Bifunctional molecules having a DNA intercalator or DNA groove b

Details Bifunctional molecules having a DNA intercalator or DNA groove b Bifunctional molecules having a DNA intercalator or DNA groove b

1987-01-23

1990-07-17

Rollins, John W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 28, 536 29, 546109, 548403, C07H 2100

Patent

active

049422278

ABSTRACT:
Bifunctional molecules having a DNA intercalator or DNA groove binder linked to ethylene diamine tetraacetic acid such as compounds having the formula: ##STR1## wherein R is methyl or ethyl. Also, the method of cleaving DNA by contact with one of the above-identified molecules in the presence of ferrous ion and oxygen.
The process of preparing said molecules by the reaction of P-carboxy methidium halide, p-carboxy ethidium halide, or other DNA intercalator or DNA groove binder with 1-3-diaminopropane followed by condensation with ethylenediamine tetraacetic acid.
Distamycin-EDTA.Fe(II)(DE.FE(II)) contains EDTA attached to the amino terminus of the groove binder tripeptide (tris-N-methylpyrrolecarboxamide). De.Fe(II) cleaves DNA contiguous to a five base pair A+T rich sequence. This is a novel and unique molecule and superior in sequence specificity to the naturally occurring antitumor compound used in man, bleomycin which cleaves DNA at a two base pair recognition site. EDTA-distamycin-Fe(II)(ED.Fe(II)) contains EDTA attached to the carboxy terminus of the groove binder tripeptide, tris-N-methylpyrrolecarboxamide. ED.Fe(II) cleaves DNA contiguous to a five base pair A+T rich sequence. Penta-N-methylpyrrolecarboxamide-EDTA.Fe(II)(P5E.Fe(II)) cleaves on opposite strands at the six base pair recognition level in a catalytic reaction. This is the first designed synthetic molecule that approximates the double strand sequence specific cleavage of DNA(4-6 bp recognition level) by the natural substance restriction enzymes, tools which make possible recombinant DNA manipulations. P5E.Fe(II) cuts DNA at sequences not available by the naturally occurring restriction enzymes.
The dimers, bis(EDTA-distamycin.Fe(II)) and EDTA-bisdistamycin.Fe(II) which double strand cleave DNA at the eight base pair recognition level (A+T rich).

REFERENCES:
patent: 4665184 (1987-05-01), Dervan et al.
Schultz et al., The Chemical Abstracts, 100: 2875w (1984).
Hertzberg et al., The Chemical Abstracts, 101: 67951h (1984).
Taylor et al., The Chemical Abstracts, 101: 3453q (1984).
Schultz et al., The Chemical Abstracts, 100: 205156k (1984).
Van Dyke, Science, 225, pp. 1122-1126 (1984).

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