. In particular, the synthesis of ß-(1-azulenyl)-l alanine was achieved through a Negishi coupling which proved to be a powerful tool for the synthesis of unnatural tryptophan analogs. Upon ß-(1-azulenyl)-l alanine incorporation into argyrin C, deep blue octapeptide variant was spectrally and structurally characterized.
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MEDLINE
Assunto principal:
Peptídeos Cíclicos
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Sesquiterpenos
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Alanina
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article