Photoinduced electron transfer between non-native donor-acceptor moieties incorporated in synthetic polypeptide aggregates.
A series of analogous photoactive polypeptides that form helical homo and hetero aggregates in aqueous media were prepared. A pyrenyl ketone (the principal chromophore and an electron acceptor) was attached to the N-termini. An electron donor, amidoethylcarbazole, was introduced as a side chain of a non-native amino acid, NCb, 14 residues away. Photoinduced electron-transfer rate constants of the order of 10(8) s(-1) between remote pyrene and carbazole were measured. [structure: see text]
Jones
Guilford
G
Department of Chemistry and Photonics Center, Boston University, Boston, MA 02215, USA. jones@chem.bu.edu
Vullev
Valentine I
VI
D000595:Amino Acid Sequence; D002942:Circular Dichroism; D004579:Electron Transport; D007202:Indicators and Reagents; D008027:Light; D010455:Peptides / Q000138:chemical synthesis / Q000737:chemistry* / Q000528:radiation effects; D011487:Protein Conformation
D007202:Indicators and Reagents; D010455:Peptides