alexa Specific G-quadruplex Ligands Modulate The Alternative Splicing Of Bcl-X | 72859
ISSN: 2329-8936

Transcriptomics: Open Access
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2nd International Conference on Molecular Biology, Nucleic Acids & Molecular Medicine

Carika Weldon, Justine G Dacanay, Vijay Gokhale, Isabelle Behm-Ansmant, Glenn A Burley, Christiane Branlant, Laurence H Hurley, Cyril Dominguez and Ian C Eperon
De Montfort University in Leicester, United Kingdom
ScientificTracks Abstracts: Transcriptomics
DOI: 10.4172/2329-8936-C1-012
Abstract
Sequences with the potential to form RNA G-quadruplexes (G4s) are common in mammalian introns, especially in the proximity of the 5' splice site (5'SS). However, the difficulty of demonstrating that G4s form in pre-mRNA in functional conditions has meant that little is known about their effects or mechanisms of action. We have shown previously that two G4s form in Bcl-X pre-mRNA, one close to each of the two alternative 5'SS. If these G4s affect splicing but are in competition with other RNA structures or RNA binding proteins, then ligands that stabilize them would increase the proportion of Bcl-X pre-mRNA molecules in which either or both G4s had formed, shifting Bcl-X splicing. We show here that a restricted set of G4 ligands do affect splicing, that their activity and specificity are strongly dependent on their structures and that they act independently at the two splice sites. One of the ligands, the ellipticine GQC-05, antagonizes the major 5'SS that expresses the anti-apoptotic isoform of Bcl-X and activates the alternative 5'SS that expresses a pro-apoptotic isoform. We propose mechanisms that would account for these see-saw effects and suggest that these effects contribute to the ability of GQC-05 to induce apoptosis.
Biography

Carika Weldon is a Lecturer in Biomedical Science at De Montfort University in Leicester. She has obtained her BSc in Medical Biochemistry and her PhD in Biochemistry from the University of Leicester. Her Doctoral work focused on alternative splicing of the apoptotic gene Bcl-X.

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