Despite advances with triplex-forming oligonucleotides, peptide nucleic acids, polyamides and--more recently--engineered proteins, there remains an urgent need for synthetic ligands that enable specific recognition of double-stranded (ds) DNA to accelerate studies aiming at detecting, regulating and modifying genes. Invaders, i.e., energetically activated DNA duplexes with interstrand zipper ar...

Conjugation of DNA intercalators to triple helix forming oligodeoxynucleotides (ODN's) can enhance ODN binding properties and consequently their potential ability to modulate gene expression. To test the hypothesis that linkage structure could strongly influence the binding enhancement of intercalator conjugation with triplex forming ODN's, we have used a model system to investigate binding avi...

To overcome drug resistance and reduce the side effects of cisplatin, a widely used antineoplastic agent, major efforts have been made to develop next generation platinum-based anticancer drugs. Because cisplatin-DNA adducts block RNA polymerase II unless removed by transcription-coupled excision repair, compounds that react similarly but elude repair are desirable. The monofunctional platinum ...

A novel detection protocol of DNA was developed using electrochemiluminescence (ECL) induced photoelectrochemistry (PEC) synthesis based on DNA-linked CdS NPs superstructure with methylene blue as the intercalator molecule.

Marine dinoflagellates (alveolata) are microalgae of which some cause harmful algal blooms and produce a broad variety of most likely polyketide synthesis derived phycotoxins. Recently, novel polyketide synthesase (PKS) transcripts have been described from the Florida red tide dinoflagellate Karenia brevis (gymnodiniales) which are evolutionarily related to Type I PKS but were apparently expres...

Recently it has been shown that several analogues of the clinically ineffective trans-DDP exhibit antitumor activity comparable to that of cis-DDP. The present paper describes the binding of antitumor trans-[PtCl(2)(E-iminoether)(2)] (trans-EE) to guanosinemonophosphate (GMP) and adenosinemonophosphate (AMP). We have used HPLC and (1)H and (15)N NMR to characterize the different adducts. In the...

A conjugate of a DNA mismatch-specific rhodium intercalator, containing the bulky chrysenediimine ligand, and an aniline mustard has been prepared, and targeting of mismatches in DNA by this conjugate has been examined. The preferential alkylation of mismatched over fully matched DNA is found by a mobility shift assay at concentrations where untethered organic mustards show little reaction. The...

A long-lived and sequence-specific ligand-DNA complex would make possible the modulation of biological processes for extended periods. For this purpose, we are investigating a polyintercalation approach to DNA recognition in which flexible chains of aromatic units thread back and forth repeatedly through the double helix. Here we describe the DNA-binding behaviour of a threading tetra-intercala...

This review provides recent advances in the conversion of CO2 to methanol, methanol hydrocarbons, and direct hydrocarbons via intermediate over various monofunctional bifunctional solid catalysts.