Article (Scientific journals)
Selective recognition of pyrimidine–pyrimidine DNA mismatches by distance-constrained macrocyclic bis-intercalators
Bahr, Matthias; Gabelica, Valérie; Granzhan, Anton et al.
2008In Nucleic Acids Research, 36, p. 5000-5012
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Keywords :
DNA; mismatch; intercalator; mass spectrometry; fluorescence; methyltransferase; noncovalent
Abstract :
[en] Binding of three macrocyclic bis-intercalators, derivatives of acridine and naphthalene, and two acyclic model compounds to mismatch-containing and matched duplex oligodeoxynucleotides was analyzed by thermal denaturation experiments, electrospray ionization mass spectrometry studies (ESI-MS) and fluorescent intercalator displacement (FID) titrations. The macrocyclic bis-intercalators bind to duplexes containing mismatched thymine bases with high selectivity over the fully matched ones, whereas the acyclic model compounds are much less selective and strongly bind to the matched DNA. Moreover, the results from thermal denaturation experiments are in very good agreement with the binding affinities obtained by ESI-MS and FID measurements. The FID results also demonstrate that the macrocyclic naphthalene derivative BisNP preferentially binds to pyrimidine– pyrimidine mismatches compared to all other possible base mismatches. This ligand also efficiently competes with a DNA enzyme (M.TaqI) for binding to a duplex with a TT-mismatch, as shown by competitive fluorescence titrations. Altogether, our results demonstrate that macrocyclic distance- constrained bis-intercalators are efficient and selective mismatch-binding ligands that can interfere with mismatch-binding enzymes.
Research center :
Giga-Systems Biology and Chemical Biology - ULiège
Disciplines :
Chemistry
Biochemistry, biophysics & molecular biology
Author, co-author :
Bahr, Matthias;  RWTH Aachen University > Institute of Organic Chemistry
Gabelica, Valérie ;  Université de Liège - ULiège > Département de chimie (sciences) > Chimie physique, spectrométrie de masse
Granzhan, Anton;  Institut Curie, UMR176 CNRS, Centre Universitaire, F-91405 Orsay, France
Weinhold, Elmar;  RWTH Aachen University > Institute of Organic Chemistry
Teulade-Fichou, Marie-Paule;  Institut Curie, UMR176 CNRS, Centre Universitaire, F-91405 Orsay, France
Language :
English
Title :
Selective recognition of pyrimidine–pyrimidine DNA mismatches by distance-constrained macrocyclic bis-intercalators
Publication date :
2008
Journal title :
Nucleic Acids Research
ISSN :
0305-1048
eISSN :
1362-4962
Publisher :
Oxford University Press, Oxford, United Kingdom
Volume :
36
Pages :
5000-5012
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 30 July 2008

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