Molecular recognition of AT-DNA sequences by the induced CD pattern of dibenzotetraaza[14]annulene (DBTAA) - adenine derivatives

Radić Stojković, Marijana; Škugor, Marko; Dudek, Łukasz; Grolik, Jarosław; Eilmes, Julita; Piantanida, Ivo (2014) Molecular recognition of AT-DNA sequences by the induced CD pattern of dibenzotetraaza[14]annulene (DBTAA) - adenine derivatives. Beilstein Journal of Organic Chemistry, 10 . pp. 2175-2185. ISSN 1860-5397

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Abstract

An investigation of the interactions of two novel and several known DBTAA–adenine conjugates with double-stranded DNA and RNA has revealed the DNA/RNA groove as the dominant binding site which is in contrast to the majority of reviously studied DBTAA analogues (DNA/RNA intercalators). Only DBTAA–propyladenine conjugates revealed the molecular recognition of AT-DNA by an ICD band pattern > 300 nm, whereas significant ICD bands did not appear for other ds-DNA/RNA. A structure–activity relation for the studied series of compounds showed that the essential structural features for the ICD recognition are a) the presence of DNA-binding appendages (adenine side chain and positively charged side chain) on both DBTAA side chains, and b) the presence of a short propyl linker, which does not support intramolecular aromatic stacking between DBTAA and adenine. The observed AT-DNA-ICD pattern differs from previously reported ss-DNA (poly dT) ICD recognition by a strong negative ICD band at 350 nm, which allows for the dynamic differentiation between ss-DNA (poly dT) and coupled ds-AT-DNA.

Item Type:	Article
Uncontrolled Keywords:	AT-DNA recognition; circular dichroism; DBTAA-adenine conjugate; ds-DNA/RNA; minor groove binding; nucleic acids
Subjects:	NATURAL SCIENCES > Chemistry
Divisions:	Division of Organic Chemistry and Biochemistry
Projects:	Project title Project leader Project code Project type Design, synthesis and interactions of small molecules with DNA, RNA and proteins (Dizajn, sinteza i ispitivanje interakcija malih molekula s DNA, RNA i proteinima) Ivo Piantanida 098-0982914-2918 MZOS
Depositing User:	Marijana Radić Stojković
Date Deposited:	24 May 2016 13:56
URI:	http://fulir.irb.hr/id/eprint/2808
DOI:	10.3762/bjoc.10.225

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