Sheehan D, Lunstad B, Yamada CM, Stell BG, Caruthers MH, Dellinger DJ. Biochemical properties of phosphonoacetate and thiophosphonoacetate oligodeoxyribonucleotides.
Nucleic Acids Res 2003;
31:4109-18. [PMID:
12853628 PMCID:
PMC165954 DOI:
10.1093/nar/gkg439]
[Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2003] [Revised: 04/14/2003] [Accepted: 05/02/2003] [Indexed: 11/14/2022] Open
Abstract
Phosphorus-modified phosphonoacetate and thiophosphonoacetate oligodeoxyribonucleotides were chemically synthesized and their biochemical properties evaluated. Under physiological pH, these DNA analogs possess negative charge and form stable, complementary A-like DNA:RNA heteroduplexes when analyzed via circular dichroism spectroscopy. Phosphonoacetate and thiophosphonoacetate oligomers were found to stimulate RNase H activity and to be completely resistant to degradation by snake venom phosphodiesterase, DNase I and HeLa cell nuclear extract. Further research has demonstrated that neutral, esterified forms of these analogs can be taken up by cells. Phosphonoacetate and thiophosphonoacetate oligomers therefore represent a new class of oligodeoxyribonucleotide analogs having phosphorus- carbon bonds with considerable potential for use in biological research.
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