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FEBS Lett. 1998 Dec 18;441(2):322-6.

RNA aptamers that specifically bind to the Ras-binding domain of Raf-1.

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  • 1Department of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, Japan.

Abstract

RNA aptamers that bind to the Ras-binding domain (RBD) of a proto-oncogene product, Raf-1, were isolated from a pool of random sequences using a glutathione S-transferase-fused RBD (GST-RBD). The RNA molecules bind to the GST-RBD, but not to GST, with dissociation constants of about 300 nM. In contrast, these RNA aptamers do not bind to the Ras-binding domain of the RGL protein, which is also known to be activated by Ras. The aptamers actually compete with Ras for binding to the Raf-1 RBD. The anti-Raf-1 aptamers may be used to specifically inhibit the Ras-Raf interaction in the complicated signaling network in mammalian cells.

PMID:
9883908
[PubMed - indexed for MEDLINE]
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