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2
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Sucheck SJ, Ellena JF, Hecht SM. Characterization of Zn(II)·Deglycobleomycin A2 and Interaction with d(CGCTAGCG)2: Direct Evidence for Minor Groove Binding of the Bithiazole Moiety. J Am Chem Soc 1998. [DOI: 10.1021/ja9801801] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steven J. Sucheck
- Contribution from the Departments of Chemistry and Biology, University of Virginia, Charlottesville, Virginia 22901
| | - Jeffrey F. Ellena
- Contribution from the Departments of Chemistry and Biology, University of Virginia, Charlottesville, Virginia 22901
| | - Sidney M. Hecht
- Contribution from the Departments of Chemistry and Biology, University of Virginia, Charlottesville, Virginia 22901
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3
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Boger DL, Ramsey TM, Cai H, Hoehn ST, Kozarich JW, Stubbe J. Assessment of the Role of the Bleomycin A2 Pyrimidoblamic Acid C4 Amino Group. J Am Chem Soc 1998. [DOI: 10.1021/ja971889v] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dale L. Boger
- Contribution from the Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, Departments of Chemistry and Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Merck Research Laboratory, P.O. Box 2000, Rahway, New Jersey 07065
| | - Timothy M. Ramsey
- Contribution from the Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, Departments of Chemistry and Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Merck Research Laboratory, P.O. Box 2000, Rahway, New Jersey 07065
| | - Hui Cai
- Contribution from the Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, Departments of Chemistry and Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Merck Research Laboratory, P.O. Box 2000, Rahway, New Jersey 07065
| | - Silvia T. Hoehn
- Contribution from the Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, Departments of Chemistry and Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Merck Research Laboratory, P.O. Box 2000, Rahway, New Jersey 07065
| | - John W. Kozarich
- Contribution from the Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, Departments of Chemistry and Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Merck Research Laboratory, P.O. Box 2000, Rahway, New Jersey 07065
| | - JoAnne Stubbe
- Contribution from the Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, Departments of Chemistry and Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and Merck Research Laboratory, P.O. Box 2000, Rahway, New Jersey 07065
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4
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Strekowski L, Harden DB, Wydra RL, Stewart KD, Wilson WD. Molecular basis for potentiation of bleomycin-mediated degradation of DNA by polyamines. Experimental and molecular mechanical studies. J Mol Recognit 1989; 2:158-66. [PMID: 2484026 DOI: 10.1002/jmr.300020404] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The bleomycin-mediated degradation of DNA is stimulated (amplified) by certain DNA binding compounds, such as polyamines, that distort the double helix. Computer modelling studies suggest that putrescine (1), spermidine (2), and spermine (3) bind preferentially on the floor of the major groove of (dGdC)5.(dGdC)5. This interaction results in a bend of the oligomer helix toward the major groove and enlargement of the minor groove, both effects being in the order 1 less than 2 less than 3. These polyamine-induced distortions, as obtained from theoretical studies, parallel the experimental values of the amplification activities of 1-3 in the bleomycin-mediated degradation of poly(dGdC).poly(dGdC). The amplification mechanism of non-competitive binding of amplifier molecules in the major groove, and bleomycin in the minor groove, is proposed. It is suggested that the amplifier-induced conformational changes of the DNA helix increase affinity of the activated bleomycin complex toward the DNA minor groove and, consequently, result in an increased efficiency of the bleomycin-mediated degradation of the helix.
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Affiliation(s)
- L Strekowski
- Department of Chemistry, Georgia State University, Atlanta 30303
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