| Literature DB >> 1323845 |
M Mrksich1, W S Wade, T J Dwyer, B H Geierstanger, D E Wemmer, P B Dervan.
Abstract
The designed peptide 1-methylimidazole-2-carboxamide netropsin (2-ImN) binds specifically to the sequence 5'-TGACT-3'. Direct evidence from NMR spectroscopy is presented that this synthetic ligand binds DNA as a 2:1 complex, which reveals that the structure is an antiparallel dimer in the minor groove of DNA. This is in contrast to the 1:1 complexes usually seen with most crescent-shaped minor groove binding molecules targeted toward A+T-rich tracts but reminiscent of a dimeric motif found for distamycin at high concentrations. These results suggest that sequence-dependent groove width may play an important role in allowing an expanded set of DNA binding motifs for synthetic peptides.Entities:
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Year: 1992 PMID: 1323845 PMCID: PMC49755 DOI: 10.1073/pnas.89.16.7586
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205