Sense peptides are coded for by the nucleotide sequence (read 5'-->3') of the sense (positive) strand of DNA. Conversely, a complementary peptide is coded for by the nucleotide sequence (read 5'-->3') of the complementary or antisense (negative) strand of DNA. In many instances, sense and corresponding complementary peptides have been observed to interact specifically. In order to study this process in more detail, longer, shorter and mutant variants of our original complementary peptide, VITFFSL, were synthesised and analysed for binding to and inhibition of cytokine human interleukin-1beta (IL- 1beta) in vitro. The behaviour of all peptides studied is discussed in terms of the Mekler- dlis (M-1) pair theory, a theory that accounts for specific sense-complementary peptide interactions in terms of through-space interactions between corresponding pairs of amino acid residues (M-1 pairs)] specified by the genetic code and its complement.
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http://dx.doi.org/10.1002/1439-7633(20020104)3:1<76::AID-CBIC76>3.0.CO;2-N | DOI Listing |
J Phys Chem B
January 2025
OncoImmunin, Inc., 207A Perry Parkway, Suite 6, Gaithersburg, Maryland 20877, United States.
We have previously found that the presence of an H-type excitonic dimer formed by two fluorophores covalently bound to an oligonucleotide allows the delivery of such a polymer into live cells without inducing toxicity. We are now using time-resolved fluorescence measurements in solution to understand the molecular dynamics of an antisense probe and how pairing with complementary sense strands of various lengths and degrees of complementarity affects the antisense strand's properties. We report that a DNA strand composed of 30 residues and labeled with an H-type excitonic Cyanine-5/Cyanine-5 dimer shows a predominant 1.
View Article and Find Full Text PDFbioRxiv
December 2024
Department of Molecular Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, USA.
Thousands of regulatory noncoding RNAs (ncRNAs) have been annotated; however, their functions in gene regulation and contributions to cancer formation remain poorly understood. To gain a better understanding of the influence of ncRNAs on gene regulation during melanoma progression, we mapped the landscape of ncRNAs in melanocytes and melanoma cells. Nearly half of deregulated genes in melanoma are ncRNAs, with antisense RNAs (asRNAs) comprising a large portion of deregulated ncRNAs.
View Article and Find Full Text PDFCells must limit RNA-RNA interactions to avoid irreversible RNA entanglement. Cells may prevent deleterious RNA-RNA interactions by genome organization to avoid complementarity however, RNA viruses generate long, perfectly complementary antisense RNA during replication. How do viral RNAs avoid irreversible entanglement? One possibility is RNA sequestration into biomolecular condensates.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Faculty of Medical Engineering, National University of Science and Technology Politehnica Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania; Advanced Polymer Materials Group, University Politehnica of Bucharest, Gheorghe Polizu 1-7, 011061 Bucharest, Romania; ebio-Hub Research Centre, University Politehnica of Bucharest-Campus, Iuliu Maniu 6, 061344 Bucharest, Romania. Electronic address:
Multiple myeloma (MM), a hematological malignancy which affects the monoclonal plasma cells in the bone marrow, is in rising incidence around the world, accounting for approximately 2 % of newly diagnosed cancer cases in the US, Australia, and Western Europe. Despite the progress made in the last few years in the available therapeutic options (e.g.
View Article and Find Full Text PDFFEBS J
December 2024
Chemical Sciences Department, Universidad Andres Bello, Santiago, Chile.
RNAs are increasingly recognized as promising therapeutic targets, susceptible to modulation by strategies that include targeting with small molecules, antisense oligonucleotides, deoxyribozymes (DNAzymes), or CRISPR/Cas13. However, while drug development for proteins follows well-established paths for rational design based on the accurate knowledge of their three-dimensional structure, RNA-targeting strategies are challenging since comprehensive RNA structures are yet scarce and challenging to acquire. Numerous methods have been developed to elucidate the secondary and three-dimensional structure of RNAs, including X-ray crystallography, cryo-electron microscopy, nuclear magnetic resonance, SHAPE, DMS, and bioinformatic methods, yet they have often revealed flexible transcripts and co-existing populations rather than single-defined structures.
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