In the study by Amano et al. the authors developed a collection of RNA sequences that showed optimal binding and specificity for Fibroblast Growth Factor 5 (FGF5). In the table below are some FGF5 binding data for the lead RNA aptamer sequences: Aptamer F5f1 F5f3 F5f1_56 F5f3_56 Kon (x 105 M-1 S-1) 3.3±0.3 1.7 +0.3 1.8 ± 0.3 1.36± 0.05 Koff (x 10-5 s-1) 20±6 10+2 2.1±0.3 12.5± 0.7 "The kinetic parameters are represented by the mean ± standard error from three independent measurements. Kd (nm) 0.7 +0.2 0.57 + 0.02 0.118 + 0.003 0.92 +0.04 Based upon this data, which aptamer would you consider to be the primary receptor for the FGF5 ligand? Explain your answer.

Biochemistry
6th Edition
ISBN:9781305577206
Author:Reginald H. Garrett, Charles M. Grisham
Publisher:Reginald H. Garrett, Charles M. Grisham
Chapter32: The Reception And Transmission Of Extracellular Information
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 Based on data, which aptamer would consider to be the primary receptor for the FGF5 ligand? Explain your answer.

An RNA aptamer is a sequence that can fold into a specific three-dimensional structure and bind to a ligand
with high affinity. RNA aptamers that bind to specific fibroblast growth factors have shown promise as
anticancer drugs, because they can bind and neutralize pro-growth signaling cascades.
In the study by Amano et al. the authors developed a collection of RNA sequences that showed optimal
binding and specificity for Fibroblast Growth Factor 5 (FGF5). In the table below are some FGF5 binding
data for the lead RNA aptamer sequences:
Aptamer
Koff (x 10-5 s-1)
20+6
10+2
2.1 ± 0.3
12.5± 0.7
"The kinetic parameters are represented by the mean ± standard error from three independent measurements.
F5f1
F5f3
Kon (* 105 M-1 S-1¹)
3.3 ± 0.3
1.7± 0.3
F5f1_56
F5f3_56
1.8 ±0.3
1.36 +0.05
Kd (nm)
0.7± 0.2
0.57 ± 0.02
0.118 + 0.003
0.92 +0.04
) Based upon this data, which aptamer would you consider to be the primary receptor for the FGF5 ligand?
Explain your answer.
Transcribed Image Text:An RNA aptamer is a sequence that can fold into a specific three-dimensional structure and bind to a ligand with high affinity. RNA aptamers that bind to specific fibroblast growth factors have shown promise as anticancer drugs, because they can bind and neutralize pro-growth signaling cascades. In the study by Amano et al. the authors developed a collection of RNA sequences that showed optimal binding and specificity for Fibroblast Growth Factor 5 (FGF5). In the table below are some FGF5 binding data for the lead RNA aptamer sequences: Aptamer Koff (x 10-5 s-1) 20+6 10+2 2.1 ± 0.3 12.5± 0.7 "The kinetic parameters are represented by the mean ± standard error from three independent measurements. F5f1 F5f3 Kon (* 105 M-1 S-1¹) 3.3 ± 0.3 1.7± 0.3 F5f1_56 F5f3_56 1.8 ±0.3 1.36 +0.05 Kd (nm) 0.7± 0.2 0.57 ± 0.02 0.118 + 0.003 0.92 +0.04 ) Based upon this data, which aptamer would you consider to be the primary receptor for the FGF5 ligand? Explain your answer.
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