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Design of sequence-specific DNA binding ligands that use a two-stranded peptide motif for DNA sequence recognition.

Abstract：

:The design and DNA binding activity of beta-structure-forming peptides and netropsin-peptide conjugates are reported. It is found that a pair of peptides-S,S'-bis(Lys-Gly-Val-Cys-Val-NH-NH-Dns)-bridged by an S-S bond binds at least 10 times more strongly to poly(dG).poly(dC) than to poly(dA).poly(dT). This peptide can also discriminate between 5'-GpG-3' and 5'-GpC-3' steps in the DNA minor groove. Based on these observations, new synthetic ligands, bis-netropsins, were constructed in which two netropsin-like fragments were attached by means of short linkers to a pair of peptides-Gly-Cys-Gly- or Val-Cys-Val-bridged by S-S bonds. These compounds possess a composite binding specificity: the peptide chains recognize 5'-GpG-3' steps on DNA, whereas the netropsin-like fragments bind preferentially to runs of 4 AT base pairs. Our data indicate that combining the AT-base-pair specific properties of the netropsin-type structure with the 5'-GpG-3'-specific properties of certain oligopeptides offers a new approach to the synthesis of ligands capable of recognizing mixed sequences of AT- and GC-base pairs in the DNA minor groove. These compounds are potential models for DNA-binding domains in proteins which specifically recognize base pair sequences in the minor groove of DNA.

journal_name

J Biomol Struct Dyn

journal_title

Journal of biomolecular structure & dynamics

authors

Nikolaev VA,Grokhovsky SL,Surovaya AN,Leinsoo TA,Sidorova NYu,Zasedatelev AS,Zhuze AL,Strahan GA,Shafer RH,Gursky GV

doi

10.1080/07391102.1996.10508927

subject

Has Abstract

pub_date

1996-08-01 00:00:00

pages

31-47

issue

1

eissn

0739-1102

issn

1538-0254

journal_volume

14

pub_type

杂志文章

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