PMID- 10447202 OWN - NLM STAT- MEDLINE DCOM- 19990923 LR - 20161124 IS - 0739-1102 (Print) IS - 0739-1102 (Linking) VI - 16 IP - 6 DP - 1999 Jun TI - Sequence specific hybridization properties of methylphosphonate oligodeoxynucleotides. PG - 1177-88 AB - Methylphosphonate oligodeoxynucleotides (MPO's) with isomerically pure Rp-configurated methylphosphonates (MP's) were synthesized by block coupling of ApT and TpA dinucleoside methylphosphonates (DMP's, p indicating MP-linkage). Oligonucleotide duplexes (20 mers) with these Rp-MP's showed almost the same melting temperatures (Tm) as those with phosphorodiester bonds. Further a dependence of the duplex stability from the nucleosides (bases) adjacent to the MP moiety was observed. For the first time thermodynamic parameters for the duplex to coil transition of isomerically pure MP's were determined from the concentration dependence of the Tm. CD-spectra of the duplexes show structural changes which can be associated with the transition to a compact helix with higher helix winding angle. FAU - Schweitzer, M AU - Schweitzer M AD - Institute of Organic Chemistry, Johann Wolfgang Goethe-Universitat, Frankfurt am Main, Germany. FAU - Engels, J W AU - Engels JW LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Biomol Struct Dyn JT - Journal of biomolecular structure & dynamics JID - 8404176 RN - 0 (Nucleic Acid Heteroduplexes) RN - 0 (Oligodeoxyribonucleotides) RN - 0 (Organophosphorus Compounds) RN - 329W4YM10Z (methylphosphonic acid) SB - IM MH - Nucleic Acid Conformation MH - Nucleic Acid Heteroduplexes MH - Nucleic Acid Hybridization MH - Oligodeoxyribonucleotides/*chemistry MH - Organophosphorus Compounds/*chemistry MH - Static Electricity EDAT- 1999/08/14 00:00 MHDA- 1999/08/14 00:01 CRDT- 1999/08/14 00:00 PHST- 1999/08/14 00:00 [pubmed] PHST- 1999/08/14 00:01 [medline] PHST- 1999/08/14 00:00 [entrez] AID - 10.1080/07391102.1999.10508326 [doi] PST - ppublish SO - J Biomol Struct Dyn. 1999 Jun;16(6):1177-88. doi: 10.1080/07391102.1999.10508326.