Peptide bis-intercalator binds DNA via threading mode with sequence specific contacts in the major groove
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چکیده
منابع مشابه
Sequence-specific intercalating agents: intercalation at specific sequences on duplex DNA via major groove recognition by oligonucleotide-intercalator conjugates.
An acridine derivative was covalently linked to the 5' end of a homopyrimidine oligonucleotide. Specific binding to a homopurine-homopyrimidine sequence of duplex DNA was demonstrated by spectroscopic studies (absorption and fluorescence) and by "footprinting" experiments with a copper phenanthroline chelate used as an artificial nuclease. A hypochromism and a red shift of the acridine absorpti...
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The designed peptide pyridine-2-carboxamidonetropsin (2-PyN) binds to the minor groove of double-helical DNA at two very different sequences, 5’-TTTTT-3’ and 5’-TGTCA-3’, with comparable energetics but quite different structures. 2-PyN likely binds the 5’-TTTTT-3’ site as a 1:l complex, whereas 2-PyN binds 5’-TGTCA-3’ sites as a 2:l complex. In order to enhance the binding affinity of 2-PyN for...
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A redox active and electrochemiluminescent (ECL) threading bis-intercalator, consisting of two N,N'-bis(3-propyl-imidazole)-1,4,5,8-naphthalene diimides (PIND) linked by a Ru(dmbpy)2(2+) (dmbpy = 4,4'-dimethyl-2,2'-bipyridine) complex (PIND-Ru-PIND), was synthesized for the first time. Its optical, electrochemical, and ECL properties were studied. UV-vis spectrophotometric measurements indicate...
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Contact sites of AraC protein to the regulatory site araI of the Escherichia coli araBAD operon have been determined by the chemical-interference technique. DNA fragments were chemically modified an average of once per molecule, and fragments that no longer bound AraC were separated by gel electrophoresis from the DNA fragments still able to bind the protein. The contact sites were then determi...
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A 17-amino acid arginine-rich peptide from the bovine immunodeficiency virus Tat protein has been shown to bind with high affinity and specificity to bovine immunodeficiency virus transactivation response element (TAR) RNA, making contacts in the RNA major groove near a bulge. We show that, as in other peptide-RNA complexes, arginine and threonine side chains make important contributions to bin...
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ژورنال
عنوان ژورنال: Chemistry & Biology
سال: 2001
ISSN: 1074-5521
DOI: 10.1016/s1074-5521(01)00013-8