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Träfflista för sökning "WFRF:(Daly Norelle L.) srt2:(2007)"

Sökning: WFRF:(Daly Norelle L.) > (2007)

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  • Plan, Manuel Rey R, et al. (författare)
  • The cyclotide fingerprint in Oldenlandia affinis : elucidation of chemically modified, linear and novel macrocyclic peptides
  • 2007
  • Ingår i: ChemBioChem. - : Wiley. - 1439-4227 .- 1439-7633. ; 8:9, s. 1001-1011
  • Tidskriftsartikel (refereegranskat)abstract
    • The complete suite of cyclotides present in Oldenlandia affinis (Rubiaceae), the plant that was originally found to contain this unique family of circular proteins, has been characterised. This study expands the number of known cyclotides in this plant to 17, of which nine new sequences (kalata B9-B17) were characterised in this work. In addition, five derivatives that contain oxidation products of the conserved tryptophan were identified, and it was shown that the formation of these derivatives is catalysed by exposure to sunlight. Furthermore, we describe two linear cyclotide analogues. These acyclic peptides have three intact disulfide bonds, and their N and C termini coincide with the hypothesised cleavage sites from the precursor protein. This work increases our knowledge about the sequence variation that is accommodated by the cyclic cystine knot scaffold, confirms its applicability as a template for drug design, and also shows the first natural degradation pathways for cyclotides. These pathways have important implications for the persistence and environmental fate of the cyclotides if used as crop-protection agents.
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