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• W2057505488 abstract "The binding to DNA of a mixed function ligand (NETGA) is described, in which a potential intercalating group, an acridine moiety, is incorporated at the carboxyl terminus of the minor groove binding oligopeptide netropsin skeleton. Scatchard analysis of absorption data provided evidence of two modes of binding to DNA with K1 = 9.1 × 105 M−1 at low r values (0.003–0.1), and a binding site size n = 10, indicative of binding of both moeities. At high binding ratios (>0.1), K2 = 0.9 × 105 M−1 and n = 5 corresponding to external binding. Complementary strand MPE footprinting on a pBR322 restriction fragment showed NETGA binds to 5′-AAAT like netropsin. It causes enhanced cleavage by MPE, particularly at G-C rich sequences and remote from the preferred binding sites. Viscometry measurements provided evidence for biphasic modes of the two binding portions of NETGA. Fluorescence polarization and linear dichroism measurements were in accord with distinct modes of interaction of the acridine (intercalation) and oligopeptide (minor groove binding) portions of NETGA. LD measurments of NETGA indicate that the oligopeptide moiety (netropsin-like) has an orientation typical of minor groove binders, whereas the degree of intercalation of the acridine group is decreased by association of the oligopeptide moiety." @default.
• W2057505488 created "2016-06-24" @default.
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• W2057505488 date "1990-02-01" @default.
• W2057505488 modified "2023-09-23" @default.
• W2057505488 title "Molecular recognition between oligopeptides and nucleic acids. DNA sequence specificity and binding properties of an acridine-linked netropsin hybrid ligand" @default.
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• W2057505488 doi "https://doi.org/10.1002/jmr.300030103" @default.
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