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pubmed-article:11856330pubmed:abstractTextRNA aptamers with affinity for the Ras-binding domain (RBD) of Raf-1 were isolated from a degenerate pool by in vitro selection. These aptamers efficiently inhibited the Ras interaction with the Raf-1 RBD, and also inhibited Ras-induced Raf-1 activation in a cell-free system. The RNA aptamer with the most potent inhibitory effect specifically inhibited the Ras-Raf-1 interaction and had no affinity for the RBD of the RGL protein, a homolog of the Ral GDP dissociation stimulator. Although the aptamer was capable of binding to the B-Raf RBD, the RNA did not inhibit the interaction between Ras and the B-Raf RBD. Enzymatic and chemical probing experiments indicated that the aptamer was folded into a pseudoknot structure, and some loop regions of the pseudoknot were located at the binding interface for the Raf-1 RBD.lld:pubmed
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pubmed-article:11856330pubmed:dateRevised2009-11-19lld:pubmed
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pubmed-article:11856330pubmed:articleTitleAnti-(Raf-1) RNA aptamers that inhibit Ras-induced Raf-1 activation.lld:pubmed
pubmed-article:11856330pubmed:affiliationDepartment of Biophysics and Biochemistry, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, Japan.lld:pubmed
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