Kang J, Lee MS, Watowich SJ, Gorenstein DG. Combinatorial selection of a RNA thioaptamer that binds to Venezuelan equine encephalitis virus capsid protein.
FEBS Lett 2007;
581:2497-502. [PMID:
17493617 DOI:
10.1016/j.febslet.2007.04.072]
[Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2007] [Accepted: 04/27/2007] [Indexed: 11/18/2022]
Abstract
A phosphorothioate RNA aptamer (thioaptamer) targeting the capsid protein of Venezuelan equine encephalitis virus (VEEV) was isolated by in vitro combinatorial selection. The selected thioaptamer had a strong binding affinity (approximately 7nM) and high specificity for the target protein. For the binding to the protein, the overall tertiary structure of the thioaptamer is required. We introduce two theoretical methods to examine the effect of phosphorothioate modification on the enhancement of binding affinity and one experimental method to examine the nature of the multiple bands of thioaptamer in a native gel.
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