Abstract:
:Design and synthesis of new small molecules binding to double-stranded RNA necessitate complete understanding of the molecular aspects of the binding of many existing molecules. Toward this goal, in this work we evaluated the biophysical aspects of the interaction of a DNA intercalator (proflavine) and a minor groove binder (hoechst 33258) with two polymorphic forms of polyCG, namely, the right-handed Watson-Crick base paired A-form and the left-handed Hoogsteen base paired H(L)-form, by absorption, fluorescence, and viscometry experiments. The energetics of the interaction of these molecules with the RNA structures has also been elucidated by isothermal titration calorimetry (ITC). Results suggest that proflavine strongly intercalates in both forms of polyCG, whereas hoechst shows mainly groove-binding modes. The binding of both drugs to both forms of RNA resulted in significant conformational change to the RNA structure with the bound molecules being placed in the chiral RNA helix. ITC profiles for both proflavine and hoechst show two binding sites. Binding of proflavine to both forms of RNA is endothermic and entropy driven in the first site and exothermic and enthalpy driven in the second site, whereas hoechst binding to both forms of RNA is exothermic and enthalpy driven in the first site and endothermic and entropy driven in the second site. This study suggests that the binding affinity characteristics and energetics of interaction of these DNA binding molecules with the RNA conformations are significantly different and may serve as data for future development of effective structure-selective RNA-based drugs.
journal_name
DNA Cell Bioljournal_title
DNA and cell biologyauthors
Sinha R,Hossain M,Kumar GSdoi
10.1089/dna.2008.0838subject
Has Abstractpub_date
2009-04-01 00:00:00pages
209-19issue
4eissn
1044-5498issn
1557-7430journal_volume
28pub_type
杂志文章abstract::Peroxisomes are membrane-bound organelles that are best known for their roles in lipid metabolism. Mounting evidence indicates that they are also important nodes for antiviral signaling. While research over the past few decades has revealed effective viral strategies to block antiviral signalling pathways from the pla...
journal_title:DNA and cell biology
pub_type: 杂志文章,评审
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更新日期:2018-05-01 00:00:00
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journal_title:DNA and cell biology
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更新日期:2012-01-01 00:00:00
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更新日期:1993-04-01 00:00:00
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pub_type: 杂志文章
doi:10.1089/dna.1990.9.471
更新日期:1990-09-01 00:00:00
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journal_title:DNA and cell biology
pub_type: 杂志文章
doi:10.1089/dna.2018.4469
更新日期:2019-06-01 00:00:00
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doi:10.1089/dna.1990.9.71
更新日期:1990-01-01 00:00:00
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journal_title:DNA and cell biology
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doi:10.1089/dna.1997.16.111
更新日期:1997-01-01 00:00:00
abstract::To investigate the contribution of de novo variants to Tourette disorder (TD) probands in China. Whole-exome sequencing (WES) conducted on 15 child-parent trios (45 samples) detected 25 coding de novo variants, including 2 de novo Likely Gene Disrupting (LGD) variants and 6 Missense3 variants. The de novo LGD variants...
journal_title:DNA and cell biology
pub_type: 杂志文章
doi:10.1089/dna.2019.4746
更新日期:2020-01-01 00:00:00
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journal_title:DNA and cell biology
pub_type: 临床试验,杂志文章
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更新日期:2005-07-01 00:00:00
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journal_title:DNA and cell biology
pub_type: 杂志文章,评审
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journal_title:DNA and cell biology
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journal_title:DNA and cell biology
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journal_title:DNA and cell biology
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更新日期:2018-11-01 00:00:00
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journal_title:DNA and cell biology
pub_type: 杂志文章,评审
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abstract::Interstitial lung disease (ILD) is the main reason of death in patients with systemic sclerosis (SSc). The potential microRNA (miRNA)-messenger RNA (mRNA) interaction networks of SSc-ILD from a systematic biological perspective are unclear. To characterize differentially expressed miRNAs (DE-miRNAs) and differentially...
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journal_title:DNA and cell biology
pub_type: 杂志文章
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更新日期:2020-10-01 00:00:00
abstract::The search for new chemotherapeutics unaffected by efflux pumps would significantly increase life expectancy in patients with malignant cancers. In this study, butylcycloheptylprodigiosin and undecylprodigiosin were HPLC-purified and verified, using nuclear magnetic resonance spectroscopy. Cell cytotoxicity and transp...
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